Choosing an Electrical Switch
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Choosing a Proximity Switch
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Hinge-Actuated Safety Switches
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Replace access door hinges with these switches; they actuate when the door opens at least 4°. Also known as interlock switches, they ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. All have positive-force, normally-closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick. In addition to access doors, these switches can also be used on machine guards constructed from aluminum T-slotted framing. They’re rated IP65 for protection from washdowns.
For technical drawings and 3-D models, click on a part number.
Overall | ||||||||||||
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No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Wire Connection Type | Conduit Thread Size | Ht. | Wd. | Dp. | Each | |
3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Springs Back (Momentary) | 6 | 3PST-1NO/2NC | 2 A @ 250 V AC | Screw Terminals | M20 | 3.62" | 4.39" | 1.42" | 0000000 | 0000000 |
Frame-Mounted Safety Switches
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Also known as interlock switches, these ensure the safety of personnel by automatically shutting off power to machinery when an access door opens. Mount the switch to the door frame and mount a key to the door so that the key is inserted into the switch when the door is closed. When the door opens, the key is removed from the switch and the machine shuts down. They’re often used with machine guards.
Style A-F have positive-force, normally closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick.
NEMA 6 rated switches protect against temporary submersion and washdowns.
NEMA 4 rated switches protect against washdowns.
IP67 rated switches protect against temporary submersion.
Flexible keys (sold separately) pivot 15° to make it easier to align with the switch during installation.
For technical drawings and 3-D models, click on a part number.
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Housing | ||||||||||||||||
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Style | No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage | Ht. | Wd. | Dp. | Conduit Trade Size | Conduit Thread Size | Key Included | Environmental Rating | Each | |
Wire Lead Connection with Positive-Force Normally Closed Contacts | ||||||||||||||||
A | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 2 | DPST-1NO/1NC | 8 A @ 120 V AC, 4 A @ 24 V DC | 24V DC 250V AC | 3.3" | 1.2" | 1.2" | __ | M16 | Yes | IP67 | 00000000 | 0000000 |
Screw Terminal Connection with Positive-Force Normally Closed Contacts | ||||||||||||||||
B | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-1NO/1NC | 5 A @ 120 V AC, 2 A @ 24 V DC | 250V DC 500V AC | 3" | 1" | 1.1" | 1/2 | __ | Yes | NEMA 6, IP67 | 00000000 | 000000 |
C | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-1NO/1NC | 10 A @ 120 V AC, 2 A @ 24 V DC | 24V DC 250V AC | 3.6" | 2.1" | 1.3" | 1/2 | __ | Yes | NEMA 4, IP65 | 00000000 | 000000 |
C | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 3 | 3PST-1NO/2NC | 8 A @ 120 V AC, 4 A @ 24 V DC | 250V DC 600V AC | 3.5" | 2.1" | 1.2" | 1/2 | __ | Yes | IP67 | 00000000 | 000000 |
C | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 4 A @ 230 V AC, 4 A @ 24 V DC | 24V DC 500V AC | 3.5" | 2" | 1.2" | __ | M16 | Yes | IP67 | 00000000 | 000000 |
D | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 6 A @ 120 V AC, 0.27 A @ 24 V DC | 240V AC 250V DC | 3.8" | 1.2" | 1.2" | 1/2 | __ | Yes | IP67 | 00000000 | 000000 |
E | 2 | 1 Off (Normally Open) and 1 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-1NO/1NC | 8 A @ 230 V AC, 5 A @ 24 V DC | 24V DC 400V AC | 4.2" | 2" | 1.6" | __ | M20 | No | IP67 | 00000000 | 00000 |
E | 2 | 2 On (Normally Closed) | Stays Switched (Maintained) | 4 | DPST-NC | 8 A @ 230 V AC, 5 A @ 24 V DC | 24V DC 400V AC | 4.2" | 2" | 1.6" | __ | M20 | No | IP67 | 00000000 | 00000 |
Screw Terminal Connection with Positive-Force Normally Closed Contacts and Rotating Head | ||||||||||||||||
C | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 5 A @ 120 V AC, 5 A @ 24 V DC | 400V DC 400V AC | 3.5" | 2" | 1.299" | 1/2 | __ | Yes | IP65 | 00000000 | 000000 |
D | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 10 A @ 120 V AC, 2.5 A @ 125 V DC | 240V AC 250V DC | 3.8" | 1.2" | 1.2" | __ | M20 | No | IP67 | 00000000 | 00000 |
F | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 10 A @ 230 V AC, 4 A @ 24 V DC | 24V DC 250V AC | 4.3" | 1.6" | 1.4" | __ | M20 | No | IP67 | 00000000 | 000000 |
Screw Terminal Connection with Rotating Head | ||||||||||||||||
G | 4 | 2 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 8 | 4PST-2NO/2NC | 2.5 A @ 120 V AC, 1 A @ 125 V DC | 120V AC 125V DC | 7.1" | 1.5" | 1.5" | 1/2 | __ | No | IP67 | 00000000 | 000000 |
O'all | |||||||
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Angle Range | Adjustability | Lg. | Wd. | Mounting Fasteners Included | Each | ||
Straight Keys | |||||||
For Style G | __ | __ | 48.5mm | 35mm | No | 00000000 | 000000 |
For Style F | __ | __ | 86mm | 32mm | No | 00000000 | 00000 |
For Style E | __ | __ | 80mm | 32mm | No | 00000000 | 0000 |
90° Angle Keys | |||||||
For Style E | __ | __ | 65.5mm | 32mm | No | 00000000 | 00000 |
Flexible Keys | |||||||
For Style D | 0°-15° | Up/Down/Left/Right | 48.9mm | 55mm | No | 000000000 | 00000 |
For Style G | 0°-15° | Up/Down/Left/Right | 50.4mm | 55mm | No | 00000000 | 00000 |
For Style F | 0°-15° | Up/Down/Left/Right | 105mm | 40mm | No | 00000000 | 000000 |
Access-Delay Frame-Mounted Safety Switches
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Delay access to hazardous areas until conditions are safe; use these switches with machines that take time to stop after they are turned off. Mount the switch to the door frame and mount the key to the door so that the key is inserted into the switch when the door is closed. When the door is pulled, the key is held in place with 225 lbs. of force until the switch receives a signal from a time-delay relay, motion sensor, or position sensor (not included) that the machine’s motion has stopped. After the motion has stopped, the key can be removed from the switch, releasing the access door. They’re often used with machine guards. All have positive-force, normally-closed contacts that will open a circuit when the switch is actuated even if a spring fails or the contacts stick. They’re rated for protection from washdowns and temporary submersion.
Style A and B have a key entry on the top and side of the switch.
Style C has a key entry on two opposite sides of the switch.
Emergency override keys (sold separately) bypass the access delay feature.
For technical drawings and 3-D models, click on a part number.
Housing | ||||||||||||||||
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Style | No. of Circuits Controlled | Switch Starting Position | Switch Action | No. of Terminals | Industry Designation | Switching Current @ Voltage | Max. Voltage | Input Voltage | Holding Force, lbs. | Ht. | Wd. | Dp. | Wire Connection Type | Conduit Trade Size | Each | |
Positive-Force Normally Closed Contacts | ||||||||||||||||
A | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 5 A @ 120 V AC, 2 A @ 24 V DC | 500V AC 250V DC | 24V AC, 24V DC | 225 | 4.7" | 2.3" | 1.4" | Screw Terminals | 1/2 | 0000000 | 0000000 |
A | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 6 | 3PST-1NO/2NC | 5 A @ 120 V AC, 2 A @ 24 V DC | 500V AC 250V DC | 110V AC | 225 | 4.7" | 2.3" | 1.4" | Screw Terminals | 1/2 | 0000000 | 000000 |
B | 3 | 1 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 14 | 3PST-1NO/2NC | 3 A @ 120 V AC, 2.5 A @ 24 V DC | 250V DC 240V AC | 24V DC | 225 | 3.7" | 3.5" | 1.4" | Screw Terminals | 1/2 | 0000000 | 000000 |
Positive-Force Normally Closed Contacts and Rotating Head | ||||||||||||||||
C | 4 | 2 Off (Normally Open) and 2 On (Normally Closed) | Stays Switched (Maintained) | 8 | 4PST-2NO/2NC | 4 A @ 120 V AC, 4 A @ 24 V DC | 240V AC 24V DC | 24V AC, 24V DC | 225 | 7.6" | 1.2" | 1.6" | Screw Terminals | 1/2 | 0000000 | 000000 |
Emergency Override Key for Style A | 0000000 | Each | 000000 |
Light Beam Safety Barrier Switches
Immediately cut power to machinery by breaking the light beam between the two barriers. Light beams can travel up to 32 feet between the transmitter and receiver. For a complete system, combine a transmitter, receiver, safety relay, and connectors (sold separately). Switches will automatically produce PNP or NPN signal output based on the device they are connected to. To selectively allow material to pass through the sensing field, you can program the system to allow one or more beams to be broken without shutting off your machine.
Note: These switches cannot be used with a full-revolution clutch press or machine. Use only with machinery that can consistently and immediately stop anywhere in its cycle.
Safety relays have a microprocessor that monitors safety components, such as emergency stops and light curtains, and sends a signal to stop the operation if a failure is detected and restart when the issue is resolved. They also help with diagnostic tasks because of their feedback circuit, which allows basic relays to communicate their status back to the safety relay. Any system that doesn’t have a safety control component will need a safety relay.
Transmitter and receiver connecting cords allow you to connect multiple safety barrier switches in a row. They include one cord to connect two transmitters, and one cord to connect two receivers.
Optional adjustable brackets allow the transmitter and receiver to swivel from side-to-side, making it easier to align them during installation.
IP67 rated components are protected from temporary submersion.
For technical drawings and 3-D models, click on a part number.
![]() | ![]() 5-Pole Micro M12 |
![]() 8-Pole Micro M12 |
Plug Type | |||||||||||||||
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Light Beam Ht. | Light Beam Switch Operation | Sensing Distance, ft. | Input Voltage | Current Output | Signal Output Type | Transmitter | Receiver | Ht. | Wd. | Dp. | Housing Material | Color | Cable Lg., ft. | Each | |
6.3" | On When Object Absent | 1-32 | 24V DC | 115mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 8.2" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 000000000 |
9.4" | On When Object Absent | 1-32 | 24V DC | 120mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 11.3" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
12.6" | On When Object Absent | 1-32 | 24V DC | 130mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 14.5" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
15.7" | On When Object Absent | 1-32 | 24V DC | 140mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 17.6" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
18.9" | On When Object Absent | 1-32 | 24V DC | 130mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 20.8" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
22" | On When Object Absent | 1-32 | 24V DC | 135mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 23.9" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
28.3" | On When Object Absent | 1-32 | 24V DC | 150mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 30.2" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
34.6" | On When Object Absent | 1-32 | 24V DC | 160mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 36.5" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
47.2" | On When Object Absent | 1-32 | 24V DC | 190mA | PNP/NPN | 5-pole Micro M12 | 8-pole Micro M12 | 49.1" | 1.4" | 1.4" | Powder-Coated Aluminum | Yellow | 1 | 0000000 | 00000000 |
Replacement Brackets | 0000000 | Each | 000000 |
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Control and diagnose issues with safety-critical circuits. These relays have a microprocessor that monitors safety components, such as emergency stops and light curtains, and sends a signal to stop the operation if a failure is detected and restart when the issue is resolved. They also help with diagnostic tasks because of their feedback circuit, which allows basic relays to communicate their status back to the safety relay. These relays have a duplicate set of input and output signals, so they’ll still stop the controlled device if one of the inputs fails.
IP20 rated, they have recessed terminals which prevent fingers and other objects from touching live circuits. These relays have been tested to multiple safety standards and can help achieve PL, SIL, or CAT system ratings. They also meet ISO and IEC standards for machine safety.
Mount them to 35 mm DIN rail (also known as DIN 3 Rail) for fast installation.
Relays and auxiliary contact blocks with delayed safety outputs are often used where power must be maintained after an input signal is received. For example, after a stop button for a machine is pressed, the guard door will stay locked until the machine cycle is finished.
Auxiliary contact blocks (sold separately) allow you to control more components, such as signaling devices or basic relays.
Number of Terminals | Input Voltage | Switching Current @ Voltage | Maximum Switching Voltage | Wire Connection Type | Ht. | Wd. | Dp. | For Use With | Maximum System Safety Rating | Features | Each | |
2 Circuits Controlled with 2 Off (Normally Open) | ||||||||||||
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14 | 24V DC | 2 A @ 240 V AC, 1.5 A @ 24 V DC | 250V AC | Terminal Block | 4.9" | 0.69" | 4.3" | Emergency Stops, Light Curtains | PLe, SIL3, CAT 4, 250V | Auxiliary PNP Output, LED Indicator | 0000000 | 0000000 |
4 Circuits Controlled with 4 Off (Normally Open) | ||||||||||||
18 | 24V DC | 2 A @ 240 V AC, 1.5 A @ 24 V DC | 250V AC | Terminal Block | 4.9" | 0.89" | 4.3" | Emergency Stops, Light Curtains | PLe, SIL3, CAT 4, 250V | Auxiliary PNP Output, LED Indicator | 0000000 | 000000 |
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Wire Connection Type | No. of Wire Leads | Cable Lg., ft. | Each | |
Wire Leads | 5 | 32.5 | 0000000 | 0000000 |
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Wire Connection Type | No. of Wire Leads | Cable Lg., ft. | Each | |
Wire Leads | 8 | 32.5 | 0000000 | 0000000 |
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Cable Lg., ft. | Each | |
9.5 | 0000000 | 0000000 |
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No. of Cords | Cable Lg. | Each | |
2 | 8" | 0000000 | 0000000 |
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No. of Brackets | Each | |
2 | 0000000 | 000000 |
Wide-Angle Safety Barrier Switches
Scanning 275° side-to-side for people and objects, these switches (known as safety laser scanners) cover large areas and send signals to machinery to prevent accidents. Unlike other safety switches, which have a separate transmitter and receiver, these switches include the transmitter and receiver in a single unit. They trigger when light bounces off an object and back to the switch.
These switches respond to two types of areas: safety zones and warning zones. Safety zones act like traditional barrier switches—when a person or object enters the safety zone, they shut down machinery. When used with automatic guided vehicles (AGVs), the safety zone makes sure the vehicle has enough time to stop. Unlike other barrier switches, you can also add warning zones. Entering the warning zone triggers flashing lights, sirens, and other alarms, but doesn’t stop the machine. For AGVs, objects in the warning zone trigger reduced speed. Set up multiple warning zones to trigger escalating signals and precautions as the person or object gets closer to the machine. Switches with 10 or more zone settings let AGVs take more complex routes.
To program what areas to protect, what size objects they’ll detect, configure inputs and outputs, and view data, these switches come with their own software. This includes a muting feature, so you can program them to allow specific materials to pass through the scanning field without triggering a shut down. All have PNP output, so they communicate by sending a positive signal. They also have four LED status indicators and a digital display with push-button controls.
Rated IP65, these switches can be hosed down. They’re UL and C-UL listed, CE marked, and TUV certified, so they meet U.S. and international safety standards. They also meet EN, ISO, and IEC standards for performance and safety.
When choosing a switch, consider how much area you need to cover and how many machines you want to control. Independent switches monitor up to 275° of a single area. For more coverage, use master switches with up to three remote switches. This system can monitor a full circle around a large machine or a long space, such as the area along a conveyor. Connect remote switches to each other and to the master switch using remote switch cables. The number of safety outputs, also known as output signal switching devices (OSSDs), tells you how many machines you can control. Each output has a pair of signals that shut down a single machine—if one signal fails, the other takes over as a failsafe.
Master switches with encoder input monitor and adjust your AGV's speed without needing a separate PLC or other controller. Mount them directly onto your vehicle to make sure the safety zone is always large enough to prevent collisions.
Switches with 8- and 12-pole M12 sockets offer versatility as your application changes—use either the 8-pole or 12-pole connection without having to rewire. Switches with 8- and 17-pole M12 sockets require you to use the 17-pole connection; the 8-pole connection is optional if you want more inputs.
Safety relays have a microprocessor that monitors safety components, such as emergency stops and light curtains, and sends a signal to stop the operation if a failure is detected and restart when the issue is resolved. They also help with diagnostic tasks because of their feedback circuit, which allows basic relays to communicate their status back to the safety relay. They have self-monitoring circuitry, so they’ll keep working even if there’s a component or power failure. Any system that doesn’t have a safety control component will need a safety relay. They meet ISO and IEC standards for performance and safety. Rated IP20, they prevent fingers and other objects from touching live circuits. However, they’re not protected from water.
Power/input/output cables are required for independent and master switches. Data cables are required for connecting switches to your computer. This lets you program and monitor the switches, as well as read their measurement data.
Tilt mounting brackets up and down to make switches scan the correct area. Side-to-side brackets also move left and right. Add protective brackets to shield the tops of switches from falling objects and collisions. Use them with a mounting bracket.
For technical drawings and 3-D models, click on a part number.
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Safety Zone Sensing Distance Range (Object Size Detected) | Warning Zone Sensing Distance Range | Max. No. of Zone Settings (Socket Connection) | Beam Dia., mm | Input Voltage | Current Output | Signal Output Type | Wd. | Ht. | Dp. | Housing Material | Housing Color | Each | |
Independent Switches | |||||||||||||
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8-Pole M12 Socket Connection | |||||||||||||
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”, 2”, 2.8”, 5.9”) | 2"-131.2 ft. | 6 (8-Pole M12) | 8 | 24V DC | 250mA | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 000000000 |
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”) 2”-13.1 ft. (2”) 2”-18 ft. (2.8”, 5.9”) | 2"-131.2 ft. | 6 (8-Pole M12) | 8 | 24V DC | 250mA | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
Master Switches | |||||||||||||
8- and 12-Pole M12 Socket Connections | |||||||||||||
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”, 2”, 2.8”, 5.9”) | 2"-131.2 ft. | 3 (8-Pole M12) 10 (12-Pole M12) | 8 | 24V DC | 250mA | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”) 2”-13.1 ft. (2”) 2”-18 ft. (2.8”, 5.9”) | 2"-131.2 ft. | 3 (8-Pole M12) 10 (12-Pole M12) | 8 | 24V DC | 250mA | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
8- and 17- Pole M12 Socket Connections | |||||||||||||
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”, 2”, 2.8”, 5.9”) | 2"-131.2 ft. | 20 (17-Pole M12) 70 (8- and 17-Pole M12) | 8 | 24V DC | 250mA | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”) 2”-13.1 ft. (2”) 2”-18 ft. (2.8”, 5.9”) | 2"-131.2 ft. | 20 (17-Pole M12) 70 (8- and 17-Pole M12) | 8 | 24V DC | 250mA | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
Master Switches with Encoder Input | |||||||||||||
8- and 17-Pole M12 Socket Connections | |||||||||||||
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”) 2”-13.1 ft. (2”) 2”-18 ft. (2.8”, 5.9”) | 2"-131.2 ft. | 70 (8- and 17-Pole M12) | 8 | 24V DC | 250mA | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
Remote Switches | |||||||||||||
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”, 2”, 2.8”, 5.9”) | 2"-131.2 ft. | __ | 8 | 24V DC | __ | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
2”-8.2 ft. (1.2”) 2”-9.8 ft. (1.6”) 2”-13.1 ft. (2”) 2”-18 ft. (2.8”, 5.9”) | 2"-131.2 ft. | __ | 8 | 24V DC | __ | PNP | 4" | 6" | 4.4" | Powder-Coated Aluminum | Yellow | 0000000 | 00000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/793/7933n23-@halfx_637285899149368079.png?ver=imagenotfound)
Number of Terminals | Input Voltage | Switching Current @ Voltage | Max. Switching Voltage | Wire Connection Type | Ht. | Wd. | Dp. | For Use With | No. of Safety Outputs | Max. System Safety Rating | Features | Each | |
3 Circuits Controlled with 3 Off (Normally Open) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
6 | 24V DC | 6 A @ 240 V AC, 6 A @ 24 V DC | 240V AC | Screw Terminals | 3.7" | 0.9" | 4.8" | Light Curtains | 3 | PLe, SIL3 | Auxiliary PNP Output, Self-Monitoring Circuitry | 0000000 | 0000000 |
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Hardwire Connection | |||||
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For Component | Plug Type | Wire Connection Type | No. of Wire Leads | Each | |
9.75 ft. Cable Lg. | |||||
Independent Switch Master Switch Master Switch with Encoder Input | 8-Pole M12 | Wire Leads | 8 | 0000000 | 000000 |
Master Switch | 12-Pole M12 | Wire Leads | 12 | 0000000 | 00000 |
Master Switch Master Switch with Encoder Input | 17-Pole M12 | Wire Leads | 17 | 0000000 | 00000 |
32.75 ft. Cable Lg. | |||||
Independent Switch Master Switch Master Switch with Encoder Input | 8-Pole M12 | Wire Leads | 8 | 0000000 | 00000 |
Master Switch | 12-Pole M12 | Wire Leads | 12 | 0000000 | 000000 |
Master Switch Master Switch with Encoder Input | 17-Pole M12 | Wire Leads | 17 | 0000000 | 000000 |
82 ft. Cable Lg. | |||||
Independent Switch Master Switch Master Switch with Encoder Input | 8-Pole M12 | Wire Leads | 8 | 000000 | 00000 |
Master Switch | 12-Pole M12 | Wire Leads | 12 | 0000000 | 000000 |
Master Switch Master Switch with Encoder Input | 17-Pole M12 | Wire Leads | 17 | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/793/7933n2polished-steelpositive_right_positive_top_flop15_1592926382_950@halfx_637285053788811438.png?ver=imagenotfound)
Mounting | ||||||
---|---|---|---|---|---|---|
For Component | Bracket Movement (Range of Motion) | Material | Fasteners Included | Thread Size (No. of Holes) | Each | |
Independent Switch Master Switch Master Switch with Encoder Input Remote Switch | Up/Down (6°) | Zinc-Plated Steel | No | M5 × 0.8 mm (2) | 0000000 | 0000000 |
Independent Switch Master Switch Master Switch with Encoder Input Remote Switch | Up/Down (6°) Side-to-Side (8.5°) | Zinc-Plated Steel | No | M5 × 0.8 mm (2) | 000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/793/7933n22polished-steelpositive_right_positive_top_flop15_1592926574_165@halfx_637285054490620222.png?ver=imagenotfound)
For Component | Material | Mounting Fasteners Included | Each | |
Independent Switch Master Switch Master Switch with Encoder Input Remote Switch | Zinc-Plated Steel | Yes | 0000000 | 000000 |
Safety Relays with Diagnostic Capabilities
Control and diagnose issues with safety-critical circuits. These relays have a microprocessor that monitors safety components, such as emergency stops and light curtains, and sends a signal to stop the operation if a failure is detected and restart when the issue is resolved. They also help with diagnostic tasks because of their feedback circuit, which allows basic relays to communicate their status back to the safety relay. These relays have a duplicate set of input and output signals, so they’ll still stop the controlled device if one of the inputs fails.
IP20 rated, they have recessed terminals which prevent fingers and other objects from touching live circuits. These relays have been tested to multiple safety standards and can help achieve PL, SIL, or CAT system ratings. They also meet ISO and IEC standards for machine safety.
Mount them to 35 mm DIN rail (also known as DIN 3 Rail) for fast installation.
Relays and auxiliary contact blocks with delayed safety outputs are often used where power must be maintained after an input signal is received. For example, after a stop button for a machine is pressed, the guard door will stay locked until the machine cycle is finished.
Auxiliary contact blocks (sold separately) allow you to control more components, such as signaling devices or basic relays.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/632/6322n11-@halfx_1690399162.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/632/6322n15-@halfx_1690399162.png?ver=imagenotfound)
Number of Terminals | Input Voltage | Switching Current @ Voltage | Max. Switching Voltage | Ht. | Wd. | Dp. | For Use With | Max. System Safety Rating | Features | Each | |
2 Circuits Controlled | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
2 Off (Normally Open) | |||||||||||
14 | 24V DC | 2 A @ 240 V AC 1.5 A @ 24 V DC | 250V AC | 4.9" | 0.69" | 4.3" | Emergency Stops, Light Curtains | PLe, SIL3, CAT 4, 250V | Auxiliary PNP Output, LED Indicator | 0000000 | 0000000 |
2 Safety Outputs with 2 Off (Normally Open) and 2 Delayed Safety Outputs with 2 Off (Normally Open) | |||||||||||
16 | 24V DC | 3 A @ 240 V AC 3 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Emergency Stops, Light Curtains | PLe, SIL3 | Time Delay | 0000000 | 000000 |
2 Safety Outputs with 2 Off (Normally Open) and 1 Signal Output with 2 On (Normally Closed) | |||||||||||
16 | 24V AC, 24V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 000000 |
16 | 24V AC, 24V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Two-Hand Switches | PLe, SIL3 | __ | 0000000 | 000000 |
3 Safety Outputs with 2 Off (Normally Open) and 1 Signal Output with 2 On (Normally Closed) | |||||||||||
16 | 240V AC | 3 A @ 240 V AC 2.5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 1.8" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 000000 |
24 | 24V AC, 48V AC, 120V AC, 240V AC, 24V DC, 48V DC, 60V DC, 120V DC, 240V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 4.42" | 0.9" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 00000000 |
3 Circuits Controlled | |||||||||||
3 Safety Outputs with 3 Off (Normally Open) | |||||||||||
6 | 24V DC | 6 A @ 240 V AC 6 A @ 24 V DC | 240V AC | 3.7" | 0.9" | 4.8" | Light Curtains | PLe, SIL3 | Auxiliary PNP Output, Self-Monitoring Circuitry | 0000000 | 000000 |
3 Safety Outputs with 2 Off (Normally Open) and 1 Signal Output with 2 On (Normally Closed) | |||||||||||
16 | 24V AC, 24V DC | 5 A @ 240 V AC 5 A @ 24 V DC | 250V AC 250V DC | 3.9" | 0.9" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 000000 |
4 Circuits Controlled | |||||||||||
4 Off (Normally Open) | |||||||||||
18 | 24V DC | 2 A @ 240 V AC 1.5 A @ 24 V DC | 250V AC | 4.9" | 0.89" | 4.3" | Emergency Stops, Light Curtains | PLe, SIL3, CAT 4, 250V | Auxiliary PNP Output, LED Indicator | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/632/6322n17-@halfx_1690399182.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/632/6322n18-@halfx_1690399182.png?ver=imagenotfound)
Number of Terminals | Input Voltage | Switching Current @ Voltage | Max. Switching Voltage | Ht. | Wd. | Dp. | Features | Each | |
5 Safety Outputs | |||||||||
---|---|---|---|---|---|---|---|---|---|
16 | 24V AC, 24V DC | 2.5 A @ 24 V DC 3 A @ 240 V AC | 250V AC, 250V DC | 3.9" | 0.9" | 4.5" | __ | 0000000 | 0000000 |
4 Delayed Safety Outputs | |||||||||
16 | 24V DC | 3 A @ 240 V AC 3 A @ 24 V DC | 250V AC, 250V DC | 3.9" | 0.9" | 4.5" | Time Delay | 0000000 | 000000 |
High-Limit Temperature Controllers
To protect equipment and personnel, these controllers shut down your machine when it gets too hot. Reset them manually to turn your machine on again. They're often used as a fail-safe system and for triggering alarms.
Set the actuation point and adjust other settings with the keypad. To read the temperature, these controllers use a highly sensitive thermocouple probe (sold separately). They have one or two mechanical relays that actuate circuits directly. Mount them into instrumentation panels with DIN cutouts.
Controllers that are SPDT (single pole, double throw) can turn one circuit from off to on (normally open) or on to off (normally closed).
Controllers that are SPST-NO (single pole, single throw) can turn one circuit from off to on (normally open).
Remote-reset controllers are best for hard-to-reach locations. To operate, you’ll need to wire the remote reset input terminals, and the sensor must be below the set temperature.
To mount 1/16 DIN controllers to a surface or DIN rail, add DIN-rail/surface-mount adapters. To convert larger cutouts to fit 1/16 DIN controllers, add DIN cutout adapters.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/591/5916n11-@halfx_637570348519644635.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/591/5916n12-@halfx_637570348956910583.png?ver=imagenotfound)
Mechanical Relay | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Total No. of Outputs | Output Type | Industry Designation | Max. Switching Current @ Voltage | For Probe Type | Reset Type | Input Voltage Range | Environmental Rating | Features | Each | |
1/16 DIN—For 1 3/4" Ht. x 1 3/4" Wd. Panel Cutout | ||||||||||
1 | Heating—One Mechanical Relay | SPDT | 2 A @ 240 V AC | Thermocouple | Manual | 90V AC to 264V AC | IP20, IP30 | Remote Reset | 0000000 | 0000000 |
2 | Heating—Two Mechanical Relays | SPST-NO SPDT | 2 A @ 240 V AC | Thermocouple | Manual | 90V AC to 264V AC | IP20, IP30 | __ | 0000000 | 000000 |
1/4 DIN—For 3 5/8" Ht. x 3 5/8" Wd. Panel Cutout | ||||||||||
2 | Heating—Two Mechanical Relays | SPDT | 2 A @ 240 V AC | Thermocouple | Manual | 90V AC to 250V AC | IP20, IP30 | Remote Reset | 0000000 | 000000 |
![](/prerenderstable/mvPRE/contents/gfx/imagecache/386/38615k113-@halfx_637570348521851768.png?ver=imagenotfound)
Mounting | ||||
---|---|---|---|---|
Fasteners Included | Screw Size | Number of Holes | Each | |
No | No. 6 | 2 | 000000000 | 000000 |
Benchtop Autotuning Temperature Controllers
Built into an enclosure, these temperature controllers are protected when sitting on your workbench. Ideal in systems with rapid, unpredictable, or complex temperature changes, they turn heating equipment on and off using a proportional-integral-derivative (PID) control algorithm to make fine adjustments, giving you the most precise and stable temperature control. All work similarly to proportional controllers but gather more variables to calculate the most effective way to return to the target temperature and avoid overshooting it. They also have fuzzy logic to learn your system's behavior and compensate as needed. Use the autotuning function to have the controller cycle and identify the ideal PID variables for your system. These controllers read temperature with a highly sensitive thermocouple probe in critical process applications. Since they reset automatically, they switch off and on again as the temperature fluctuates. Use the keypad to adjust the actuation point, reset point, and other settings.
The controllers have mechanical relay outputs that actuate circuits directly. All are single pole, single throw (SPST-NO) relays and turn one circuit from off to on (normally open).
Controllers with high-limit control let you attach a second thermocouple probe to take the temperature of your heating equipment. If your equipment reaches the high limit, these controllers shut down your heating equipment and won't let it turn back on until you manually reset it, improving the safety of your system.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/179/1797n105-@halfx_n8e0j_1713535771.png?ver=imagenotfound)
Mechanical Relay | ||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Thermocouple Probe Type | Total No. of Outputs | Output Type | Industry Designation | Max. Switching Current @ Voltage | Reset Type | Input Voltage | NEMA Style | Cord Lg., ft. | Ht. | Wd. | Dp. | Environmental Rating | Each | |
J—Heating K—High Limit | 1 | Heating—One Mechanical Relay | SPST-NO | 16 A @ 120 V AC | Automatic, Manual | 120V AC | 5-20 | 5 | 5" | 8 1/2" | 11" | IP50 | 00000000 | 000000000 |
K—Heating K—High Limit | 1 | Heating—One Mechanical Relay | SPST-NO | 16 A @ 120 V AC | Automatic, Manual | 120V AC | 5-20 | 5 | 5" | 8 1/2" | 11" | IP50 | 00000000 | 00000000 |