Choosing an Electrical Switch
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Rotary Switches
Control multiple devices with one switch. Turn the shaft to change switch positions. Each position closes a set of contacts per circuit, so you can select between multiple devices on one or more circuits.
Switches for 13/32" panel cutout diameter require a knob.
Shaft | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. of Circuits Controlled | Switch Action | No. of Positions | No. of Terminals | Dp. Behind Panel | O'all Dia. | Lg. | Dia. | Each | ||
Plastic | ||||||||||
With Tab Terminals for 13/32" Panel Cutout Dia. | ||||||||||
| 4 | Stays Switched (Maintained) | 3 | 16 | 13/16" | 1" | 1 1/2" | 1/4" | 2.5 A @ 125 V AC, 0.35 A @ 125 V DC | 00000000 | 000000 |
Safety Relays
Receive signals from safety monitoring relays or controllers to switch devices off and on because of a system failure. Also known as force-guided or mechanically linked contacts, the interlocking opposing contacts on these relays cannot be open or closed at the same time. To keep your system from receiving false switching signals, the interlocking opposing contact must remain open even if a contact welds closed.
IP20 rated, they have recessed terminals that prevent fingers and other objects from touching live circuits. These relays have been tested to safety standards that can help you achieve your system's PL (performance level) and SIL (safety integrity level). Choose a relay with a PL and SIL rating to meet the needs of your system. Higher ratings indicate greater safety protection. As your system becomes more complex, you generally require a higher safety protection level. Mount them to 35mm DIN rail (also known as DIN 3 Rail).
Relays that meet SIL2 are tested for applications with a probability of failure of 0.1% to 1%. They’re often used for emergency shutdowns, and fire, gas, and overpressure detection.
| Number of Terminals | Input Voltage | Control Current, mA | Switching Current @ Voltage | Max. Switching Voltage | Ht. | Wd. | Dp. | Features | Each | |
With Screw Terminals—DIN-Rail Mount | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
6 Circuits Controlled with 4 Off (Normally Open) and 2 On (Normally Closed)—6PDT-4NO/2NC | ||||||||||
| 16 | 120V AC | 10 | 6 A @ 240 V AC | 250V AC | 3.4" | 0.9" | 3.9" | Interlocked Opposing Contacts, Recessed Terminals, LED Indicator | 00000000 | 0000000 |
| 16 | 24V DC | 42 | 6 A @ 240 V AC | 250V AC | 3.4" | 0.9" | 3.9" | Interlocked Opposing Contacts, Recessed Terminals, LED Indicator | 00000000 | 000000 |
6 Circuits Controlled with 5 Off (Normally Open) and 1 On (Normally Closed)—6PDT-5NO/1NC | ||||||||||
| 16 | 24V DC | 42 | 6 A @ 240 V AC | 250V AC | 3.4" | 0.9" | 3.9" | Interlocked Opposing Contacts, Recessed Terminals, LED Indicator | 00000000 | 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.
| 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 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 | 0000000 |
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" | 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 |
3 Circuits Controlled | |||||||||||
3 Safety Outputs with 2 Off (Normally Open) and 1 Signal Output with 2 On (Normally Closed) | |||||||||||
| 16 | 24V DC | 4 A @ 230 V AC 4 A @ 24 V DC | 240V AC | 3.9" | 0.9" | 4.5" | Emergency Stops | PLe, SIL3 | __ | 0000000 | 000000 |
| 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 |