Voltage-Monitoring Relays
Safeguard your equipment against overheating, wear, and malfunction from a spike or dip in voltage. These relays continuously monitor your AC or DC power supply and trip when the voltage is outside a set range. Rated IP20, these relays have recessed terminals that keep fingers and other objects from touching live circuits. Mount them on a 35 mm DIN rail (also known as DIN 3 rail) for fast installation.
Relays have knobs right on the front where you can set your trip voltage. You can see that they're wired correctly and when they're actuated based on the LED indicators. If you want to mount these relays to a surface instead of DIN rail, they have mounting holes.
Relays with IO link can be programmed, monitored and reset remotely by connecting them to a programmable logic controller (PLC), human-machine interface (HMI), or computer. If you want to program them locally, they have a keypad.
Relays with spring-clamp terminals connect and disconnect to wire without screws. Because there’s no screw, these connections are less likely to loosen over time, even in high-vibration environments.
For technical drawings and 3-D models, click on a part number.
| Number of Terminals | Input Voltage  | Trip Voltage Setting | Trip Time, sec. | Reset Type | Switching Current @ Voltage | Max. Switching Voltage | Adjustment Style | Ht. | Wd. | Dp. | Features | Each | |
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
With Spring-Clamp Terminals | |||||||||||||
| 9 | 24V AC, 24V DC | 1-10V AC/DC 3-30V AC/DC 15-150V AC/DC | 0.1-30 | Automatic, Manual | 5 A @ 240 V AC 5 A @ 30 V DC | 250V AC 48V DC | Knob | 3.5" | 0.7" | 3.5" | LED Indicator | 00000000 | 0000000 |
| 9 | 24V AC, 24V DC | 20-200V AC/DC 30-300V AC/DC 60-600V AC/DC | 0.1-30 | Automatic, Manual | 5 A @ 240 V AC 5 A @ 30 V DC | 250V AC 48V DC | Knob | 3.5" | 0.7" | 3.5" | LED Indicator | 00000000 | 000000 |
| 9 | 120V AC, 240V AC | 1-10V AC/DC 3-30V AC/DC 15-150V AC/DC | 0.1-30 | Automatic, Manual | 5 A @ 240 V AC 5 A @ 30 V DC | 250V AC 48V DC | Knob | 3.5" | 0.7" | 3.5" | LED Indicator | 00000000 | 000000 |
| 9 | 120V AC, 240V AC | 20-200V AC/DC 30-300V AC/DC 60-600V AC/DC | 0.1-30 | Automatic, Manual | 5 A @ 240 V AC 5 A @ 30 V DC | 250V AC 48V DC | Knob | 3.5" | 0.7" | 3.5" | LED Indicator | 00000000 | 000000 |
Trip Voltage | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Number of Terminals | Input Voltage | Min. | Max. | Trip Time, sec. | Reset Type | Switching Current @ Voltage | Max. Switching Voltage | Adjustment Style | Ht. | Wd. | Dp. | Display Type | Features | Each | |
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT | |||||||||||||||
With Screw Terminals | |||||||||||||||
| 9 | 24V DC | 10V AC/DC | 600V AC/DC | 0-999 | Automatic | 3 A @ 240 V AC 1 A @ 24 V DC | 400V AC 250V DC | Keypad, External Controller | 3.6" | 0.9" | 3.6" | LCD | Remote Reset | 00000000 | 0000000 |
With Spring-Clamp Terminals | |||||||||||||||
| 9 | 24V DC | 10V AC/DC | 600V AC/DC | 0-999 | Automatic | 3 A @ 240 V AC 1 A @ 24 V DC | 400V AC 250V DC | Keypad, External Controller | 3.8" | 0.9" | 3.6" | LCD | Remote Reset | 00000000 | 000000 |