FEATURES
- Input Voltage: 24 VDC
- Number of Monitored Channels/Loops: 4
- End-of-Line Resistor: 4.7 k-ohm (supplied)
- Individual Fault Indicator allows for easy location of faults.
- Output Relay Contact: 3A @ 240VAC (resistive)
- DIN-Rail Mountable
Wire Break Detection
MR-4C / MR-4D / MR-4L / MR-4P – LINE MONITORING (WIREBREAK) RELAY MODULE
The MR-4C / MR-4D / MR-4L / MR-4P Line Monitoring (Wirebreak) Relay is a supervisory module which continually monitors the status of the field wiring by monitoring the current passing through the supervised loop. Each loop has a End-Of-Line Resistor (EOLR) placed at the end of the loop. When the wire in any of the four channel breaks, the current flowing through the loop is disrupted and the module detects this as a open-circuit fault and energizes the fault relay(s).
Especially useful for systems which uses Normally Open (N/O) Pushbuttons. The MR-4x Wirebreak Detection Module is easy to interface to your existing circuit.
More than 20,000 in use worldwide!
APPLICATIONS
The MR-4C / MR-4D / MR-4L / MR-4P is commonly used to monitor signal loop continuity for applications such as:
- Monitoring of Normally Open (N/O) Emergency Stop Push-buttons
- Monitoring of Smoke Detectors
- Monitoring health of Solenoid Coil
- E-Stop Panels
- Electrical Switch Boards
- and more…
CONNECTION DIAGRAM
MR-4C
MR-4D
MR-4L
MR-4P
SPECIFICATIONS
| MR-4C | MR-4D | MR-4P | MR-4L | |
|---|---|---|---|---|
| Supply Voltage | 24 VDC | |||
| Power Consumption | 110 mA (max) | |||
| Ambient Operating Temperature | -10 to +50 degC | |||
| Monitoring Channels | 4 Circuits (each with 4k7 End-of-Line resistor). Individual fault LED allows for easy location of faults. | |||
| Output Contact | * 4 x N/C Relay Contacts (NC1, NC2, NC3, NC4, COM) * Power OFF = Relay OFF | * 4 x N/O Relay Contacts (NO1, NO2, NO3, NO4, COM) * Power OFF = Relay OFF | * 1 x Common Relay Contact (NO, NC, COM) * Power OFF = Relay OFF | * 1 x Common Relay Contact (NO, NC, COM) * Power OFF = Relay OFF |
| Mounting | DIN-Rail Mountable Enclosure | |||
| Weight | 300 g | |||
| Dimensions | H112 x W55 x D74 mm | |||
DIMENSIONS
ORDERING INFORMATION
- MR-4C – 4-Channel Line Monitoring (Wirebreak) Module with 4 x N/C Relay Contacts (c/w 4 x 4k7 resistor)
- MR-4D – 4-Channel Line Monitoring (Wirebreak) Module with 4 x N/O Relay Contacts (c/w 4 x 4k7 resistor)
- MR-4L – 4-Channel Line Monitoring (Wirebreak) Module (c/w 4 x 4k7 resistor)
- MR-4P – 4-Channel Line Monitoring (Wirebreak) Module (c/w 4 x 4k7 resistor)
