Configured for auxiliary control circuit switching and load isolation in industrial control panels, the Allen-Bradley 700-CF310EJ (700-CF Control Relay) provides direct physical/electrical execution. Operating on a 24 VDC control circuit voltage, this unit features a 4-pole configuration (3 N.O. and 1 N.C. standard contacts) rated for continuous thermal currents up to 10 A. Electrical connection is implemented via heavy-duty screw terminals optimized for secure conductor clamping under industrial vibration profiles.
Hardware Specifications
Parameter
Specification
Model
700-CF310EJ
Brand
Allen-Bradley
Origin
United States / Global Manufacture
Weight
0.90 lbs (0.41 kg)
Dimensions
Standard Bulletin 700-CF Frame Size
Operating Temp
-25 to 60 deg C
Power Consumption
Low-power DC coil (24 VDC)
Contact Configuration
3 N.O. / 1 N.C. (Standard Contacts)
Thermal Current Rating
10 A
Control Circuit Voltage
24 VDC
Termination Type
Screw Terminals
Control Circuit & Switching Dynamics
The Allen-Bradley 700-CF310EJ features an optimized electromagnetic coil drive compatible with 24 VDC PLC output channels and solid-state drivers. Integrated surge suppression mechanisms minimize inductive back-EMF voltage spikes during coil de-energization, suppressing high-frequency transient interference on local backplane bus networks and nearby digital communication interfaces. The mechanical contact assembly supports precise switching cycles, guaranteeing reliable state execution under continuous industrial duty cycles.
Frequently Asked Questions
Q: What is the recommended terminal tightening torque for the field wire connections?
A: Screw terminals on the 700-CF series should be torqued in accordance with standard industrial specs, typically 1.0 to 1.2 Nm (9 to 10.6 lb-in), using stranded or solid copper wire rated for 75 deg C minimum.
Q: Can the 24 VDC coil be actuated directly by a standard PLC transistor output card?
A: Yes, the 24 VDC coil power dissipation profile allows direct control via standard 24 VDC sourcing PLC digital output cards, provided the channel current rating meets or exceeds the inrush current requirement of the relay coil.
Field Installation Guidelines
Mount the relay securely on a standard 35 mm DIN rail or directly to a backpanel utilizing designated mounting holes. Maintain a minimum separation clearance of 10 mm from surrounding thermal sources or high-voltage power components to facilitate ambient heat dissipation. All field wiring must be routed in shielded wire troughs separated from low-voltage sensitive analog sensor cables to eliminate electromagnetic cross-talk. Ensure that control voltage power supply conductors are properly grounded according to class 2 circuit guidelines.
