Allen-Bradley 1771-RTP4 PLC 5 Remote Termination Panel

The Allen-Bradley 1771-RTP4, also cataloged as the 1771-RTP4 Remote Termination Panel, operates as a dedicated hardware component for field wiring distribution within PLC 5 platforms.

Hardware Specifications

Profinet / EtherNet/IP Deterministic Networks and Base Integration

The Allen-Bradley 1771-RTP4 provides physical-layer terminal separation between field instruments and the internal rack buses that communicate with upstream switches on Profinet / EtherNet/IP deterministic networks. The integrated circuit board leverages straight-through copper traces to minimize impedance drop across loop legs. By establishing a fixed termination point for current and voltage inputs, the panel normalizes analog signal boundaries before data translation occurs, maintaining structural deterministic timing and preventing signal attenuation during high-density I/O routing.

Frequently Asked Questions

Q: How does the lack of cold junction compensation affect application mapping on this model?

A: The hardware lacks cold junction compensation (CJC) circuits, meaning it cannot process direct thermocouple sensor signals. Temperature monitoring applications must use alternative termination hardware or handle analog conversion via external transmitter modules.

Q: Can this termination panel be mounted inside a separate enclosure from the primary 1771 I/O chassis?

A: Yes, this component is designed for stand-alone installation on a standard DIN rail. Connection to the main I/O chassis or wiring arm requires the 1771-PSCC 5.5 ft remote cable assembly to bridge the physical gap between field terminations and the rack electronics.

Q: What action must be taken if a transient overcurrent faults an input channel?

A: The panel contains a 3 A, 250 V normal-blow mechanical fuse. If an overcurrent event clears the fuse link, the fault must be isolated from the field wiring loop, and the physical component must be manually replaced to restore signal continuity.

Field Installation Guidelines

• DIN Rail Mounting Adjustment: Position the panel base onto a standard symmetrical DIN 1 or asymmetrical DIN 3 mounting rail. Engage the physical locking clips fully to secure the unit against vibration.
• Shield Ground Terminations: Terminate all analog instrument outer shield drain wires directly to the designated earth grounding bar within the panel enclosure to prevent high-frequency noise injection.
• Cable Strain Relief: Secure the 1771-PSCC 5.5 ft system cable using mechanical tie-wraps adjacent to the 1771-WF wiring arm to protect the plug contacts from structural pulling forces.
• Signal Run Segregation: Route current loop and voltage instrument wires through dedicated low-voltage wire trays, maintaining separation from high-voltage AC phase conductors to prevent cross-talk interference.