Overview
The Allen-Bradley 1771-RTP4 remote termination panel is an Allen-Bradley PLC 5 series general-use remote termination panel. It is used with N-series High-Resolution Analog I/O modules to provide a Remote Termination System and is designed for mounting on Standard DIN 1 and DIN 3 mounting rails. The 1771-RTP4 has straight-thru wiring and can be used with current input devices and voltage input devices as long as voltage input devices are accompanied by a resistor.
Key Features
- Supports up to 8 I/O modules
- 38 screw terminals and 2×25-pin female connectors with straight-thru wiring
- DIN rail mounting eliminates wiring between terminal strip and wiring arm; allows I/O removal or replacement without disturbing current loop
- 8-channel termination with voltage inputs, RTD, and voltage outputs
- Connects to N-Series I/O modules via two 1.8m (6ft) pre-fabricated 1771-NC6 cables
Technical Specifications
- Operating Temperature: 0–60°C
- Relative Humidity: 0–95% (non-condensing)
- Mounting: Standard DIN rail (Type 1 and Type 3)
- Termination Points: 38 screw terminals
- Connectors: 2× 25-pin D-subminiature female
- Max I/O Modules: 8
- Cable Length: 1.8 m (6 ft) standard with 1771-NC6
- Weight: 0.2 kg (0.5 lb)
- Dimensions: 75 mm × 138 mm × 58 mm (3.0 in × 5.3 in × 3.0 in)
- Wiring: Straight-thru configuration
- Applications: All except thermocouple (without compensation)
Typical Applications
The 1771-RTP4 is used with 1771-N series High-Resolution Analog I/O modules. It supports voltage inputs, RTD, and voltage outputs for most applications except thermocouple applications. Common uses include remote signal conditioning, distributed analog termination in larger control systems, and field-mounted wiring consolidation where space or cable length constraints exist.
Compatibility & Replacements
The 1771-RTP4 is specifically designed for the PLC-5 architecture and works exclusively with 1771-N series High-Resolution Isolated Analog I/O modules. It connects via two 1.8m (6ft) pre-fabricated 1771-NC6 cables. This panel is discontinued by manufacturer, making qualified surplus stock valuable for legacy system maintenance. No direct modern equivalent exists; replacement would require system redesign around contemporary Allen-Bradley CompactLogix or ControlLogix platforms with integrated I/O or external termination modules.
