1771-NRB Allen-Bradley High Resolution Isolated Analog Module

Product parameters

Module type: High-resolution Isolated RTD Input Module (Series B)

Number of input channels: 8 floating differential input channels

Input signal type:

RTD type: Supports 100 Ω platinum (Pt, α=0.00385 or 0.003916), 120 Ω nickel (Ni), and 10 Ω copper (Cu)

Resistance input: 0 to 650 Ω

Temperature range (depending on the RTD type) :

Platinum 100 Ω (α=0.00385) : -200 to 870°C (-328 to 1598°F)

Platinum 100 Ω (α=0.003916) : -200 to 630°C (-328 to 1166°F)

Nickel 120 Ω : -80 to 320°C (-112 to 608°F)

Copper 10 Ω : -200 to 260°C (-328 to 500°F)

Resolution:

Temperature: 0.03°C (platinum and nickel), 0.3°C (copper)

Resistance: 10 mΩ/ bit (16-bit single-pole)

Accuracy (at 25°C)

Temperature: ±0.5°C (platinum and nickel), ±1.0°C (copper)

Resistance: ±0.1% (full scale)

RTD excitation current: 1 mA (typical value)

Input overvoltage protection: 140 VAC RMS (continuous)

Drift

Offset drift: ±25 mΩ/°C

Gain drift: ±50 ppm/°C

Channel isolation

Inter-channel isolation: 1000 VDC (continuous)

Input to backplane isolation: 1000 VDC (continuous)

Backplane current: 1.5A (5VDC)

Power consumption: Maximum 6 W

Heat dissipation: Maximum 20.5 BTU/ hour

Input bandwidth: 9 Hz (6-pole low-pass digital filter)

Maximum update time: 25 ms (8 channels)

Range threshold:

Underscale threshold: 0.9 Ω

Out-of-range threshold: 650 Ω

Calibration value: 1.00 Ω / 649.0 Ω

Operating temperature: 0 to 60°C (32 to 140°F)

Storage temperature: -40 to 85°C (-40 to 185°F)

Relative humidity: 5% to 95% (no condensation)

Environmental protection: Open equipment (IP00), which needs to be installed in an industrial environment that complies with EN/IEC 60664-1 pollution level 2, and is limited to Zone 2 environment only

Installation location:

Compatible with I/O racks such as 1771-A1B, A2B, A3B, A4B, etc

Occupy one slot

Wiring:

Connect using a remote terminal panel via a 6-foot or 15-foot cable

Wire specification: 14-22 AWG stranded or solid copper wire, with a maximum insulation thickness of 3/64 inches

Keying: The backplane connector keying is located between pins 26-28 and 32-34

Certification: Complies with standards such as UL, CSA, CE, and C-TICK

Status indication:

Green RUN indicator light: Normal operation

Red FLT indicator light: Fault status (such as open circuit, over-range/under-range)

Function

Multi-type RTD support:

Supports 100 Ω platinum (α=0.00385 or 0.003916), 120 Ω nickel, and 10 Ω copper RTD, covering a temperature range of -200 to 870°C.

Supports resistance input (0 to 650 Ω), suitable for non-temperature-related resistance measurement.

High resolution and accuracy

16-bit resolution (10 mΩ/ bit), temperature resolution 0.03°C (platinum/nickel) or 0.3°C (copper).

Accuracy: ±0.5°C (platinum/nickel) or ±1.0°C (copper), suitable for high-precision temperature monitoring.

Channel isolation

Provide 1000 VDC isolation between channels and input to the backplane to prevent signal interference and ground loops.

Remote Terminal Panel (RTP) support:

It is connected through 1771-RTP4 and cables (such as 1771-CAPR, 1771-CAP15), supporting cold junction compensation, resistor or fuse configuration, and simplifying wiring.

Rapid data collection

The 8-channel update time is 25 ms, and the 9 Hz low-pass digital filter ensures signal stability.

Diagnostic function:

Support open-circuit detection to identify RTD disconnection faults.

It provides over-range (>650 Ω) and under-range (<0.9 Ω) alarms, and the red FLT indicator light indicates the fault.

Power-on self-diagnosis, report the status of the module.

Modular design

It occupies one I/O rack slot and is compatible with PLC-5 processors (such as 1785-L80C) and power modules (such as 1771-P5).

Communicate with the PLC processor using block Transfer instructions (BTR/BTW).

Configuration flexibility: Configure the RTD type, range, temperature unit (°C/°F), and filtering parameters through RSLogix 5 or Studio 5000 Logix Designer.

Application scenarios

Process control: In the chemical, oil and gas, and pharmaceutical industries, it monitors the temperature of reactors, pipelines or storage tanks and supports PID regulation.

Industrial heating/cooling: In heat treatment furnaces, injection molding machines, and HVAC systems, control the temperature of heaters or coolers to ensure process stability.

Energy management: Monitor the temperature of transformers, generators or battery packs to prevent overheating.

Environmental monitoring: In cold storage, greenhouses or data centers, ensure that the temperature meets the requirements.

Manufacturing industry: In the automotive, food processing, and electronic assembly sectors, monitor the temperature of equipment to support quality control.

Resistance measurement: Collect resistance signals (such as strain gauges) in the laboratory to support high-precision testing.

Legacy system maintenance: Maintain the PLC-5 system (such as in conjunction with 1785-L80C and 1771-P5), or prepare for migration to ControlLogix.

Advantage Products:

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

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