The Allen-Bradley 1771 Analog Module 1771-NIS is an 8-channel PLC-5 input module. It provides 4-20mA current loop power for two-wire transmitters, operating in temperatures from 0 to 60°C.

Specifications

Part Number: 1771-NIS, PLC-5 series module.

Inputs: 8 channels for 4-20 mA current loops (sinking/sourcing).

Power: Supplies loop power for two-wire transmitters.

Backplane Current: Rated at 2.9 Amps.

Data Format: Supports BDC or Natural Binary.

Mounting: Rack-mountable, weighing 17.06 lbs.

FAQ

Q1: What is the function of the 1771-NIS module?

A1: It is an 8-channel current input module that provides loop power for 4-20mA signals to PLC controllers.

Q2: What is the module's backplane current and power dissipation?

A2: It draws 2.4A from the chassis backplane and dissipates 12W of total power.

Q3: What is the input resolution and impedance of the module?

A3: It has a high resolution of 330nA/bit and a maximum input impedance of 300 ohms.

Q4: How quickly does the module detect a sensor fault?

A4: It can detect an open input circuit in a maximum of 5 seconds.

Q5: What is the recommended operating environment?

A5: It operates optimally in temperatures from 0 to 60°C and up to 95% relative humidity (non-condensing).