Allen Bradley 1771-NBTC Analog Combination I/O Module

Feature & Principle

It is a discontinued high-resolution analog combined I/O module for Allen‑Bradley PLC‑5 1771 chassis. It collects analog signals from field transmitters and outputs analog control signals to actuators. It features high conversion precision, supports standard 4-20mA / 0-10V signal range, data exchange through 1771 backplane bus. It is widely reserved for old PLC‑5 system maintenance, and has no new production supply.

Specifications

Model: 1771-NBTC Brand: Allen Bradley (Rockwell) Platform: PLC-5, 1771 I/O chassis Type: High resolution analog combined module Signal: 4-20mA, 0-10V Lifecycle: Discontinued Application: Old chemical, power, water treatment PLC-5 control cabinet Certification: CE, UL

Components & Diagnostics

Signal conditioning circuit, A/D & D/A conversion chip, backplane interface circuit, terminal block, status LED. Common faults: signal drift, no input/output, backplane communication failure, channel damage.

Product Brief

1771-NBTC analog module, Rockwell PLC-5 series obsolete I/O spare widely used for old automation cabinet overhaul and replacement.