Allen-Bradley | 1771-NIS/B | 8-Channel Isolated Analog Input Module

Product Description

The 1771-NIS/B analog input module from Allen-Bradley is designed for PLC-5 controllers and the 1771 Series I/O platform. This unit provides 8 isolated current input channels, optimized for 4–20 mA signals, ensuring accurate measurement and reliable integration into industrial automation systems. Its isolated design enhances signal integrity, while the compact form factor allows efficient installation in control cabinets.

Technical Specifications

• Manufacturer: Allen-Bradley

• Model Number: 1771-NIS/B

• Product Type: Isolated Analog Input Module

• Compatible Systems: PLC-5 controllers, 1771 Series I/O

• Input Type: Current (isolated)

• Number of Inputs: 8 channels

• Input Range: 4–20 mA DC

• Operating Temperature: 0°C to +60°C

• Dimensions: 2.0 in × 6.0 in × 10.0 in (5.1 cm × 15.2 cm × 25.4 cm)

• Weight: 1 lb 13 oz (0.8 kg)

Key Features

• Isolated Channels: Prevents interference and ensures accurate signal acquisition

• Current Input Design: Specifically tailored for 4–20 mA signals

• Compact Build: Fits easily into PLC-5 and 1771 Series systems

• Reliable Performance: Maintains accuracy across industrial operating conditions

Application Scenarios

• Chemical and petrochemical process monitoring

• Power generation instrumentation

• Water treatment and distribution automation

• Manufacturing systems requiring precise current input

FAQ

Q: How many input channels does the 1771-NIS/B provide?  A: It supports 8 isolated analog input channels.

Q: What type of signals can this module measure?  A: It is designed for 4–20 mA DC current signals.

Q: Which systems are compatible with this module?  A: It integrates with Allen-Bradley PLC-5 controllers and 1771 Series I/O systems.

Comparison with Similar Models

• 1771-NIS/A: Earlier version with similar specifications

• 1771-NIS/B: Updated design with improved isolation and reliability