Overview
The Allen-Bradley 1771-IBD is a discrete DC input module from the 1771 product family, designed for the Allen-Bradley PLC-5 series. This module is a single slot width component that mainly features Sixteen (16) 10-30VDC discrete inputs channels. The 1771-IBD comes with Eighteen (18) LED status indicators that provides information regarding the module status and the signal status present at each input channel of the module. This module interfaces field signaling devices such as switches, sensors, and auxiliary contacts for legacy PLC-5 automation systems.
Key Features
- Sixteen (16) 10-30VDC discrete inputs channels
- Contains optoelectrical isolation to protect the system circuits from electrical transients
- Contains an input filtering feature to reduce electrical noise
- The 1771-IBD module has 1 green status indicator and 16 red status indicators for customer-side indication at the front panel
- Comes with a Field Wiring Arm with compatible replacement part number of 1771-WH
- Configurable fault mode (last state or reset) via jumper selection
Technical Specifications
The module features 16 inputs with Minimum On-state Voltage 10VDC and Maximum Off-state Voltage of 5VDC. The 1771-IBD requires a minimum input current of 4.5mA at 10VDC and 15mA at 30VDC while the Minimum Off-state Current of 2.0mA @ 5VDC.
Typical Applications
Discrete input modules such as 1771-IBD are typically used to interface field signaling devices such as switches, sensors, auxiliary contacts that represent the state of the process. It is especially compatible for use with ON/OFF; 1 or 0 or binary operating devices. The module is ideal for industrial automation, machine control, and process monitoring in legacy PLC-5 environments.
Compatibility & Replacements
Compatible With
- All 1771 I/O chassis except 1771-A1, -A2, and -A4
- Allen-Bradley PLC-5 control systems
- Allen-Bradley Universal I/O Chassis, 1771-A1B, 1771-A2B, 1771-A3B, or 1771-A4B
- Two-slot addressing mode (must be placed in even-numbered slots)
Replaces / Drop-In Replacement For
- 1771-IBD (equivalent part numbers: 96134475, 96134473)
- 1771-IBD/B (Series B variant)
Works With
- Field Wiring Arm 1771-WH
- Allen-Bradley PLC-5 processor modules
- Legacy discrete output modules (1771-OB, 1771-OBD series)
- EPICS software (two-slot addressing mode compatible)
