The Allen-Bradley 1771-IBD, also cataloged as the 1771-IBD Input Module, operates as a dedicated hardware component for 10-30 VDC field discrete signal sensing within PLC-5 I/O chassis platforms.
Hardware Specifications
Parameter
Specification
Model
1771-IBD
Brand
Allen-Bradley
Origin
USA / Global Manufacturing standard
Weight
1.10 lbs (0.50 kg)
Dimensions
Standard 1771 single-slot I/O module form factor
Operating Temp
0 to 60 deg C (32 to 140 deg F)
Power Consumption
Backplane current load: 130 mA
Input Voltage
10-30 VDC
Digital Inputs
16 points
Circuit Logic
Sinking (Source Load)
Wiring Arm
1771-WH
Lifecycle Status
Discontinued by Manufacturer (Discontinued 3/10/2020)
PLC-5 I/O Density Scaling & Backplane Bus Integration
Designed for high-reliability industrial control within Allen-Bradley PLC-5 racks, the 1771-IBD enables dense digital signal acquisition across 16 discrete channel circuits. The module incorporates optical isolation between field-side 10-30 VDC sinking circuits and internal logic, preventing electrical noise propagation into the chassis. Operating under deterministic scan profiles, the unit minimizes backplane bus communication velocity latency while maintaining continuous backplane current draw at 130 mA.
Frequently Asked Questions
Q: What wiring arm is required to connect field wiring to the 1771-IBD module?
A: The module utilizes the Allen-Bradley 1771-WH wiring arm, allowing field wiring to remain intact when swapping out the module.
Q: Can the 1771-IBD be inserted into the rack under power?
A: Removing or inserting the module while backplane power is applied can cause circuit disruption or memory faults. Power down the PLC-5 rack chassis prior to module removal or installation.
Field Installation Guidelines
Ensure main chassis rack power is completely shut off before inserting or removing the module.
Align the 1771-IBD card edge guide with the targeted slot card rails in the 1771 I/O chassis.
Slide the module firmly into the slot until the backplane connector fully seats into the chassis backplane.
Mount the 1771-WH wiring arm onto the pivot pins of the chassis slot and secure terminal connections.
Verify field DC power connections strictly adhere to the sinking logic (10-30 VDC input polarity) and proper earth grounding standards.
