Configured for analog signal digitization in Allen-Bradley PLC-5 platforms, the Allen-Bradley 1771-IFE/C (1771-IFE Analog Input Module) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
1771: Universal I/O chassis-based hardware architecture for Allen-Bradley control systems.
IF: Analog input module design classification.
E: High-density configurable analog processing design.
C: Hardware revision C series designation.
Hardware Specifications
Parameter
Specification
Model
1771-IFE/C
Brand
Allen-Bradley
Origin
USA
Weight
0.95 lbs (0.43 kg)
Dimensions
Standard 1771 single-slot chassis module
Operating Temp
0 to 60 deg C
Power Consumption
3.75 W (750 mA at 5 VDC backplane draw)
Backplane Current
750 mA at 5 VDC
Input Channels
16 single-ended or 8 differential
Input Range
Selectable voltage or current
Resolution
12 bit
Interface
Block Transfer Interface
High-Density Analog Processing and Backplane Determinism
The 1771-IFE/C module scales analog processing density across PLC-5 architectures, converting field voltage and current signals into 12-bit binary words via Block Transfer operations. Interfacing directly with EtherNet/IP and remote I/O deterministic network structures, the internal signal conditioning circuitry suppresses field-side electrical interference, preserving backplane bus communication velocity and preventing data corruption across adjacent chassis slots.
Frequently Asked Questions
Q: What data transfer mechanism does the 1771-IFE/C use to send data to the PLC-5 processor?
A: The module relies on Block Transfer Read (BTR) and Block Transfer Write (BTW) instructions to exchange configuration data and input channel values across the backplane.
Q: How is channel wiring organized for the 1771-IFE/C analog input card?
A: The module can be jumper-configured to support either 16 single-ended channels for maximum point density or 8 differential channels for higher common-mode noise rejection.
Field Installation Guidelines
Turn off all backplane power to the 1771 chassis and de-energize external field loops prior to inserting or removing the 1771-IFE/C module.
Align the printed circuit board with the chassis slot guides, pushing the module until the top and bottom latching mechanism locks into place.
Terminate signal leads to the matching 1771 field wiring arm, connecting wire shields to a single earth ground point at the panel enclosure.
Keep analog signal cables separated from high-voltage AC conductors and inductive load lines to avoid electromagnetic interference.
