Configured for high-speed low-level voltage acquisition in Allen-Bradley PLC-5 chassis platforms, the Allen-Bradley 1771-IFM (1771-IFM 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.
M: Fast millivolt high-speed channel signal processing configuration.
Hardware Specifications
Parameter
Specification
Model
1771-IFM
Brand
Allen-Bradley
Origin
USA
Weight
1.30 lbs (0.59 kg)
Dimensions
Standard 1771 single-slot chassis module
Operating Temp
0 to 60 deg C (32 to 140 deg F)
Power Consumption
3.75 W (750 mA at 5 VDC backplane draw)
Backplane Current
750 mA at 5 VDC
Input Channels
8 channels
Input Type
Fast millivolt input
High-Density I/O Isolation and Backplane Determinism
The 1771-IFM module scales low-level millivolt measurement into PLC-5 architectures through rapid analog signal conditioning across 8 input points. Designed to operate within EtherNet/IP and remote I/O deterministic network topologies, the internal analog front-end shields sensitive low-voltage signals from high-frequency industrial noise, preserving backplane bus communication velocity while rapidly transmitting processed input words to the controller data table.
Frequently Asked Questions
Q: What is the backplane current draw for the 1771-IFM analog input module?
A: The 1771-IFM draws 750 mA (0.75 A) at 5 VDC directly from the 1771 chassis backplane power supply rail.
Q: Does the 1771-IFM support high-voltage or current loop inputs directly?
A: No, the 1771-IFM is specifically engineered for fast response millivolt-level signal processing across its 8 channels.
Field Installation Guidelines
Disconnect all 1771 chassis backplane power and de-energize external millivolt field sources before inserting or removing the module.
Slide the module into the designated 1771 chassis slot along the card guide rails until the top and bottom retaining latches lock into position.
Terminate field wiring to the designated 1771 field wiring arm, utilizing shielded twisted-pair wire to maintain millivolt signal integrity.
Connect signal wire shields to a single earth ground point at the enclosure side to prevent ground loops and high-frequency noise interference.
