Allen-Bradley 1745-E106 Analog Expansion Unit

Configured for analog signal processing in Allen-Bradley SLC 100/150 platforms, the Allen-Bradley 1745-E106 (1745-E106 Analog Expansion Unit) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

Hardware Specifications

Allen-Bradley Technical Characteristics

• Backplane Bus Communication Velocity: Synchronizes digitized analog input values across the system expansion bus without causing cycle scan time degradation in the main processor.
• I/O Density Scaling: Integrates 4 direct analog measurement channels (0-10 VDC or 0-20 mA) into the base PLC controller architecture, featuring dual threshold setpoints per channel for local trip triggering.

Frequently Asked Questions

Q: Can the 1745-E106 expansion unit be hot-swapped while supply power is active?

A: No. Connecting or removing the interconnect interface while power is applied can damage internal backplane bus components and trip CPU fault limits.

Q: What analog signal standards are supported on the 4 input channels?

A: Each of the 4 input channels can be configured to process either 0-10 VDC voltage loops or 0-20 mA current loops.

Q: How are setpoints managed on the individual analog channels?

A: The module incorporates 2 adjustable local setpoints per input channel to evaluate threshold limits directly at the hardware layer.

Field Installation Guidelines

1. Isolate primary supply power (85-132 / 170-265 VAC) prior to installing or removing the 1745-E106 expansion chassis.
2. Secure the chassis to the mounting panel using standard fasteners to ensure adequate structural support and frame earth grounding.
3. Use shielded twisted-pair cabling for all 0-10 VDC and 0-20 mA analog input runs, grounding the shield at a single end to eliminate ground loop interference.
4. Maintain a 2.0 in (50.8 mm) minimum clearance around the perimeter of the expansion unit inside the cabinet for proper thermal convective cooling.