1756-IB16ISOE | Allen-Bradley | ControlLogix | DC Isolated SOE Input Module

Product Description

The Allen-Bradley 1756-IB16ISOE is a ControlLogix digital input module designed for sequence-of-events (SOE) applications. It provides 16 individually isolated DC inputs, enabling precise event capture with high-speed response. The module supports both sink and source configurations, making it versatile for industrial monitoring and control systems.

Technical Specifications

• Manufacturer: Allen-Bradley

• Product Line: ControlLogix

• Part Number: 1756-IB16ISOE

• Category: PLCs

• Weight: 0.44 lbs (0.20 kg)

• Module Type: Digital DC Isolated Input (SOE)

• Inputs: 16 isolated channels

• Input Voltage Range: 24–48 V DC (sink/source)

• Operating Voltage Range: 10–55 V DC

• Input Delay Time: 50 µs + selectable filter time

• Minimum Operating Current: 5.5 mA at 55 V DC

• Maximum Operating Current: 2 mA at 10 V DC

• Off-State Current (Max): 1.5 mA

• Power Dissipation: 5.5 W at 60 °C

• Backplane Current Draw:

• 275 mA @ 5 V DC

• 2 mA @ 24 V DC

• Terminal Blocks: 1756-TBCH, 1756-TBS6H (removable)

• Isolation Voltage: 75 V continuous; type-tested at 1200 V AC for 2 s

Features

• High-speed event capture with 50 µs response

• Individually isolated inputs for improved reliability

• Supports both sink and source wiring configurations

• Designed for sequence-of-events monitoring in critical applications

• Compatible with removable terminal blocks for simplified wiring

Application Scenarios

• Power System Monitoring: Event capture for fault detection and logging

• Industrial Automation: Precise input tracking for safety and control systems

• Critical Infrastructure: Sequence-of-events recording in energy and utility networks

FAQ

• Q: How many inputs does the 1756-IB16ISOE provide?  A: Sixteen individually isolated DC inputs.

• Q: What is the input delay time?  A: 50 microseconds plus selectable filter time.

• Q: Which terminal blocks are compatible?  A: 1756-TBCH and 1756-TBS6H.

• Q: What isolation voltage is supported?  A: 75 V continuous, tested at 1200 V AC for 2 seconds.

• Q: How does this compare to the 1756-IB16?  A: The 1756-IB16ISOE provides isolated inputs and SOE functionality, while the 1756-IB16 is a standard DC input module without event sequencing.