Allen-Bradley 1756-IB32 Input Module

Allen-Bradley 1756-IB32 Input Module

Technical Specifications

• Brand: Allen-Bradley
• Series: ControlLogix
• Model: 1756-IB32
• Input Channels: 32 points
• Voltage Range: 10-31.2V DC
• Nominal Voltage: 24V DC
• Input Type: Sink configuration
• Operating Current: 2-5.5 mA
• Response Time ON: 380µs + filter time
• Response Time OFF: 420µs + filter time
• Power Dissipation: 6.2W maximum
• Backplane Current: 100mA @ 5.1V DC
• Terminal Blocks: 1756-TBCH, 1756-TBS6H

Input Characteristics

• High Density: 32 input points in single slot design
• Group Configuration: Two groups of 16 inputs each
• Current Consumption: 2mA minimum at 10V DC
• Off-State Leakage: 1.5mA maximum per point
• Inrush Current: 250mA decaying in 22ms
• Voltage Category: 12-24V DC sink operation

Performance Features

• Configurable Filtering: User-selectable filter times for noise immunity
• Fast Response: Hardware delays under 500 microseconds
• Flexible Timing: Multiple filter options from 0-18ms
• Diagnostic Capabilities: Comprehensive self-monitoring
• Communication Options: Configurable RPI and connection scheduling
• Fault Detection: Minor and major fault status monitoring

Installation & Wiring

• Slot Requirement: Single slot module
• Terminal Blocks: 36-pin 1756-TBCH or 1756-TBS6H
• Chassis Compatibility: All 1756 ControlLogix systems
• Backplane Power: 100mA at 5.1V DC requirement
• Thermal Management: 21.1 BTU/hour dissipation
• Enclosure Type: Open-style for cabinet installation

Configuration Options

• Filter Settings: 0, 1, 2ms for ON delay
• OFF Delay Options: 0, 1, 2, 9, 18ms selectable
• Communication Settings: Customizable RPI intervals
• Fault Reactions: Configurable communication failure response
• Module Inhibition: Selective module activation control

Application Examples

• Limit Switches: Position detection and machine sequencing
• Push Buttons: Operator interface and control commands
• Proximity Sensors: Object detection and presence sensing
• Safety Devices: Emergency stop and guard monitoring
• Process Signals: Status monitoring and interlocking

Frequently Asked Questions

How many input points does this module have?

• The 1756-IB32 provides 32 discrete input points in a single slot.

What voltage range does it support?

• It operates from 10 to 31.2 volts DC with 24V DC nominal rating.

What are the configurable filter times?

• ON delays: 0, 1, 2ms. OFF delays: 0, 1, 2, 9, 18ms options available.

What terminal blocks are required?

• Use 1756-TBCH or 1756-TBS6H 36-pin removable terminal blocks.

How fast is the response time?

• Hardware response is 380µs ON and 420µs OFF plus selected filter time.

Can it be used in distributed systems?

• Yes, it works in local, remote, and PlantPAx DCS applications.

What diagnostics are available?

• Module status, fault detection, and backplane monitoring capabilities.

For technical specifications and purchasing information, contact: sales@nex-auto.com