Allen-Bradley 1756-IA16 ControlLogix Input Module | 16-Channel, 120V AC, 2 Groups, IP20 Specs

Allen-Bradley 1756-IA16 ControlLogix Input Module | 16-Channel, 120V AC, 2 Groups, IP20 Specs

Allen-Bradley 1756-IA16 ControlLogix digital input module specifications. 16-channel 120V AC input, 79-132V, 8 points/group, IP20. For industrial automation and control.

Product Overview

The Allen-Bradley 1756-IA16​ is a 16-channel 120V AC digital input module​ from the ControlLogix series, designed for industrial automation and control applications. This module accepts 16 AC input signals​ in the 79-132V AC range, organized in two isolated groups of 8 points. The "1756" designation indicates the ControlLogix I/O module series, "IA16" specifies the 16-channel AC input configuration. This module interfaces AC field devices such as switches, sensors, and contactors to ControlLogix programmable controllers, providing reliable input sensing for machine control, process automation, and manufacturing systems in high-performance applications.

Technical Specifications

Note: Specifications are based on Allen-Bradley 1756 series technical documentation. The "1756-IA16" model specifically indicates 16-channel 120V AC input configuration. Actual specifications may vary slightly depending on production batch.

Model Number Decoding (1756-IA16)

• 1756:​ Series designation (ControlLogix I/O module series)

• IA16:​ Module type (IA = AC input, 16 = 16 channels)

Note:​ The "IA" prefix indicates AC input functionality. The "16" suffix specifies 16 input channels. This module is designed for use in ControlLogix chassis (1756-A4, A7, A10, A13, A17) and requires a ControlLogix processor for operation.

Key Features

• 16 AC Input Channels:​ Accepts 16 discrete 120V AC input signals

• Dual Isolated Groups:​ Two electrically isolated groups (8 points per group)

• High-Speed Response:​ 15 ms maximum on/off delay

• Status Indicators:​ Individual LED indicators for each input point

• Removable Terminals:​ Spring clamp terminal blocks for easy wiring

• Wide Input Range:​ 79-132V AC operation (47-63 Hz)

• Industrial Grade:​ Designed for harsh industrial environments

• High Isolation:​ 1500V RMS isolation between field and logic circuits

• Compact Design:​ Single-slot module for high-density installation

• ControlLogix Compatibility:​ Direct integration with ControlLogix controller systems

• International Certifications:​ Multiple agency approvals for global use

Input Characteristics

Typical Applications

• Machine Control:​ Limit switch, proximity switch, and pushbutton interfacing

• Process Automation:​ Sensor and detector input for manufacturing processes

• Material Handling:​ Conveyor control, position sensing, and safety interlock monitoring

• Packaging Machinery:​ Sensor inputs for filling, sealing, and labeling equipment

• HVAC Control:​ Thermostat, pressure switch, and flow switch monitoring

• Power Generation:​ Equipment status monitoring and protection circuits

• Water/Wastewater:​ Pump status, level switch, and valve position monitoring

• Automotive Manufacturing:​ Production line sensor inputs and machine guarding

• Oil and Gas:​ Process monitoring and equipment status inputs

• Pharmaceutical:​ Equipment status monitoring in controlled environments

Important Technical Notes

1. System Requirements:​ Requires ControlLogix chassis (1756-A4, A7, A10, A13, A17) and ControlLogix processor. Compatible with CompactLogix systems with 1769 adapter.

2. Input Voltage:​ Verify field devices operate within 79-132V AC range. Do not exceed 132V AC maximum.

3. Wiring Groups:​ Inputs are grouped as points 0-7 (group 0) and points 8-15 (group 1). Each group requires its own common connection.

4. Power Consumption:​ Each input point consumes approximately 8 mA. Consider total power when designing system.

5. Input Filtering:​ Built-in 15 ms filtering provides noise immunity. This limits response speed for fast signals.

6. Wiring:​ Use proper wire size (12-24 AWG) and follow NEC/IEC standards. Use separate conduit for AC and DC wiring.

7. Fusing:​ External fusing required for each input circuit as per local electrical codes and safety standards.

8. Environmental Conditions:​ Install in appropriate enclosure for protection. IP20 provides limited protection against dust and moisture.

9. Grounding:​ Proper grounding and isolation are critical for noise immunity and safety in industrial environments.

10. Module Configuration:​ Requires configuration in ControlLogix programming software (RSLogix 5000/Studio 5000) for proper operation.

Note: For complete installation guidelines, wiring diagrams, configuration instructions, and detailed technical data, consult the official Allen-Bradley 1756 Series Technical Manual. Always verify the exact model number configuration with the manufacturer, as notation variations may occur.