Allen-Bradley 1746-IB16 SLC 500 Input Module | 16-Channel, 120V AC, 79-132V, 8-16 Points/Common Specs

Allen-Bradley 1746-IB16 SLC 500 Input Module | 16-Channel, 120V AC, 79-132V, 8-16 Points/Common Specs

Allen-Bradley 1746-IB16 SLC 500 digital input module specifications. 16-channel 120V AC input, 79-132V range, 8 points/common, IP20 protection. For industrial automation and control.

Product Overview

The Allen-Bradley 1746-IB16​ is a 16-channel 120V AC digital input module​ from the SLC 500 series, designed for industrial automation and control applications. This module accepts 16 AC input signals​ in the 79-132V AC range, organized in two groups of 8 points with common connections. The "1746" designation indicates the SLC 500 I/O module series, "IB16" specifies the 16-channel AC input configuration. This module interfaces AC field devices such as switches, sensors, and contactors to SLC 500 programmable controllers, providing reliable input sensing for machine control, process automation, and manufacturing systems.

Technical Specifications

Note: Specifications are based on Allen-Bradley 1746 series technical documentation. The "1746-IB16" model specifically indicates 16-channel 120V AC input configuration. Actual specifications may vary slightly depending on production batch.

Model Number Decoding (1746-IB16)

• 1746:​ Series designation (SLC 500 I/O module series 1746)

• IB16:​ Module type (IB = AC input, 16 = 16 channels)

Note:​ The "IB" prefix indicates AC input functionality. The "16" suffix specifies 16 input channels. This module is designed for use in SLC 500 chassis (1746-A4, A7, A10, A13) and requires an SLC 500 processor for operation.

Key Features

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

• Dual Commons:​ Two isolated commons for input grouping (8 points per common)

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

• Removable Terminals:​ Screw terminal blocks for easy wiring and maintenance

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

• Industrial Grade:​ Designed for harsh industrial environments

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

• Compact Design:​ Single-slot module for space-efficient installation

• SLC 500 Compatibility:​ Direct integration with SLC 500 controller systems

• Reliable Operation:​ Proven design with millions of installations worldwide

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

• Building Automation:​ Security system inputs, door status monitoring

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

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

• Food Processing:​ Equipment status monitoring and safety system inputs

Important Technical Notes

1. System Requirements:​ Requires SLC 500 chassis (1746-A4, A7, A10, A13) and SLC 500 processor. Not compatible with CompactLogix or ControlLogix systems.

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 (common 0) and points 8-15 (common 1). Commons must be connected to AC neutral.

4. Power Consumption:​ Each input point consumes approximately 6 mA. Consider total power when designing power supplies.

5. Input Filtering:​ Built-in 25 ms filtering provides noise immunity but limits response speed for fast signals.

6. Wiring:​ Use proper wire size (12-24 AWG) and follow NEC/IEC standards for industrial control 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 against dust, moisture, and contaminants. IP20 provides limited protection.

9. Maintenance:​ Periodically check connections, LED status, and input signals. Clean terminal blocks if corrosion is present.

Note: For complete installation guidelines, wiring diagrams, configuration instructions, and detailed technical data, consult the official Allen-Bradley 1746 Series Technical Manual. Always verify the exact model number configuration with the manufacturer, as notation variations may occur.