PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-IO4 SLC 500 Digital I/O Combination Module provides discrete interface capability within a single chassis slot. This unit incorporates two AC inputs alongside two relay contact outputs. The input circuits operate across a nominal voltage band of 85 to 132 Volts AC at 47 to 63 Hertz. The relay contact outputs switch loads ranging from 5 to 265 Volts AC or 5 to 125 Volts DC. The module supports a continuous current rating of 4 A across its switching contacts.
Backplane current consumption draws 0.030 mA at 5 Volts DC and 0.025 mA at 24 Volts DC. Operating ambient temperatures range from -25 to 60 degrees Celsius with relative noncondensing humidity between 5% and 95%. Nonoperating storage conditions tolerate -40 to 85 degrees Celsius. Mechanical shock resistance reaches 10 g, while operational vibration limits peak at 0.015 inches from 5 to 57 Hertz. The connection interface features self-lifting terminal plates capable of securing two 14 AWG field wires.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Applications | Combination 120 Volts AC I/O |
|---|
| Backplane Current | 25-30 milliamps |
|---|
| Category | PLCs |
|---|
| Current/Output (120 VAC) | 1.5 amps |
|---|
| Current/Output (24VDC) | 1.2 amps |
|---|
| Inputs | 2 |
|---|
| Module Type | Digital I/O Combination Module |
|---|
| Operating Voltage | 85-132 Volts AC |
|---|
| Outputs | 2 |
|---|
| Signal delay | 35-45 milliseconds |
|---|
| UPC | 662073521303 |
|---|
| Weight | 0.50 lbs (0.23 kg) |
|---|
TECHNICAL INFORMATION
Features
- Provides two discrete 120 Volts AC inputs.
- Offers two relay contact outputs switching AC or DC voltages.
- Operates across an input range of 85 to 132 Volts AC.
- Switches loads up to 265 Volts AC or 125 Volts DC.
- Includes front-mounted LED indicators displaying real-time input channel status.
- Features self-lifting pressure plates accepting up to two 14 AWG conductors.
TECHNICAL INFORMATION
Applications
- Small-scale machine control requiring low point count discrete I/O.
- Interfacing 120 Volts AC pilot devices to SLC 500 chassis systems.
- Mixed AC input sensing and relay actuator driving applications.
TECHNICAL INFORMATION
Connections / Interfaces
- Integrated terminal block with self-lifting pressure plates for wire retention.
- Terminals accept up to two 14 AWG field wiring conductors.
- Front-panel LED indicators display the operating status of each input circuit.
TECHNICAL INFORMATION
Installation Guidelines
- Route input power wiring separately from output field device cables to reduce interference.
- Ensure chassis power is completely disconnected before inserting the module into a slot.
- Maintain ambient operational temperatures within the rated limits of -25 to 60 degrees Celsius.
TECHNICAL INFORMATION
Compatibility
- Compatible with standard Allen-Bradley SLC 500 chassis backplanes.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with standard Allen-Bradley SLC 500 chassis backplanes.
Verify compatibility against the exact Part Number, revision and manufacturer documentation before ordering.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What input and output capacities does the Allen-Bradley 1746-IO4 provide?
The module provides two 120 Volts AC inputs and two relay contact outputs switching AC or DC voltages.
What wire gauge can be connected to the 1746-IO4 terminal block?
The terminal block has self-lifting plates that accept up to two 14 AWG (2 millimeter) conductors.
What are the operating vibration and shock ratings for this module?
The module withstands operating shock up to 10 g and vibration displacement of 0.015 inches at 5 to 57 Hertz.
