PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-IN16 SLC 500 Digital DC Input Module provides sixteen sinking input channels for industrial automation systems. This unit interfaces field devices operating at nominal 24 VDC or 24 VAC with the controller backplane. Each discrete channel detects voltage states within an operating range of 10 to 30 volts. The backplane current draw requires 0.085 A at 5 VDC during normal rack operation.
Individual channel LED indicators display active power status to simplify diagnostic monitoring and field troubleshooting. The module mounts directly into a single slot of any standard 1746 SLC chassis. It functions inside local processor chassis or within remote expansion racks through integrated backplane bus connectors. Signal delay measures 15 milliseconds for DC voltage and 25 milliseconds for AC voltage transitions.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| UPC | 662468092746 |
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| Weight | 0.81 lbs (0.37 kg) |
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| Operating Voltage | 24 Volts AC/DC Sink |
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| Module Type | Digital DC Input Module |
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| Voltage Range | 24 VDC / 24 VAC |
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| Inputs | 16 |
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| Signal delay | 15 or 25 milliseconds |
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| Backplane Current (5 Volts DC) | At 5 Volts DC: 0.085 A; |
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| Off State Current | 1 milliamps |
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| Signal delay, DC Voltage | 15 ms |
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| Applications | General Purpose 125 Volts DC Inputs |
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| Signal delay, AC Voltage | 25 ms |
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| I/O Connection | 1746-HT and 1746-HCA |
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| Nominal Input Current | 8 mA @ 24V DC; 8 mA @ 24V AC |
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| Step Response | 100 milliseconds in, 2.5 milliseconds out |
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| Watts Per Point | 0.35 |
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| Minimum Watts | 0.425 |
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| Total Watts | 6 |
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| Input Type | Digital DC (Sinking) |
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| Number of Inputs | 16 Points |
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| Input Voltage | 24 V DC nominal |
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| Signal Voltage Range | 15 - 30 V DC (ON state) |
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| Backplane Current | 0.085 A at 5 V DC |
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| Mounting | Chassis-based (SLC 500 rack) |
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| Operating Temperature | 0 - 60 °C (32 - 140 °F) |
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TECHNICAL INFORMATION
Features
- Sixteen discrete sinking input channels for 24 VDC and 24 VAC signals.
- Integrated status LEDs for direct channel-level operational and diagnostic feedback.
- Low backplane current consumption of 85 mA at 5 VDC.
- Hardware compatibility with 1746-HT and 1746-HCA field connection hardware.
- Direct single-slot installation across local and remote 1746 chassis racks.
TECHNICAL INFORMATION
Applications
- Interface discrete 24 VDC or 24 VAC field sensors with SLC 500 controllers.
- General-purpose industrial automation signal sensing in manufacturing machinery.
- Process monitoring systems using sinking digital field inputs.
TECHNICAL INFORMATION
Connections / Interfaces
- Field wiring connects through compatible 1746-HT or 1746-HCA wiring interfaces.
- Integrated male backplane connectors plug directly into 1746 chassis bus slots.
TECHNICAL INFORMATION
Installation Guidelines
- Insert the module into any available slot within an SLC 500 chassis.
- Ensure alignment with chassis card guides before pressing into backplane connectors.
- Maintain ambient operating temperatures between 0 and 60 degrees Celsius.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure sixteen discrete input points in the SLC 500 controller I/O rack image.
- Account for 15 ms DC or 25 ms AC filter delay in program timing logic.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley SLC 500 1746 chassis racks.
- Field interface hardware including 1746-HT and 1746-HCA connections.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley SLC 500 1746 chassis racks. Field interface hardware including 1746-HT and 1746-HCA connections.
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 voltage range does the 1746-IN16 module accept?
The module operates with 24 VDC or 24 VAC nominal sinking inputs across 10 to 30 volts.
What is the signal delay for the 1746-IN16 input channels?
Signal delay is 15 ms for DC signals and 25 ms for AC voltage transitions.
How much backplane current does the 1746-IN16 draw?
The module draws 85 mA at 5 VDC from the SLC 500 chassis backplane.
What is the reference market price for the 1746-IN16 module?
Observed market reference pricing is approximately 119.00 USD. This figure is indicative market reference pricing only and is not a final quotation.
