PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-P5 is a DC-powered Power Supply Module for SLC 500 systems. It mounts directly into a 1746 chassis to deliver internal backplane operating power. The unit accepts a nominal input voltage of 125V DC within a 90 to 146V DC range. It provides an internal backplane output current of 5 A at 5V DC and 0.96 A at 24V DC.
This power module features an open-type enclosure and includes an integrated LED status indicator. It delivers 200 mA of auxiliary user power at an output range of 18 to 30V DC. Electrical isolation between backplane and input terminals is rated at 1800V AC RMS for one second. Operating temperature spans 0 to 60 degrees Celsius with derating applied above 55 degrees Celsius.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Category | PLCs |
|---|
| Product Line | SLC 500 |
|---|
| UPC | 662072006467 |
|---|
| Weight | 1.44 lbs (0.65 kg) |
|---|
| Module Type | Power Supply |
|---|
| Input Voltage | 125 Volts DC |
|---|
| Input Voltage Range | 90-146 Volts DC |
|---|
| Input Power | 85 Watts |
|---|
| Inrush Current | 20 amps |
|---|
| Output Voltage Range | 18-30 Volts DC |
|---|
| Frequency | DC |
|---|
| Backplane Current (5 Volts) | 5 amps |
|---|
| Backplane Current (24 Volts DC) | 0.96 amps |
|---|
| Location | 1746 Chassis |
|---|
| Operating Temperature | 0-60 Celsius |
|---|
TECHNICAL INFORMATION
Features
- Accepts nominal 125V DC input voltage with an operating range from 90 to 146V DC.
- Supplies backplane current ratings of 5 A at 5V DC and 0.96 A at 24V DC.
- Delivers 200 mA auxiliary user current across an 18 to 30V DC output range.
- Provides hold-up time of 20 ms at full load and 3000 ms at no load.
- Features built-in LED indicator for operational monitoring and status verification.
- Includes non-replaceable soldered internal fuse for short-circuit protection against fire hazards.
TECHNICAL INFORMATION
Connections / Interfaces
- Input terminal block connects directly to 125V DC power source wiring.
- Internal backplane interface delivers regulated 5V DC and 24V DC power to chassis slots.
- Auxiliary user power terminals provide external 24V DC instrument loop power.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the module directly onto the dedicated power supply slot of a 1746 chassis.
- Ensure adequate vertical clearance around the open-type enclosure for cooling airflow.
- Derate internal backplane current capacity by 5 percent when ambient temperature exceeds 55 degrees Celsius.
- Verify DC input voltage polarity between 90 and 146V DC prior to applying power.
TECHNICAL INFORMATION
Configuration Guidelines
- Calculate total chassis backplane current draw to ensure loads remain within rated limits.
- Confirm 24V DC backplane module requirements do not exceed the 0.96 A threshold.
- Under user-power overcurrent conditions, 24V DC user output shuts down while the CPU continues operating.
- Clear any external short circuit or overcurrent condition to allow user power recovery.
TECHNICAL INFORMATION
Compatibility
- Compatible with Allen-Bradley SLC 500 modular automation systems.
- Installs directly into 1746 modular I/O chassis assemblies.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSCompatible with Allen-Bradley SLC 500 modular automation systems. Installs directly into 1746 modular I/O chassis assemblies.
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 is the input voltage rating for the Allen-Bradley 1746-P5?
The 1746-P5 operates on a nominal input of 125V DC with a range of 90 to 146V DC.
How much backplane current does the 1746-P5 provide?
It supplies 5 A at 5V DC and 0.96 A at 24V DC to the chassis backplane.
Can the internal fuse on the 1746-P5 be replaced in the field?
No, the internal fuse is soldered in place and provides protection against fire hazards.
What happens if an overcurrent event occurs on the user power supply terminals?
The 24V DC user power shuts down while the SLC 500 processor continues normal operation.
