PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1746-P1 is an SLC 500 chassis power supply. It provides backplane electrical power to modules installed within an SLC 500 chassis. This unit accepts AC input voltages from 85 to 132 VAC or 170 to 265 VAC. It operates over an input frequency range of 47 to 63 Hertz. The power supply supports an internal current capacity of 2 A at 5 VDC. It also supplies 0.46 A at 24 VDC to the chassis backplane.
This hardware mounts directly on the leftmost side of any 1746 chassis. It delivers auxiliary 24 VDC user power rated at 200 mA across 18 to 30 VDC. The typical line power requirement is 135 VA with an input power rating of 42 Watts. Isolation between input terminals and the backplane reaches 1800 VAC RMS for one second. The operating temperature spans from 0 to 60 degrees Celsius.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Backplane Current (24 Volts) | 0.46 Amps |
|---|
| Backplane Current (5 Volts) | 2 Amps |
|---|
| Category | PLCs |
|---|
| Frequency | 47 to 63 Hertz |
|---|
| Fuse Protection | 1746-F1 or equivalent |
|---|
| GTIN | 10662073521416 |
|---|
| Input Power | 42 Watts |
|---|
| Input Voltage | 120 to 220 Volts AC |
|---|
| Inrush Current | 20 Amps |
|---|
| Internal Current Capacity | 2 A at 5V dc 0.46 A at 24V dc |
|---|
| Location | 1746 Chassis |
|---|
| Module Type | Power Supply |
|---|
| Operating Temperature | 0 to 60 Celsius |
|---|
| Output Voltage Range | 18 to 30 Volts DC |
|---|
| UNSPSC | 32151706 |
|---|
| UPC | 10662073521416 |
|---|
| Weight | 1.31 lbs (0.60 kg) |
|---|
TECHNICAL INFORMATION
Features
- Configurable input voltage range supporting 85 to 132 VAC and 170 to 265 VAC operation.
- Internal backplane output capacity delivering 2 Amperes at 5 VDC and 0.46 Amperes at 24 VDC.
- Auxiliary 24 VDC user-power supply providing 200 mA across an 18 to 30 VDC range.
- Hold-up duration providing 20 milliseconds at full load and 3000 milliseconds at zero load.
- Integrated short-circuit fuse protection using a 1746-F1 fuse or equivalent rating.
TECHNICAL INFORMATION
Applications
- SLC 500 main chassis rack power distribution.
- SLC 500 expansion rack power supply.
- Remote input and output chassis backplane power.
TECHNICAL INFORMATION
Connections / Interfaces
- AC line power input terminal connections.
- Dedicated chassis backplane connector for DC power distribution.
- User-power output terminals providing 24 VDC at 200 mA.
TECHNICAL INFORMATION
Installation Guidelines
- Set the input voltage jumper before applying electrical power to the unit.
- Never alter the voltage jumper while energized because exposed pins carry hazardous voltages.
- Install the power supply unit in the leftmost slot of the 1746 chassis.
- Provide external branch circuit overcurrent protection not exceeding 15 Amperes.
- Derate total current capacity by 5 percent when ambient temperature exceeds 55 degrees Celsius.
TECHNICAL INFORMATION
Configuration Guidelines
- Select the jumper position matching either the 120 VAC or 220 VAC nominal line source.
- Verify the sum of connected module currents does not exceed backplane capacity.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley SLC 500 1746 modular chassis hardware.
- 1746-F1 replacement fuse assemblies.
TECHNICAL INFORMATION
Lifecycle / Replacement Information
- Replace failed internal protection components using the 1746-F1 fuse or an approved equivalent.
- Correct external overcurrent wiring conditions prior to clearing power faults and restarting.
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley SLC 500 1746 modular chassis hardware. 1746-F1 replacement fuse 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
Where is the 1746-P1 power supply installed in an SLC 500 rack?
The 1746-P1 mounts in the leftmost position of an SLC 500 chassis. Only one supply is used per chassis.
What is the CPU hold-up time for the 1746-P1 power supply?
The CPU hold-up time is 20 milliseconds under full load. At no load, the hold-up duration reaches 3000 milliseconds.
What replacement fuse does the Allen-Bradley 1746-P1 use?
The power supply uses part number 1746-F1 or an equivalent fuse to protect against internal short-circuit conditions.
