PRODUCT INFORMATION
Product Overview
The Allen-Bradley 1770-P1 is a stand-alone Power Supply designed for the PLC-5 control architecture. It provides regulated direct-current power to compatible 1771 I/O modules requiring external DC power. The unit supports auxiliary hardware such as LED numeric displays and thumbwheel switches. Internal current-limiting circuits protect downstream components from abnormal current conditions.
This power supply accepts nominal AC inputs of 120 Volts AC or 220 to 240 Volts AC. It converts incoming AC line power to lower DC operational levels. Jumper configurations allow selection between line input levels and DC output distributions. The supply delivers +5 Volts DC at 300 milliamperes and ±15 Volts DC at 150 milliamperes.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
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| Category | PLCs |
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| Frequency | 50-440 Hertz |
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| Input Voltage Range | 105-225 or 205-250 Volts AC |
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| Location | Stand-Alone |
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| Max Apparent Input Power | 37 VA |
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| Max Real Input Power | 20 Watts |
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| Max Xformer Load | 50 VA |
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| Module Type | Power Supply |
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| Nom Input Voltage | 120 or 220/240 Volts AC |
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| User Output Current | 300 Miliamperes (at 5 Volts DC), 150 Miliamperes (at +/- 15 Volts DC) |
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| Weight | 1.31 lbs (0.60 kg) |
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TECHNICAL INFORMATION
Features
- Stand-alone mounting format for external power delivery.
- Dual nominal AC voltage inputs supporting 120 VAC and 220/240 VAC.
- Regulated DC outputs providing +5 VDC and ±15 VDC.
- Internal current-limiting design to prevent overcurrent damage to connected modules.
- Configurable terminal jumpers for supply voltage and output selection.
TECHNICAL INFORMATION
Applications
- External DC power distribution for Allen-Bradley 1771 I/O modules.
- Excitation power for analog input modules requiring dedicated external DC voltage.
- Panel interface devices including thumbwheel switches and LED numeric displays.
TECHNICAL INFORMATION
Connections / Interfaces
- Dedicated screw terminals for incoming AC line power connection.
- Jumper-selectable terminals for 120 VAC or 220/240 VAC input operation.
- Regulated direct-current output terminals for +5 VDC and ±15 VDC circuits.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the unit as a stand-alone power supply in an appropriate industrial enclosure.
- Verify jumper orientation prior to energizing line voltage connections.
- Use direct terminal connections or configured jumpers according to the required input voltage.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure input jumper links for 120 VAC operation across designated terminals.
- Leave terminals open without jumpers for 220 to 240 VAC input selection.
- Verify jumper settings for +5 VDC and ±15 VDC load requirements.
TECHNICAL INFORMATION
Compatibility
- Allen-Bradley 1771 series I/O modules requiring external direct-current power.
- 1771 analog input modules operating with external auxiliary supply voltages.
- External industrial thumbwheel switches and LED numeric display panels.
TECHNICAL RESOURCES
Documentation
COMPATIBILITY
Compatibility & Replacement
COMPATIBLE MODELSAllen-Bradley 1771 series I/O modules requiring external direct-current power. 1771 analog input modules operating with external auxiliary supply voltages. External industrial thumbwheel switches and LED numeric display panels.
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 primary function of the Allen-Bradley 1770-P1?
The 1770-P1 supplies external regulated direct-current power to 1771 series modules, analog inputs, displays, and switches.
What input voltages does the 1770-P1 accept?
The module accepts 120 VAC or 220 to 240 VAC across a 50 to 440 Hz frequency range.
What are the DC output current ratings for the 1770-P1?
It provides 300 milliamperes at +5 Volts DC and 150 milliamperes at ±15 Volts DC.
What is the indicative market price for the 1770-P1?
Market reference pricing ranges between $376.00 and $528.03 USD. Indicative market reference only; not a final quotation.
