1771-P7/C Allen-Bradley Power Supply Module

1771-P7/C Allen-Bradley Power Supply Module | New & Original Stock

Availability: 20 left in stock

Allen-Bradley 1771-P7/C 1771 PLC-5 I/O System Power Supply Module Configured for converting AC input into regulated DC backplane power in...

SKU: 1771-P7/C

Manufacturer: Allen Bradley
Product No.: 1771-P7/C
Product Type: Power Supply Modules
Product Origin: USA
Payment:T/T, Western Union
Weight: 1950g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1771-P7/C 1771 PLC-5 I/O System Power Supply Module

Configured for converting AC input into regulated DC backplane power in 1771 PLC-5 I/O System infrastructures, the Allen-Bradley 1771-P7/C (1771-P7 Power Supply Module) provides direct physical/electrical execution.

Suffix Breakdown & Model Matrix

1771-P7/A: Initial hardware revision with standard backplane components.
1771-P7/B: Second design revision featuring updated internal transformers.
1771-P7/C: Current hardware revision with enhanced component footprint for 120/220 VAC thermal management.
1771-P7/D: Final series production iteration with modified terminal block assembly.

Hardware Specifications

Parameter	Specification
Model	1771-P7/C
Brand	Allen-Bradley
Origin	United States
Input Voltage	120 VAC or 220 VAC
Input Frequency	47-63 Hz
Real Input Power	108 W maximum
Apparent Input Power	176 VA maximum
Transformer Load	270 VA maximum
Output Voltage	5 VDC
Current Capacity	16 A
Mounting	1771 I/O chassis slot
Operating Temp	0 to 60 deg C
Storage Temp	-40 to 85 deg C
Dimensions	315 x 115 x 159 mm
Weight	1.95 kg (3.99 lbs)
Power Consumption	108 W

Backplane Bus Communication Velocity and I/O Density Scaling

The 1771-P7/C supplies the required 5 VDC operating current directly across the chassis backplane to sustain backplane bus communication velocity across high-density digital and analog configurations. Stable regulation of the 16 A current capacity is necessary to avoid voltage drops during maximum I/O density scaling inside the 1771 rack. This ensures that the module firmware flash compatibility and logic execution times of adjacent PLC-5 processors remain deterministic under fluctuating load characteristics.

Frequently Asked Questions

Q: Can multiple 1771-P7/C modules be wired parallelly to increase the backplane current capacity?

A: No. Parallel connection of multiple 1771-P7/C units is strictly prohibited. Operating units in parallel can cause unequal load distribution, leading to processor memory loss or erratic machine behavior.

Q: How is the input voltage selection between 120 VAC and 220 VAC configured on the hardware?

A: Input voltage configuration requires matching the physical terminal connections or internal jumper settings specified by the revision schematics prior to energizing the module.

Q: What are the consequences of exceeding the 16 A current rating on the 5 VDC output?

A: Exceeding the 16 A capacity causes a voltage drop on the 5 VDC backplane rail, which forces the PLC-5 processor into a fault state and halts all local I/O communication.

Field Installation Guidelines

Electrostatic Discharge Protection: Personnel must wear grounded wrist straps and utilize static-shielded packaging during handling to prevent permanent damage to the internal semiconductor junctions.
Chassis Power Constraints: Ensure the 1771 I/O chassis total current draw does not exceed the 16 A limit at 5 VDC provided by the module. Sum the individual current demands of all populated modules to verify compliance.
AC Input Wiring: Use standard industrial wire Gauges rated for the maximum input load. Terminal screws must be torqued to specified nominal values to minimize terminal resistance.
Clearance for Thermal Dissipation: Maintain standard vertical and horizontal clearance boundaries around the 1771 chassis to permit passive convection cooling and prevent thermal degradation.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

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Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.