Allen-Bradley 1756-PB75R ControlLogix DC Redundant Power Supply

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Manufacturer: Allen-Bradley
Product No.: 1756-PB75R
Country of origin:United States
Product Type: Redundant Power Supply
Barcode: 8537101190
Payment: T/T, Western Union
Weight: 1450g
Dimensions: 14.5 x 17.5 x 13.7 cm (W x H x D)
Shipping port: Xiamen
Warranty: 12 months

Description

The 1756-PB75R is a ControlLogix DC redundant power supply for redundant chassis power configurations. Two power supplies operate together through a redundant power supply chassis adapter.

The paired supplies automatically share the chassis load during normal operation. This arrangement maintains backplane power when one supply experiences an operational anomaly.

The module accepts a nominal 24V DC input. It provides regulated 1.2V DC, 3.3V DC, 5.1V DC, and 24V DC outputs to the ControlLogix backplane.

Visual status indicators show the operating condition of the supply pair. A solid-state annunciator relay supports external status monitoring through an input module.

The redundant system requires two power supplies, two redundant power cables, and one chassis adapter. The redundancy design covers power supply anomalies but excludes the chassis adapter and power cables.

Features

Redundant operation with two matched power supplies
Automatic chassis load sharing
Visual status indication for the supply pair
Solid-state relay for external supply-status monitoring
Separate annunciator connection for system diagnostics
Compatible with ControlLogix redundant power supply chassis adapters
Supports one-chassis and two-chassis redundant configurations
Open-style construction for enclosure installation
Redundancy coverage limited to power supply operational anomalies

Applications

Redundant ControlLogix chassis power
Continuous process control systems
Production line control systems
Machine control requiring power supply redundancy
Critical controller and I/O chassis
Process monitoring and supervisory control
Industrial systems requiring power status annunciation
Control cabinets requiring automatic load sharing

Ordering Information

Parameter	Information
Catalog Number	1756-PB75R
Unique Product Identifier	1756-PB75R
UPC	612598274246
Product Description	ControlLogix DC Redundant Power Supply
Estimated Lead Time	5 days
Country of Origin	Mexico

Redundant System Components

Catalog Number	Description	Required Quantity
1756-PB75R/A	Redundant DC power supply	2
1756-CPR2, 1756-CPR2D, or 1756-CPR2U	Redundant power supply cable, 0.91 m (3 ft)	2
1756-PSCA2, 1756-PSCA2K, or 1756-PSCA2XT	Redundant power supply chassis adapter	1
User-supplied wiring	Optional annunciator wiring, 10 m (32.8 ft) maximum	2

Technical Specifications

General

Parameter	Specification
Brand	Allen-Bradley
Catalog Number	1756-PB75R
Product Family	ControlLogix
Product Type	DC Redundant Power Supply
Input Voltage Type	DC
Redundant Operation	Supported
Chassis Load Sharing	Automatic
Enclosure Type Rating	None, open-style
Country of Origin	Mexico
Suitable for Safety Functions	No

Input and Output Ratings

Parameter	Specification
Nominal Input Voltage	24V DC
Input Voltage Range	18...32V DC
Maximum Input Power	110 W
Maximum Inrush Current	30 A
Maximum Output Power	75 W at 0...60 degC
Hold-Up Time	20 ms
Output Current at 1.2V DC	1.5 A
Output Current at 3.3V DC	4 A
Output Current at 5.1V DC	13 A
Output Current at 24V DC	2.8 A
Annunciator Power	90V DC for ATEX/IECEx
Annunciator Pilot Duty	Not rated

Electrical Isolation

Parameter	Specification
Isolation Voltage	250V continuous
Insulation Type	Reinforced insulation
Isolation Paths	Power input to backplane, power input to annunciator, and annunciator to backplane
Dielectric Type Test	3250V DC for 60 s

Mechanical Specifications

Parameter	Specification
Height	17.5 cm
Width	14.5 cm
Depth	13.7 cm
Approximate Weight	1.45 kg
Top Mounting Hole Diameter	1.1 cm and 0.55 cm
Bottom Mounting Hole Diameter	0.55 cm
Conductor Screw Torque	0.565 N.m (5 lb.in)

Chassis Compatibility

Parameter	Specification
Compatible Chassis	1756-A4
Compatible Chassis	1756-A7
Compatible Chassis	1756-A10
Compatible Chassis	1756-A13
Compatible Chassis	1756-A17

Wiring Specifications

Parameter	Specification
Power Conductor	2.5 mm2 (14 AWG) solid or stranded copper
Power Conductor Temperature Rating	90 degC or greater
Maximum Power Conductor Insulation	1.2 mm (3/64 in.)
Annunciator Conductor	0.25...2.5 mm2 (22...14 AWG) solid or stranded copper
Annunciator Conductor Temperature Rating	90 degC or greater
Maximum Annunciator Conductor Insulation	1.2 mm (3/64 in.)
Power Port Wire Category	Category 1
Annunciator Port Wire Category	Category 3
1756-CPR2 Connection Wire Category	Category 3

Environmental Specifications

Parameter	Specification
Operating Temperature	0...60 degC
Maximum Surrounding Air Temperature	60 degC
Nonoperating Temperature	-40...+85 degC
Relative Humidity	5...95%, noncondensing
Operating Vibration	2 g at 10...500 Hz
Operating Shock	30 g
Nonoperating Shock	50 g
North American Temperature Code	T4
ATEX Temperature Code	T4
IEC Temperature Code	T4

Electromagnetic Compatibility

Parameter	Specification
Emissions	IEC 61000-6-4
ESD Immunity	IEC 61000-4-2
ESD Contact Discharge	6 kV
ESD Air Discharge	8 kV
Radiated RF Immunity	IEC 61000-4-3
Radiated RF, 80...2000 MHz	10 V/m with 1 kHz sine wave, 80% AM
Radiated RF at 900 MHz	10 V/m with 200 Hz, 50% pulse, 100% AM
Radiated RF at 1890 MHz	10 V/m with 200 Hz, 50% pulse, 100% AM
Radiated RF, 2000...2700 MHz	3 V/m with 1 kHz sine wave, 80% AM
EFT/B Immunity	IEC 61000-4-4
EFT/B on Power Ports	+/-4 kV at 5 kHz
EFT/B on Annunciator Ports	+/-4 kV at 5 kHz
Surge Transient Immunity	IEC 61000-4-5
Surge on Power Ports	+/-1 kV line-line and +/-2 kV line-earth
Conducted RF Immunity	IEC 61000-4-6
Conducted RF Level	15 V rms from 150 kHz...80 MHz

DC Supply Voltage Variation

Parameter	Specification
Standard	IEC 61000-4-29
Short Interruption	10 ms on DC supply ports
Voltage Dip	60% for 100 ms
Voltage Dip	100% for 50 ms
Voltage Fluctuation	+/-20% for 15 min
Long Interruption	5 s on DC supply ports

Sustainability

Parameter	Specification
LCA Method	ISO 14040/44 compliant
Impact Assessment Method	EF 3.0 Environmental Footprint, ESPR aligned
Database	Ecoinvent 3.10
Use-Phase Electricity	European Average Grid Mix, EU-40
Cradle-to-Grave Impact	1.58E+03 kg CO2 eq
Cradle-to-Gate Impact	6.17E+01 kg CO2 eq
Recycled Product Material	3.98%
Independent Review	Third-party reviewed under ISO 14071 and the EU Product Environmental Footprint framework

Connections/Interfaces

Connection	Function
Power Input Ports	Accept the 18...32V DC supply input
Annunciator Ports	Connect the solid-state status relay to an input module
1756-CPR2 Connection	Connects the redundant power supply to the chassis adapter
1756-PSCA2 Interface	Funnels power from two redundant supplies to the chassis backplane
Backplane Output	Supplies regulated 1.2V DC, 3.3V DC, 5.1V DC, and 24V DC rails

The standard 1756-CPR2 cable has a 0.91 m length and a 12.7 cm bend radius. The 1756-CPR2D and 1756-CPR2U require 10.16 cm clearance beside the chassis adapter.

Installation Guidelines

Install two redundant power supplies for each redundant supply pair.
Connect each power supply to the chassis adapter with a separate redundant power cable.
Install one compatible chassis adapter for each redundant chassis power connection.
Use the 1756-PSCA2, 1756-PSCA2K, or 1756-PSCA2XT chassis adapter.
Maintain the specified bend radius or clearance for the selected power cables.
Use Category 1 routing for power conductors.
Use Category 3 routing for annunciator and 1756-CPR2 connections.
Use copper conductors rated for at least 90 degC.
Tighten conductor screws to 0.565 N.m.
Install the open-style supply inside a suitable industrial enclosure.
Connect optional annunciator wiring to an input module for remote status monitoring.
Limit annunciator wiring length to 10 m.
Confirm both supply status indicators before placing the system into service.
Do not treat the chassis adapter or power cables as redundant fault-covered components.

Compliance and Certifications

Certification	Specification
c-UL-us	UL Listed Industrial Control Equipment for the United States and Canada
Hazardous Location Listing	Class I, Division 2, Groups A, B, C, and D
CSA	CSA Certified Process Control Equipment
FM	FM Approved for Class I, Division 2, Groups A, B, C, and D
UKCA	Conforms to applicable UK EMC, electrical safety, explosive atmosphere, and restricted substance regulations
CE	EU EMC and Low Voltage Directive compliance
RCM	Australian Radiocommunications Act compliance
ATEX	II 3 G Ex ec IIC T4 Gc, UL 22 ATEX 2819X
IECEx	II 3 G Ex ec IIC T4 Gc, IECEx UL 22.0064X
UKEX	Increased safety "e", UL22UKEX2605X, Zone 2
KC	Korean broadcasting and communications equipment registration
EAC	TR CU 020/2011 and TR CU 004/2011
CCC	CCC 2020122309111830, 2020122309111998, and 2020122309113868

Key Features:

#ControlLogix #Redundant Power Supply

Product Documentation

Technical Datasheet (PDF) Complete specifications and technical drawings.

What components are required for redundant operation?

A redundant system requires two power supplies, two redundant power cables, and one compatible chassis adapter.

What input voltage does the power supply require?

The power supply accepts 18 to 32V DC, with a nominal input voltage of 24V DC.

How is the chassis load shared?

The two power supplies automatically share the chassis load during normal redundant operation.

How can supply status be monitored remotely?

A solid-state annunciator relay can be wired to an input module for external status monitoring and troubleshooting.

Does redundancy cover the cables and chassis adapter?

No. The redundant system is designed to address operational anomalies in the power supplies. The cables and chassis adapter are excluded.

Global Express Shipping

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Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).

For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Color pattern	Black
Country of origin	United States
Power source	DC Power

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Allen-Bradley 1756-PB75R ControlLogix DC Redundant Power Supply