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1756-OB8 Allen Bradley Rockwell Digital DC Output Module

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1756-OB8 Allen Bradley Rockwell Digital DC Output Module

1756-OB8 Allen Bradley Rockwell Digital DC Output Module

1756-OB8 is a digital output module from the ControlLogix product family.

HS CODE : 8538909200

  • Product No :

    1756-OB8 1756OB8
  • Manufacture :

    Allen Bradley
  • Size (cm) :

    22 * 18 * 5
  • Weight (kg) :

    0.35
  • Origin :

    USA
  • Warranty :

    12 Month
  • Lead Time :

    Ready Stock
  • Description :

    I/O Module

Product parameters

Product Model: 1756-OB8

Type: DC Digital Output Module

Output points: 8, divided into 2 groups (4 points in each group)

Output voltage range: 10-30V DC

Nominal voltage: 24V DC

Output current:

Each point: 2 A @ 60°C

Each group: 4 A @ 60°C

Total module: 8 A @ 60°C

Surge current: 4 A per point, lasting for 10 ms (repeatable every 1 second, @60 °C)

Minimum load current: 2 mA per point

Maximum off-state leakage current: 1 mA per point

Voltage drop in conduction state: Up to 1.2V DC@2 A

Power dissipation: Up to 2.5W at 60°C

Heat dissipation: 8.53 BTU/hr at 60°C

Output delay time:

OFF to ON: 1 ms (maximum)

ON to OFF: 2 ms (maximum)

Isolation voltage:

Channel to backplane: 250V (continuous), basically insulated, test voltage 1350V AC, lasting for 2 seconds

Inter-group isolation: 250V (continuous), test voltage 1350V AC, for 2 seconds

There is no isolation between channels (within the same group)

Wire size:

1756-TBNH: 0.33-2.1 mm² (22-14 AWG, single line), 0.33-1.3 mm² (22-16 AWG, Double line)

1756-TBSH: 0.33-1.3mm ² imagination line (22-16 AWG, single line)

Connector: 20-pin removable terminal block (RTB, such as 1756-TBNH or 1756-TBSH)

Operating temperature range: 0-60°C (32-140°F)

Storage temperature range: -40 to 85°C (-40 to 185°F)

Working humidity: 5-95% (no condensation)

Impact rating: 30G (in operation), 50G (not in operation)

Vibration level: 2G @ 10-500 Hz

Installation method: Install on ControlLogix racks (compatible with 1756-A4, A7, A10, A13, A17)

Certifications: CE, CSA, UL, FM, IECEx, ATEX, RCM, KC, EAC (as of April 15, 2025)

Temperature code: T4 (North American and ATEX standards)

Shell type: Open Enclosure

UPC: 10612598171412

Function

Dc output

It provides 8 DC output channels (2 groups, 4 points in each group), supporting 10-30V DC. It is suitable for controlling DC loads (such as relays, solenoid valves, indicator lights) or controlling AC loads through intermediate circuits.

Each point supports A current of 2 A, and the total current of the module can reach up to 8 A (at 60°C).

Status control

Supports Fault Mode and Program Mode at each point, which can be configured as ON, OFF or remain in the final state (default OFF).

Support Scheduled Outputs, with a synchronization time of up to 16.7 seconds.

Diagnosis and Monitoring

The LED indicator light shows the output status, communication status and module health status.

No electronic fuse or advanced diagnostic functions (such as open circuit/load loss detection of 1756-OA8D).

Network integration

Communicate with the ControlLogix controller via ControlNet or EtherNet/IP network, supporting local or distributed I/O architecture.

Supports hot plugging (RIUP), which is convenient for maintenance and replacement.

Software configuration: Configured using Studio 5000 Logix Designer software, it supports point-level configuration, communication formats (rack optimization, direct connection, scheduling output, listening output), and Add-On Profiles (AOP).

Fuse protection: No built-in fuse. It is recommended to use a 5x20mm, 4A fast fuse (SOC P/N MQ2-4A) protection module.

Application scenarios

Industrial automation control

Control DC equipment in the production line, such as solenoid valves, relays, indicator lights or small DC motors, suitable for manufacturing, automotive assembly and packaging systems.

Process control

In the petrochemical, power or water treatment industries, drive DC loads such as pumps, valves or alarm devices.

High inrush current support (4 A, 10 ms) is suitable for starting high-impact loads.

Distributed control system: It is integrated into large-scale factory automation systems as a remote I/O component through ControlNet or EtherNet/IP networks.

Cost-sensitive scenarios: Compared with high-density modules (such as 1756-OB16, 1756-OB32), 1756-OB8 is suitable for small-scale, low-density applications and has a lower cost.

General DC load control: Suitable for controlling alarms, buzzers or contactors, and widely used in factory automation.

Advantage Products:

DANFOSS VLT® AutomationDrive,Plus+1®,MCP
KEYENCE KV-800,KV-300,KP-3000,KP-7000,KJ,KV-Nano,HMI
GE FANUC PACSystems RX3i,90-30,90-70
SCHNEIDER Modicon M340,Modicon M580,Modicon X80,Pioneer
BENTLY NEVADA 3500/94,3500/53,3500/22M,3500/42M,330180-90-00
HONEYWELL Experion® PKS,ControlEdge™ ,HC900
ALLEN BRADLEY CompactLogix,ControlLogix, MicroLogix,Flex I/O
WESTINGHOUSE Westinghouse Modbus,Westinghouse 9080,Westinghouse 8000,Westinghouse 1000

All items are Distributor Ready-stock Genuine Brand-new Supplying, please inform us if the other conditions are needed, Used, Open-box, Refurbished, etc.

Many Available just wait for you, feel free to ask to get better deal!!!

Bou L(Sales Manager)            

Tel:+86-175 5077 6091                                                                                              

E-mail:[email protected]       


Tina(Sales Specialist)       

Tel:+86-131 2336 8748                                                                                                            

E-mail:[email protected]     


Ricardo(Sales Specialist)       

Tel:+86 18359251915                                                                                                      

E-mail:[email protected]

 

Doris(Sales Specialist)       

Tel:+86 13599531915                                                                                                      

E-mail:[email protected] 

Conditions

Original Brand New

Approximate Lead Time

3-5 days

Warranty

One Year

Online Service

24 / 7

Express Company

DHL / FedEx / UPS / TNT etc.

MOQ

1 Piece

TZ Tech is not an authorized surplus dealer or affiliate for the Manufacturer of this product.
The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because TZ Tech is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply.
While many PLC products will have firmware already installed, TZ Tech makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application.

TZ Tech also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source.
TZ Tech also makes no representations as to your right to install any such firmware on the product.
TZ Tech will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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Copyright 2025 @ TZ TECH Co., LTD. .All Rights Reserved Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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