1756-OB8 - In Stock | Allen Bradley PLC ControlLogix

1756-OB8

Rated 4.9 with 5 reviews

DO Supply is NOT an authorized distributor for this manufacturer and therefore the manufacturer’s warranty does not apply. Product comes with DO Supply's 1-year warranty

Rockwell Disclaimer: The product is used surplus. DO Supply 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 DO Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply 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. DO Supply 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. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply 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.

Rockwell Disclaimer: The product is used surplus. DO Supply 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 DO Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply 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. DO Supply 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. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply 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.


credit cards accepted
better business bureau

1756-OB8

Revisions: Ser A 
Description: The Allen-Bradley 1756-OB8 is a ControlLogix discrete output module. It features Eight (8) 24VDC output channels in Two (2) groups of Four (4) channels each. Each channel delivers an output voltage range of 10-30VDC with nominal signal voltage of 24VDC. It is compatible for use with any ControlLogix chassis and uses the 1756-TBNH and 1756-TBSH Removable Terminal Block (RTB).
In Stock Ships Today
Request a quote for 1756-OB8

Description: The Allen-Bradley 1756-OB8 is a ControlLogix discrete output module. It features Eight (8) 24VDC output channels in Two (2) groups of Four (4) channels each. Each channel delivers an output voltage range of 10-30VDC with nominal signal voltage of 24VDC. It is compatible for use with any ControlLogix chassis and uses the 1756-TBNH and 1756-TBSH Removable Terminal Block (RTB).

DO Supply is NOT an authorized distributor for this manufacturer and therefore the manufacturer’s warranty does not apply. Product comes with DO Supply's 1-year warranty

Rockwell Disclaimer: The product is used surplus. DO Supply 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 DO Supply is not an authorized distributor of this product, the Original Manufacturer’s warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply 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. DO Supply 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. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply 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.

disclaimer
credit cards
better business bureau
Revisions: Ser A 

Warranty: 1 year DO Supply Warranty Included
Shipping: Worldwide shipping via UPS, DHL, and TNT
Repairs: We offer repair service for the 1756-OB8.
Exchange: Exchange credit for your defective unit available.
Conditions: We sell preowned surplus and refurbished parts.

To speak to a sales representative for pricing & lead time:


Rated 4.9 with 5 reviews

    Technical Specifications for 1756-OB8

ManufacturerRockwell Automation
BrandAllen-Bradley
Signal Delay, OFF Transition2 ms max
Signal Delay, ON transition1 ms max
Current per module, max8 A @ 60 °C (140 °F)
Current per point2 A @ 60 °C (140 °F)
No. of channels per group:Four (2)
No. of output groups:Two (2)
Output Voltage range10-30VDC
Output Voltage24VDC
No. of OutputsEight (8)
Backplane Current, 5.1VDC165 mA
Backplane Current, 24VDC2 mA
Total Backplane power0.89 W
Part Number/Catalog No.1756-OB8
SeriesControlLogix
Module TypeDigital DC output module
Removable Terminal Block (RTB)1756-TBNH 1756-TBSH
Outputs8-Point
Voltage12-24 Volts DC Source
Operating Voltage Range10-30 Volts DC
Maximum Output Current Rating-Point2 Amps at 60 degrees Celsius
Maximum Output Current Rating-Module8 Amps at 60 degrees Celsius
Power Dissipation (Max)2.5 Watts at 60 Celsius
Removeable Terminal Block(s)1756-TBNH, 1756-TBSH
Isolation Voltage50 Volts Continuous
EnclosureNone
UPC10612598171412
UPC10662468702994
ManufacturerRockwell Automation
BrandAllen-Bradley
Signal Delay, OFF Transition2 ms max
Signal Delay, ON transition1 ms max
Current per module, max8 A @ 60 °C (140 °F)
Current per point2 A @ 60 °C (140 °F)
No. of channels per group:Four (2)
No. of output groups:Two (2)
Output Voltage range10-30VDC
Output Voltage24VDC
No. of OutputsEight (8)
Backplane Current, 5.1VDC165 mA
Backplane Current, 24VDC2 mA
Total Backplane power0.89 W
Part Number/Catalog No.1756-OB8
SeriesControlLogix
Module TypeDigital DC output module
Removable Terminal Block (RTB)1756-TBNH 1756-TBSH
Outputs8-Point
Voltage12-24 Volts DC Source
Operating Voltage Range10-30 Volts DC
Maximum Output Current Rating-Point2 Amps at 60 degrees Celsius
Maximum Output Current Rating-Module8 Amps at 60 degrees Celsius
Power Dissipation (Max)2.5 Watts at 60 Celsius
Removeable Terminal Block(s)1756-TBNH, 1756-TBSH
Isolation Voltage50 Volts Continuous
EnclosureNone
UPC10612598171412
UPC10662468702994
s

About 1756-OB8

The Allen-Bradley 1756-OB8 is a ControlLogix discrete output module. This module delivers an ouput voltage range of 10-30 VDC with nominal value of 24VDC. It is used to energize electrical loads that operate in DC voltages as well as AC loads, used with an interposing circuitry.

The 1756-OB8 is a single slot module that occupies any available slot of the chassis except the left-most slot which is intended for the ControlLogix processor or ControlLogix communication adapter / scanner module. It is compatible acting as a local I/O component or as part of a distributed I/O system. It may be installed to any available 1756- ControlLogix chassis and operate along standard or power supply modules.

The 1756-OB8 has a backplane current draw of 165 mA at 5.1 VDC and 2 mA at 24VDC while the total backplane power is 0.89 W and power dissipation of 2.5 W @ 60 °C (140 °F) and thermal dissipation of 8.53 BTU/hr. Each channel of this output module can deliver up to 2 Amperes @ 60 °C (140 °F) and 8 Amperes @ 60 °C (140 °F) per module.

This module uses a Removable Terminal Block (RTB) for connecting each channel of the module to the electrical loads. Compatible RTBs are 1756-TBNH and 1756-TBSH while appropriate RTB keying is user-defined, mechanical keying.

It is entered in the hardware configuration where module parameters and properties can be further modified/ Some of these parameters are Request Packet Interval (RPI), filter time, module inhibition and many others.

This module uses a Removable Terminal Block (RTB) which can either be the 1756-TBNH or the 1756-TBSH (20 pins RTB). This module has the following communication formats available: rack optimization, listen-only - rack optimization, output data, listen-only output data, and scheduled output data. Pilot duty is also available for the 1756-OB8 module.

The 1756-OB8 module has a voltage category of 12/24 volts DC source and an operating range of 10 to 30 volts DC. Its current draw is 165 mA at 5.1V and 2 mA at 24V. It has a backplane power of 0.89 W, with a maximum dissipation of 2.5 W at 60 Degrees Celsius (140 degrees Fahrenheit), and a thermal dissipation of 8.53 BTU/hr. The maximum off-state leakage current of this module is 1 mA per point and during an on-state, it has a maximum voltage drop of 1.2V DC at 2 A. It also has a maximum current of 2 A per point at 60 Degrees Celsius and a maximum current of 8 A at 60 Degrees Celsius per module. Its surge current per point is 4 A for 10 ms each that is repeatable every 1 s at 60 Degrees Celsius and its minimum load current is 2 mA per point. The module's isolation voltage is continuous at 250V. This module also allows you to modify states in Fault Mode per point and states in Program Mode per point. The choices for both are Hold Last State, On, or Off, with 'Off' set as default. Temperature ranges for the 1756-OB8 module are 0 to 60 Degrees Celsius when in operation and -40 to 85 Degrees Celsius when not in operation. It also has a maximum surrounding air temperature of 60 Degrees Celsius and a non-condensing relative humidity of 5% to 95%.

FAQ for 1756-OB8

How many output channels does the 1756-OB8 have?


The 1756-OB8 has Eight (8) Output channels that delivers a nominal output voltage of 24VDC.

Does the module come with an internal fusing?


No. Internal fusing is not built-in to this module.

How many chassis slots does the 1756-OB8 occupy?


The 1756-OB8 only occupies a single slot of the chassis.

Technical Description of 1756-OB8

Allen Bradley ControlLogix DC Output Module with 8-Point Outputs

Repair Services for 1756-OB8

Type Lead Time Price Action
Repair Service 2-4 weeks $317cartAdd to Cart

Our highly skilled technicians can repair your ControlLogix 1756-OB8. All our repairs come with a 1 Year Warranty. Please contact us for additional information about our repair process.

Revisions for 1756-OB8

Please refer to the manual for more information about the 1756-OB8 such as the wiring diagrams, data sheets and migration or obsolescence details.

Revision Part # Also Known as Availability
1756-OB8 Ser A
1756-OB8/A, Series A, Rev A Request Quote
Common misspellings:
  • l756-OB8
  • 1756-0B8
  • 1756-O88
  • 1756-OBb
  • 1756OB8

Reviews for 1756-OB8

Internal Review

"The 1756-OB8 is a discrete output module from Allen-Bradley’s ControlLogix automation platform. This is a low density I/O module, having only Eight channels however, cost-effective for small automation application. For higher density I/Os, it is recommended to use higher-density module such as the 1756-OB16 or 1756-OB32 to maximize chassis slots. " -DO Supply Tech

Dimensions For 1756-OB8

Size
Input Type
Panel Cutout Height in mm
Panel Cutout Width in mm
Terminal Height in mm
Terminal Width in mm
Terminal Overall Depth in mm
Terminal Mounted Depth in mm

Dimensions For 1756-OB8

Resolutions For 1756-OB8

About

Technical Specifications for 1756-OB8

ManufacturerRockwell Automation
BrandAllen-Bradley
Signal Delay, OFF Transition2 ms max
Signal Delay, ON transition1 ms max
Current per module, max8 A @ 60 °C (140 °F)
Current per point2 A @ 60 °C (140 °F)
No. of channels per group:Four (2)
No. of output groups:Two (2)
Output Voltage range10-30VDC
Output Voltage24VDC
No. of OutputsEight (8)
Backplane Current, 5.1VDC165 mA
Backplane Current, 24VDC2 mA
Total Backplane power0.89 W
Part Number/Catalog No.1756-OB8
SeriesControlLogix
Module TypeDigital DC output module
Removable Terminal Block (RTB)1756-TBNH 1756-TBSH
Outputs8-Point
Voltage12-24 Volts DC Source
Operating Voltage Range10-30 Volts DC
Maximum Output Current Rating-Point2 Amps at 60 degrees Celsius
Maximum Output Current Rating-Module8 Amps at 60 degrees Celsius
Power Dissipation (Max)2.5 Watts at 60 Celsius
Removeable Terminal Block(s)1756-TBNH, 1756-TBSH
Isolation Voltage50 Volts Continuous
EnclosureNone
UPC10612598171412
UPC10662468702994
ManufacturerRockwell Automation
BrandAllen-Bradley
Signal Delay, OFF Transition2 ms max
Signal Delay, ON transition1 ms max
Current per module, max8 A @ 60 °C (140 °F)
Current per point2 A @ 60 °C (140 °F)
No. of channels per group:Four (2)
No. of output groups:Two (2)
Output Voltage range10-30VDC
Output Voltage24VDC
No. of OutputsEight (8)
Backplane Current, 5.1VDC165 mA
Backplane Current, 24VDC2 mA
Total Backplane power0.89 W
Part Number/Catalog No.1756-OB8
SeriesControlLogix
Module TypeDigital DC output module
Removable Terminal Block (RTB)1756-TBNH 1756-TBSH
Outputs8-Point
Voltage12-24 Volts DC Source
Operating Voltage Range10-30 Volts DC
Maximum Output Current Rating-Point2 Amps at 60 degrees Celsius
Maximum Output Current Rating-Module8 Amps at 60 degrees Celsius
Power Dissipation (Max)2.5 Watts at 60 Celsius
Removeable Terminal Block(s)1756-TBNH, 1756-TBSH
Isolation Voltage50 Volts Continuous
EnclosureNone
UPC10612598171412
UPC10662468702994

About 1756-OB8

The Allen-Bradley 1756-OB8 is a ControlLogix discrete output module. This module delivers an ouput voltage range of 10-30 VDC with nominal value of 24VDC. It is used to energize electrical loads that operate in DC voltages as well as AC loads, used with an interposing circuitry.

The 1756-OB8 is a single slot module that occupies any available slot of the chassis except the left-most slot which is intended for the ControlLogix processor or ControlLogix communication adapter / scanner module. It is compatible acting as a local I/O component or as part of a distributed I/O system. It may be installed to any available 1756- ControlLogix chassis and operate along standard or power supply modules.

The 1756-OB8 has a backplane current draw of 165 mA at 5.1 VDC and 2 mA at 24VDC while the total backplane power is 0.89 W and power dissipation of 2.5 W @ 60 °C (140 °F) and thermal dissipation of 8.53 BTU/hr. Each channel of this output module can deliver up to 2 Amperes @ 60 °C (140 °F) and 8 Amperes @ 60 °C (140 °F) per module.

This module uses a Removable Terminal Block (RTB) for connecting each channel of the module to the electrical loads. Compatible RTBs are 1756-TBNH and 1756-TBSH while appropriate RTB keying is user-defined, mechanical keying.

It is entered in the hardware configuration where module parameters and properties can be further modified/ Some of these parameters are Request Packet Interval (RPI), filter time, module inhibition and many others.

This module uses a Removable Terminal Block (RTB) which can either be the 1756-TBNH or the 1756-TBSH (20 pins RTB). This module has the following communication formats available: rack optimization, listen-only - rack optimization, output data, listen-only output data, and scheduled output data. Pilot duty is also available for the 1756-OB8 module.

The 1756-OB8 module has a voltage category of 12/24 volts DC source and an operating range of 10 to 30 volts DC. Its current draw is 165 mA at 5.1V and 2 mA at 24V. It has a backplane power of 0.89 W, with a maximum dissipation of 2.5 W at 60 Degrees Celsius (140 degrees Fahrenheit), and a thermal dissipation of 8.53 BTU/hr. The maximum off-state leakage current of this module is 1 mA per point and during an on-state, it has a maximum voltage drop of 1.2V DC at 2 A. It also has a maximum current of 2 A per point at 60 Degrees Celsius and a maximum current of 8 A at 60 Degrees Celsius per module. Its surge current per point is 4 A for 10 ms each that is repeatable every 1 s at 60 Degrees Celsius and its minimum load current is 2 mA per point. The module's isolation voltage is continuous at 250V. This module also allows you to modify states in Fault Mode per point and states in Program Mode per point. The choices for both are Hold Last State, On, or Off, with 'Off' set as default. Temperature ranges for the 1756-OB8 module are 0 to 60 Degrees Celsius when in operation and -40 to 85 Degrees Celsius when not in operation. It also has a maximum surrounding air temperature of 60 Degrees Celsius and a non-condensing relative humidity of 5% to 95%.

FAQ for 1756-OB8

How many output channels does the 1756-OB8 have?


The 1756-OB8 has Eight (8) Output channels that delivers a nominal output voltage of 24VDC.

Does the module come with an internal fusing?


No. Internal fusing is not built-in to this module.

How many chassis slots does the 1756-OB8 occupy?


The 1756-OB8 only occupies a single slot of the chassis.

Technical Description of 1756-OB8

Allen Bradley ControlLogix DC Output Module with 8-Point Outputs
Repairs
Type Lead Time Price Action
Repair Service 2-4 weeks $317cartAdd to Cart

Our highly skilled technicians can repair your ControlLogix 1756-OB8. All our repairs come with a 1 Year Warranty. Please contact us for additional information about our repair process.

Type Lead Time Price Action
Repair Service 2-4 weeks $317cartAdd to Cart

Our highly skilled technicians can repair your ControlLogix 1756-OB8. All our repairs come with a 1 Year Warranty. Please contact us for additional information about our repair process.

Revisions

Please refer to the manual for more information about the 1756-OB8 such as the wiring diagrams, data sheets and migration or obsolescence details.

Revision Part # Also Known as Availability
1756-OB8 Ser A
1756-OB8/A, Series A, Rev A Request Quote

Common misspellings:
  • l756-OB8
  • 1756-0B8
  • 1756-O88
  • 1756-OBb
  • 1756OB8
PDF
Reviews

Reviews for 1756-OB8

Internal Review

"The 1756-OB8 is a discrete output module from Allen-Bradley’s ControlLogix automation platform. This is a low density I/O module, having only Eight channels however, cost-effective for small automation application. For higher density I/Os, it is recommended to use higher-density module such as the 1756-OB16 or 1756-OB32 to maximize chassis slots. " -DO Supply Tech