1756-OB8: ControlLogix 24VDC 8 Channel Digital Output Module
The 1756-OB8 is the ControlLogix 24VDC 8 Channel Digital Output Module covered on this page. The attribute that decides whether it fits the existing installation without modification is 2.5 W @ 60 °C.
This configuration's controllogix 24vdc 8 channel digital output module is the attribute that drives the replacement decision. A processor or controller is selected on memory, scan time and platform compatibility before anything else. controllogix 24vdc 8 channel digital output module sets how much programme fits, how fast the logic executes and which I/O and networks the unit can host — the three things that decide whether an existing application migrates without a rewrite. Confirming 2.5 W @ 60 °C against the installed controller family is the check that prevents a processor that boots but cannot run the existing project.
| Feature | Specification |
|---|---|
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number | 1756-OB8 |
| Output Type | Digital DC output |
| Number of Outputs | 8 |
| Output Voltage Range | 10-30VDC |
| Nominal Voltage | 24VDC |
| Current per Point | 2 A @ 60 °C |
| Current per Module | 8 A @ 60 °C |
| Backplane Current | 165 mA @ 5.1VDC, 2 mA @ 24VDC |
| Total Backplane Power | 0.89 W |
| Power Dissipation | 2.5 W @ 60 °C |
| Isolation Voltage | 50V Continuous |
| Compatible RTBs | 1756-TBNH, 1756-TBSH. |
Related Configurations
Other published configurations in the same family — confirm the distinguishing specification against your installation:
| Related Part Number | Configuration Difference |
|---|---|
| allen-bradley-1756-ob8ei-controllogix-fused-isolated-output-module | confirm the configuration against your installation |
| allen-bradley-1756-ob8i-controllogix-isolated-dc-output-module | confirm the configuration against your installation |
Availability & Condition at AutoDCSTech
| Part Number | 1756-OB8 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
