1756-OB8

The 1756-OB8 ControlLogix DC output module is manufactured by Allen-Bradley. The module comes with 8 available outputs with a maximum of 4 points per group. The module is IFM-fused and this is a protective feature for the outputs. The recommended quick-acting fuse for the 1756-OB8 is 5X20 millimeters 4A. This is supplied by the SOC P/N MQ2-4A for the 1756-OB8. There are various communication modules that comes with the 1756-OB8 and they include the rack optimization, output data, listen only, listen only output data, and also the scheduled output data. The 1756-OB8 also comes with a pilot duty feature.

The ControlLogix is a DC output module with 8 outputs and as stipulated, the module supports a voltage of 12 to 24 Volts DC with an operating voltage ranging between 10 to 30 Volts DC. The maximum output current rating point for the 1756-OB8 is 2 Amps at 60 degrees Celsius while the maximum output current rating module for the 1756-OB8 is 8 Amps at 60 degrees Celsius. The maximum power dissipation for the 1756-OB8 is 2.5 Watts at 60 degrees Celsius. The backplane current at 5 Volts stands at 165 mA while the backplane current at 24 Watts is 2 mA. The isolation voltage for the 1756-OB8 is 50 Volts continuous while the 1756-OB8 can be located on any slot within the chassis. The 1756-OB8 supports various modify states in Fault Mode per point and modify states in Program Mode per point. The choices for these modes include “hold last state,” “on,” and also the “off” state which is set as the default state. The recommended operating temperature range for the 1756-OB8 is 0 to 60 degrees Celsius while on idle state or when stored, the recommended storage temperature range is -40 to 85 degrees Celsius.