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The 1797-OB4D is a non-isolated source output module that belongs to the 1797 series of analog modules. This module has been designed and manufactured by Allen-Bradley. The Allen-Bradley non-isolated source output module has 4 output channels that all make reference to a single supply with a yellow LED that indicates the output current state, which means that if the output is on, the LED will be activated. These 4 channels are updated every 2 milliseconds from the backplane. The Allen-Bradley 1797-OB4D non-isolated source output module has a power consumption of 7.5 Watts at 9 Volts and a power dissipation of 5 Watts. Its thermal dissipation is 17.07 BTU per hour and it operates at a voltage of 25 Volts DC.
ManufacturerRockwell Automation
BrandAllen-Bradley
Part Number/Catalog No.1797-OB4D
Product TypeFLEX Ex I/O Module
Outputs4
Output TypeNonisolated Sourcing
Load Range30-5000 ohms
Electronic ProtectionLead Break, Overload, and Short Circuit
Power Supply9.5V DC
Module Field-side Power Consumption7.5 W
Power Dissipation5 W
Thermal Dissipation17.07 BTU/hour
Conductors Wire Size4 mm^2
Weight200g
The Allen-Bradley 1797-OB4D non-isolated source output module features a fault indication function, and in this case, the status indicator will blink red for any fault that has been detected. This output module has the ability to detect short circuits and output wire off per channel by using a module data bit. The Allen-Bradley non-isolated source output module is electronically protected against short circuits and it can report faults directly to the controller. The recommended conditions for its use are an operating temperature range from 0 to 50 degrees Celsius and a relative humidity range of 5 to 95% without condensing. An altitude of 1000 meters is also recommended. The approximate dimensions of the 1797-OB4D module are as it follows: it has a width of 46 millimeters, a height of 94 millimeters, and a depth of 75 millimeters.
