Detail ALLEN-BRADLEY-1794-OB16
Modules are available in densities ranging from 8 to 32 points.
Digital I/O modules cover a wide electrical range:
120V AC: input, output and isolated input, output modules; 8 and 16 point
220V AC: input and output modules; 8 and 16 point
5V DC: TTL input and output modules, 16 point
24V DC: input, output, and combination modules; sink or source; protected; electronically fused; diagnostic; 8, 16, and 32 point
48V DC: sink input, source output modules; 16 point
125V DC: sink input module; 16 point
Relay: sink/source, 8 point
Isolated inputs and outputs can be used in applications such as motor control centers, where individual control transformers are used.
Protected (P) outputs have electronic protection, which acts to shut the module down in reaction to a short circuit, overload, or over-temperature condition. Recovery from shutdown is automatic upon removal of the output fault. No fault status is provided to the processor.
Electronic fused (EP) module acts to open the output when a fault occurs. The "fuse" can be reset by operating a pushbutton, via software, or by cycling the input power. Fault status is provided to the processor.
Diagnostic (D) modules detect, indicate, and report the following faults:
open input or output field devices or wiring
shorted output field devices
shorted input or output wiring
reverse polarity of user supply wiring
Selectable input filter times from 1 60 ms.
LED for each channel indicating status of:
corresponding input device
output signal
Extreme environment (XT) versions of standard modules.
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