Digital Output - Emerson Rosemount 370XA System Reference Manual

370XA Gas Chromatograph
APRIL 2014
Figure 3-1. Wiring diagram for a digital input connected to a contact closure
device.
Figure 3-2. Wiring diagram for a digital input connected to a voltage output
device such as a flow computer.
3.12.2

Digital output

The digital output is a Form C dry contact relay output with normally
open and normally closed contacts. The output is typically configured
as an alarm output, but can be configured for other purposes. When
using the digital output as an alarm output, it is important to configure
the circuit for fail-safe operation, which means that the "normally
open" contact should be used and configured so that a power failure
will raise an alarm in the connected device.
System Reference Manual
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