SmartVue Operator’s Manual
10-0004-R13
33
Notes
•
Auto disable – To prevent a potentially unpredictable output to an externally
connected device, if the
Enabled spinner is set to Yes (auto disable), the output
will automatically be disabled if the process’ scale or the I/O configuration is
changed. If it is simply set to
Yes, the output will not be disabled if the process’
scale configuration is changed.
7.1
Using the Current Loop Outputs
The SmartVue’s two 4 - 20 mA current loop outputs are each designed to work in one of
two modes:
active, where the SmartVue provides the loop power or passive, where the
SmartVue must rely on loop power supplied by an external device. To use a current loop
output as an active source it must have external excitation from a supply voltage. The
Field Supply is conveniently located on the same connector to provide such a source.
For example, to use Current Loop Output 1 in active mode, you must hook up your
current loop device as shown in the Figure 7-1 below. The passive mode hookup is
shown in Figure 7-2.
