Emerson Rosemount 702 Quick Start Manual page 21

April 2018
(SV). The PV is determined by the CH1 input. The SV is determined by the
CH2 input. A closed switch drives a TRUE output. An Open switch drives a
FALSE output.
Note
Any dry contact input may optionally be inverted by the device, so change
the discrete logic state. This is useful, for instance, if a normally open switch
is used to replace a normally closed switch.
Figure 5-2:
A. Single Input
B. Dual Input
Table 5-1:
Switch input
CH1
Closed
Open
5.2.2 Dual input, limit contact logic
When configured for Limit Contact Logic, the Rosemount 702 Transmitter
will accept the input from two single pole single throw switch on inputs CH1
and CH2, and will use limit contact logic for the determination of the wireless
outputs.
Quick Start Guide
Single and Dual Input
Single or Dual Input
Wireless output
PV
TRUE (1.0)
FALSE (0.0)
Switch input Wireless output
CH2 SV
Closed TRUE (1.0)
Open FALSE (0.0)
Quick Start Guide
21