Emerson Rosemount 702 - Discrete Input from Switches and Sensors; Dry Contact Inputs, Measurement Option Code 22 (702 DX22); Wireless Output Specifications

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Reference Manual
00809-0200-4702, Rev CA
Section 5: Operation and Maintenance: Models 702DX22 and 702DX61
February 2013
Operation and Maintenance: Models 702DX22 and 702DX61
5.2 Discrete Input from Switches and Sensors
5.2.1 Dry Contact Inputs, Measurement Option Code 22
(702DX22)
Figure 5-1. Rosemount 702 Terminal Diagram
.
5.2.2 Wireless output specifications
Dual input
The Rosemount 702 transmitter will accept the input from one or two single pole single throw
switches on inputs S1 and S2. The wireless output of the transmitter will be both a primary
variable (PV) and a secondary variable (SV). The PV is determined by the S1 input. The SV is
determined by the S2 input. A closed switch drives a TRUE output. An Open switch drives a
FALSE output.
Note
Any dry contact input can be inverted by the device, so as to give the opposite effect. This is
useful, for instance, if a normally open switch is used to replace a normally closed switch.
Figure 5-2. Single, Dual Input
1
2
4
3
Single Input Dual Input
S1
CMN
S2
CMN
S1
CMN
S2
CMN