Appendix B Specifications And Reference Data; Functional Specifications; Discrete Input; Wireless Output - Emerson Rosemount 702 Reference Manual

9 Appendix B specifications and
reference data
9.1

Functional specifications

9.1.1

Discrete input

Single or dual SPST dry contacts, single SPDT dry contacts or leak detection. To maintain
I.S. ratings, contacts must be limited to simple switches or leak detection only.
A.1.3 Switching threshold, models 702DX32, 702DX42
•
•
A.1.4 Momentary discrete input, models 702DX32, 702DX42
Detects momentary discrete inputs of 10 millisecond or more duration. At each wireless
update, device reports current discrete state and accumulating count of close-open cycles.
Accumulating count registers from 0 to 999,999, then re-sets to 0.
A.1.5 Discrete output, model 702DX42
Maximum rating: 26 Vdc, 100 mA
On resistance: typical 1 Ohm
9.1.2

Wireless output

IEC 62591 (WirelessHART
A.1.7 Radio frequency power output from antenna
External (WK option) antenna: maximum of 10 mW (10 dBm) EIRP
Extended range, external (WM option) antenna: maximum of 18 mW (12.5 dBm) EIRP
High gain, remote (WN option) antenna: maximum of 40 mW (16 dBm) EIRP
A.1.8 Local display
The optional integral LCD can display discrete state and diagnostic information. Display
updates at each wireless update.
(1) Reference conditions are 70 °F (21 °C), and routing data for three additional network devices.
Reference Manual
Open greater than 100 K Ohm
Closed less than 5 K Ohm
®
) 2.4 GHz DSSS
(1)

Appendix B specifications and reference data

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