Siemens SITRANS F Series Operating Instructions Manual page 126

Appendix
A.3 I/O Connections and Wiring
①
②
③
Figure A-2
R = 250 Ω typical, 750 Ω maximum
V
c
I = 4-20mA
R
L
V = +30 VDC max.
c
R
L
124
Ω
4 - 20mA Output (current source)
Relay Output
Digital Input (NO TOT)
Typical TB1 Wiring
= 24 VDC typical / 30 VDC max.
= Loop wire resistance (both ways) plus User's input load resistance.
= 3K Ω minimum
Ω
Ω
④
Digital Input - (CLR TOT)
⑤
Pulse Output
Isolated 4-20mA Output TB1-1/2
PULSE OUTPUT TB1-14 / TB1-15
Operating Instructions, 02/2012, A5E03086487-05
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FST020 IP65 NEMA 4X