Input Signals - Siemens SITRANS FC620 Operating Instructions Manual

Transmitter
SITRANS FC
Fig. 97: Passive status output connection P/Sout or Sout for solenoid valve circuit
①
②
③
④
A relay must be connected in series to switch alternating voltage.
Passive pulse or
Output signals according to EN 60947-5-6 (previously NAMUR, worksheet NA001):
status output P/Sout
(NAMUR)
SITRANS FC
1
Fig. 98: Passive pulse or status output with switching amplifier connected in series
①
②

13.4.1.4 Input signals

Active current input
An individual analog power input is available for external analog devices.
lin
The active current input lin is provided for connecting a two-wire transmitter with an
output signal of 4 – 20 mA.
Nominal input current range
Maximum input current range
Internal power supply
Internal load resistance SITRANS FC
SITRANS FC
24 V
0 V
Fig. 99: Connection of external device with passive current output
①
Passive current
The passive current input lin is provided for connecting a four-wire transmitter with an
input lin
output signal of 4 – 20 mA.
P/Sout+ or Sout+
P/Sout- or Sout-
Relay
Solenoid valve
Magnetic valve power supply
Protective diode
1kΩ
P/Sout+
10kΩ
P/Sout-
Passive pulse or status output
Switching amplifier
Iin+
Iin-
External passive current output device
1
4
3
2
Value
4 – 20 mA
2.4 – 21.6 mA
24 V ±20 %
DC
≤ 160 Ω
1
A5E52748375-AA, 2023/09
FC6x0
Wiring
2
133 / 194