Analog Inputs - Siemens SITRANS FC720 Operating Instructions Manual

FC7x0
Transmitter

11.1.1.2 Analog inputs

An individual analog power input is available for external analog devices.
Active current input
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. 32: Connection of external device with passive current output
①
The passive current input lin is provided for connecting a four-wire transmitter with an
Passive current
output signal of 4 – 20 mA.
input lin
Nominal input current range
Maximum input current range
Internal load resistance SITRANS FC
SITRANS FC
Fig. 33: Connection of external device with active current output
①
76 / 180
Iin+
Iin-
External passive current output device
Iin+
Iin-
External active current output device
A5E52748387-AA, 2023/09
Value
4 – 20 mA
2.4 – 21.6 mA
24 V ±20 %
DC
≤ 160 Ω
1
Value
4 – 20 mA
2.4 – 21.6 mA
≤ 160 Ω
1
Electrical interfaces