Digital Inputs; Hart - Siemens SITRANS FC720 Operating Instructions Manual

Electrical interfaces
A relay must be connected in series to switch alternating voltage.
Output signals according to EN 60947-5-6 (previously NAMUR, worksheet NA001):
Passive pulse or
status output P/Sout
SITRANS FC
(NAMUR)
1
Fig. 43: Passive pulse or status output with switching amplifier connected in series
①
②

11.1.2.2 Digital inputs

Status input Sin
Do not connect a signal source with electric voltage.
The status input is provided for use of voltage-free contacts with the following
specification:
Switching status
Closed
Open
SITRANS FC
Fig. 44: Status input connection

11.1.3 HART

For HART communication devices, it is supplied on the current output lout1. The current
output may be operated in compliance with the NAMUR NE43 standard. HART is
available with non-intrinsically and intrinsically safety outputs.
HART I/O
Order code
position -Z
E06+F11
E06+F22
E06+F23
1kΩ
P/Sout+
10kΩ
P/Sout-
Passive pulse or status output
Switching amplifier
Connection terminal assignment
I/O1 +/- I/O2 +/-
Iout1 P/Sout1
Active Passive
Iout1 P/Sout1
Active Passive
Iout1 P/Sout1
Active Passive
2
Resistance
< 200 Ω
> 100 kΩ
Sin+
Sin-
I/O3 +/- I/O4 +/-
– –
P/Sout2 Iout2
Passive Active
Iout2
Sin
Active
A5E52748387-AA, 2023/09
FC7x0
Transmitter
WP
Write-protect
Write-protect
Write-protect
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