Data Sheet for Product
14/18
Siemens PXC….D – Automation stations, compact model CM1N9215en_25
Smart Infrastructure 2022-01-15
Connecting the field devices
In the automation stations described in this data sheet, system neutral (G0) and
measuring ground (–) are NOT CONNECTED.
For active 4-wire field devices, this connection is made in the device.
For active 3-wire field devices, you have to make an additional connection:
either on the terminals of the field device
or between one of the (–) terminals of the automation station and G0
(in existing plants where there are only 3 conductors installed).
Field device supply voltage from system transformer
Counter inputs Counter inputs faster than 1 Hz must be shielded if they are routed in the same trunking
as analog inputs for more than 10 m.
Passive sensors
(e.g. QAM... , Ni 1000)
Active sensors
(e.g. QFM... , humidity)
9215A03_01
QAM...
(Ni1000)
QFM...
(r.h.)
AC 24 VG
G0
G0G0G0GGG
M
G
B
M
B
M
N
24V
U U
CP+
CP-
U U
Magnetic valves
(e.g. M3P... + ZM
or MX...461...)
9215A04_01
M3P... + ZM
AC 24 VG
G0
G0G0G0GGG
2
1
4
3
N
24V
CP+
CP-
MX...461...
1
2
3
G0 (GN)
G (GL)
YM
Y
4
U UU U
Motorized valves
9215A05_01
AC 24 VG
G0
G0G0G0GGG
G0
G
Y
N
24V
CP+
CP-
1
2
U UU U
STOP
Note!