Data Sheet for Product

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Siemens Electronic connection for valves with magnetic actuator CA1N4591en
Building Technologies 2019-02-28
If, for reasons of cross-section, the AC 24 V and DC 0 ...10 V (or DC 4 ... 20 mA)
cables are routed separately, the AC 24 V cable need not be twisted.
ZM../A supplied from controller transformer or (over longer distances) from a sepa-
rate transformer.
50210 A
1
2
3
4
~
~
–
+
ZM120/A
ZM121/A
ZM220/A
DC 4 ... 20 mA
5
6
AC 24 V
~
~
–
+
Controller
Several DC 4 ... 20 mA receivers can be driven by the same control signal (series
connection – check input impedance!).
DC 0...20 V Phs
phase cut
1
2
3
4
ZM110, ZM111
5
6
DC 0...20 V Phs
phase cut
50214
1
2
3
4
ZM210
5
6
DC 0...20 V Phs
phase cut
50215
1
2
3
4
–
+
5
6
(–)
(+)
Caution!
Do not connect AC 24 V operating
voltage!
Pay attention to polarity of phase cut
signal DC 0…20 V Phs!
Twisted pairs
The transformer is sized by applying the following formula:
Transformer power P
Tra
= 1.4 • Sum of the individual loads
Note:
ZM../A, DC 4…20 mA
Note:
DC 0...20 V Phs
ZM110, ZM111, ZM210
DC 0…20 V Phs
ZM100/A, ZM101/A,
ZM200/A, ZM120/A,
ZM121/A, ZM220/A
Transformer sizing