Saia-Burgess Controls AG
Manual
Manual PCD 1 / PCD 2 Series
│ Document 26
/
737 E
N22 │ 2013-11-26
CPUs and expansion housings
3-27
Power supply and connection plan
3
3.9
Power supply and connection plan
3.9.1 External power supply
Simple, small installations
+18V
0V
GND
L N
19VAC
±15%
Transformer min. 50VA
●
Sensors:
Electro-mechanical switches
●
Actuators:
Relays, lamps, small valves with < 0.5 A switching current
The transformer voltage of 19 V
AC
±15% must be maintained. If not, the supply voltage at
the input to the Saia PCD
®
may become too high and destroy it.
The PCD2. H1xx, H2xx, H3xx, PCD7.D1xx, D2xx and PCA2.D12/D14 modules must be
connected to a smoothed 24 V
DC
supply
Small to medium installations
+24V =
0V
GND
L
N
±20%
L N
CONTROLLER
24 V
DC
Controller: usual primary switched network component
●
Sensors:
Electro-mechanical and proximity switches, photoelectric
barriers
●
Actuators:
Relays, lamps, displays, small valves with < 0.5 A switching
current