Hardware Manual for the PCD3 Series│Document 26/789; Version E 5│31.01.2005
Saia-Burgess
Controls Ltd.
Power supply and connection plan
PCD3.Mxxx0 Classic CPUs and expansion housings
3-13
3
3.8
Power supply and connection plan
3.8.1 External power supply
Simple, small installations
+18V
0V
GND
L N
19VAC
±15%
Trafo min. 50VA
Sensors:
Electro-mechanical switches
Actuators:
Relays, lamps, small valves with < 0.5A switching current
Suitable for
PCD3.Mxxxx
modules:
PCD3.E1xx, E5xx, E6xx, A2xx, A4xx, B1xx, G4xx
PCD3.W1xx, W2xx, W3xx, W4xx, W5xx, W6xx
Small to medium installations
+18V
0V
GND
+24V =
0V
L N
L
N
19VAC
±15%
Trafo min. 50VA
24VDC
±20%
Controller
Sensors:
Electro-mechanical and proximity switches, photoelectric
barriers
Actuators:
Relays, lamps, displays, small valves with < 0.5A switching
current
Suitable for PCD3.Mxxxx
modules:
PCD3.E1xx, E5xx, E6xx, A2xx, A4xx, B1xx, G4xx
PCD3.W1xx, W2xx, W3xx, W4xx, W5xx, W6xx
PCD3. H1xx
*)
, H2xx
*)
, H3xx
*)
PCD7.D2xx
*)
*)
These modules must be connected to a smoothed 24 VDC supply