Hardware Manual

Hardware Manual PCD 1 / PCD 2 Series│Document 26 / 737│Edition EN 15│2008-07-22

Saia-Burgess Controls AG

Power supply and connection plan

CPUs and expansion housings

3

3.9 Power supply and connection plan

3.9.1 External power supply

Simple, small installations

+18V

0V

LN GND

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 VAC ±15% must be maintained. If not, the supply voltage at

the input to the 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 VDC supply

Small to medium installations

+24V =

0V

GND

L

N ±20%

LN

CONTROLLER 24 VDC

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