SBC PCD2.M5 Series - Page 142

Hardware Manual for the PCD2.M5 Series│Document 26/856; Version EN 12│2014-07-24
Saia-Burgess Controls AG
Digital output modules
Input/output (I/O) modules
6-31
6
LEDs and connection terminals
Bus connector
Bus interface
Relays
Contact protection
LEDs
Screw terminals
Relay contacts
Supply 24 VDC for
Relay coils
9 8 7 6 5 4 3 2 1 0
A0A1A2A3
A0A1A2A3
Output circuits and terminal designation
A0
0
1
8
9
A3
6
7
I/O Bus
PCD Bus
Contact
protection
Relay
contacts
Terminals
24 VDC Isolated contacts
Adress
LED A3
Relayenergized(contactclosed): LEDon
Relayreset(contactopen):  LEDoff
24 VDC must be connected to the +/- terminals.
With an open relay contact, the current leakage through the contact protection is
0.7 mA(at230V/50Hz).ThisshouldbetakenintoaccountforsmallerACloads.
Ifthisistoohigh,itisrecommendedtouseaPCD2.A220module(withoutcontact
protection).
Watchdog:Thismodulecanbeusedonallbaseaddresses;thereisnointeractionwiththe
watchdogontheCPUs.Fordetails,pleaserefertothe"Watchdog" section, which describes
the correct use of the watchdog in conjunction with PCD2 components.
LED Output
0 O0
1 O1
2 O2
3 O3