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Output Expander Modules (OPX)
Up to four output expander modules may be fitted to the Gardtec 872 control panel.
These modules may, if required be wired in a chain of zone expanders or on a
separate leg(s). The zone expanders only require four cores for interconnection,
if Output Expanders are used on the same leg five cores will be required.
Two types of module are available:-
Four open collector outputs. Max current sink 350mA each.
Four change over relays. Contact rating 1A 12V (resistive).
Each Output Expander (OPX) has a bank of four jumper switches labelled OPX1 to
OPX4. The output allocation is as follows:-
Jumper Position Output No (LCD) Output No (LED)
OPX1 OP1 1
OPX1 OP2 2
OPX1 OP3 3
OPX1 OP4 4
OPX2 OP1 5
OPX2 OP2 6
OPX2 OP3 7
OPX2 OP4 8
OPX3 OP1 9
OPX3 OP2 10
OPX3 OP3 11
OPX3 OP4 12
OPX4 OP1 13
OPX4 OP2 14
OPX4 OP3 15
OPX4 OP4 16
Notes: If required, two expander cards may be configured on the same ident to
enable duplication of outputs.
When using any devices that consume current, consideration MUST be
given to the overall current available from the control panel.
The invert link on the card will invert all the outputs of the card.
PR5892 Rev11 800 Series Eng Ref 15.qxd 16/11/2006 11:20 Page 49
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