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39
Zone Expander Cards
Two types of zone expander cards are available, the Gardtec
816
Expander Card that
may only be used on the
816
and the Gardtec
840
Expander that may be used on the
816/840.
Up to eight zone expander cards may be fitted to the Gardtec
840
and two on the
816
control panel. If required one of these expander cards may be plugged directly onto the
the main PCB, the other expander cards then being wired to the plug-on card as
shown in Fig. 30. Four cores are required for interconnection of the zone
expanders. If Output Expanders are to be used (
840 only
) on the same leg as
zone expanders an extra core will be required.
Fig. 30a Gardtec
840
Expander Card Wiring 'Daisy Chain' Format
840
840
Expander1 (Plugged on)
Expander2
Expander3
To Others
12V
12V
12V
0V
0V
0V
SAD 1
SAD 1
SAD 1
SCLK
SCLK
SCLK
Fig. 30b Gardtec
816
Expander Card Wiring ‘Daisy Chain’ Format
Expander1 (Plugged on)
Expander2
12V
12V
0V
0V
SADIN
SADIN
SCLK
SCLK
The expander cards may also be wired back to the onboard expander card in 'Star'
format (each expander card wired back individually).
Alternatively all the zone expander cards may be wired to the main PCB via an
optional zone expander cable Part No. 01-094. If the
816
Expander Cards are being
used two expander cables will be required. When using the zone expander cable the
following colours should be used (see Figs 31a, 31b).
If Output expanders are used (
840
only) all SAD 2 connections should be
interconnected. If the expanders are remote from the main PCB a second expander
cable will be required to plug onto PCB EXP2 socket. The SAD2 connection on this
second cable is the yellow core.
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38
+
-
Alarm
Alarm
TMP
TMP
4K7 Resistor
6K8 Resistor
+
-
Alarm
Zone
Aux
Single Detector
Gardscan, Shockgard etc.
+
-
Alarm
Alarm
TMP
TMP
4K7 Resistor
6K8 Resistor
+
-
Alarm
Alarm
TMP
TMP
+
-
Alarm
Zone
Aux
Wire Link
6K8 Resistor
Double Detector
Gardscan, Shockgard etc.
Alarm
Alarm
TMP
4K7 Resistor
6K8 Resistor
Alarm
Zone
Single Contact
Any Brass Screw
For Tamper
Use Two Silver
Screws For Alarm
Alarm
Alarm
TMP
4K7 Resistor
6K8 Resistor
Alarm
Zone
Double Contact
Any Brass Screw
For Tamper
Use Two Silver
Screws For Alarm
Alarm
Alarm
6K8 Resistor
Use Two Silver
Screws For Alarm
Fig. 26
Fig. 27
Fig. 28
Fig. 29
GARDTEC
800 Series
GARDTEC
800 Series
Wiring Connections
Wiring Connections
4344R12.qxd 03/09/99 11:09 Page 38