Wiring Connections
Page
23
Page
22
Wiring Connections
BATT + & -
Factory fitted Sealed Lead Acid battery connections. The Gardtec
840
is suitable for
the installation of all the popular sizes of alarm batteries. Suggested sizes would be:-
12V 1.2Ah
Suitable only for the smallest installations.
12V 2.0Ah
Suitable only for small installations.
12V 3.0Ah
Suitable for small to medium size installations.
12V 7.0Ah
Suitable for all installations.
Reference should be made to current policies to determine the actual battery capacity
requirements for your system. As a general rule:-
Calculate the total quiescent current draw of the system including
control panel, RKPs, communicator, detectors and any other
auxiliary equipment then use this in the equation shown:-
Quiescent Current x 8 hours = Minimum Battery Size
The actual size of the battery should be made up to the nearest size available.
K/S
Keyswitch input. If required the Gardtec
816/840
may be operated by a keyswitch.
Operation is by applying 12V to this terminal (see Fig. 14). The mode of operation is
dependent on how the keyswitch option is programmed (refer to Programmable
Options Description and also see Remote Reset).
Note:- The Gardtec
840
may be programmed to use zones for keyswitch setting.
Fig. 14 Keyswitch Connection
Keyswitch
12v K/S
Note:
Keyswitch type may be
Normal (Open/Close)
or Biased (Momentary)
or Locked (keypads
lock when used)
See also Remote Reset
Output Connections
The output connections for the Gardtec
800 Series
are situated along the bottom edge
of the main PCB in the master control panel.
Warning:-
It should be noted that the total output current available for the Gardtec
800
Series
is 1 Amp. Any attempt to draw a total current greater than this could
result in serious damage to the control panel that is not covered by the
manufacturers warranty.
Below is a description of each terminal. The order given is the same as the terminal
order on the PCB looking from left to right.
Output Terminal Descriptions
RELAY COMM
A 24V 1Amp *
1
changeover relay is provided on the Gardtec
816/840
PCB. This relay
is fully programmable (refer to Programmable Options Description). The relay contacts
are voltage free. This terminal is the common connection (see Fig. 13).
N/O
Normally Open connection for onboard relay (see Fig. 13).
N/C
Normally Closed connection for onboard relay (see Fig. 13).
Fig. 13 Onboard Relay Operation
*
1
No attempt should be made to exceed the stated current and the 1 Amp
maximum current draw from the control panel must be taken into consideration.
Relay
Comm
N/O N/C
Relay
Comm
N/O N/C
Relay De-Energised
(Normal)
Relay Energised
(Activated)
GARDTEC
800 Series
GARDTEC
800 Series
4344R12.qxd 03/09/99 11:09 Page 22
