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WIRING THE 7920SE
Remove the Interface Board chassis cover to access the terminal blocks
for
wiring connections. Connect the 7920SE to the alarm control panel, routing
the wires through the chassis knockout hole, as follows. Use either shielded
or twisted pair 22 AWG wire.
Transformer wires to the radio must not exceed the lengths given in the
following table.
Trans.
16.5V, 40 VA
18V, 40VA
Radios SN Lees than
Wke
Max."Number of
Max Number of
3700 18v, 40VA Max
Sz!2
rom RadlQ
FT. from Radio
Number of feed from
m
25
27
8.5
;;
40
44
14
20
22
18
1%)
1?9
35
16
150
164
50
NOTE: When installing the Ademco 712BNP or ADI YA-NP 712, 12V, 7AH
Battery, check that the qulckdlsconnect
connectors coming from
the radio make good contact with the battery terminals.
If they
feel loose to the touch, remove them from the battery and
squeeze them using a Iong nose pliers.
Zone Input Terminals
For traditional channel trigger operation, TB2 terminals 1-6 represent channels
1-6 respectively, and can be connected to the appropriate control panel zone
trigger outputs. Any channel can be used as the Telco fault input. Each
channel is normally at a low voltage, with faults triggered by voltage inputs
(4.5- 12VDC).
These terminals can also be individually programmed for
inverted operation (i.e. normally high input, with triggering on loss of voltage
or on dry contact openings).
Refer to the SUMMARY OF CONNECTIONS
Diagram at the back of this
manual for wiring connections.
Remote LED/Control Output Connections (optional).
These outputs are
TTL
Level outputs. These outputs cannot drive relays
directly. LEDs maybe connected to these outputs directly. The LED Anode
should connect to the output with a 3900hm resistor in series.
The LED
cathode should connect to circuit ground TB1 -3.
- 22-
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