Section 2: Mounting and Wiring
2-7
Power Connections and Options
Primary power for the 7845i-GSM is provided by the AC plug-in transformer. For ECP
communication, you must also connect the +12VDC AUX voltage output of the control panel
(9.6V-13.8V typical) (see
Figure 9
). In the case of the LynxR-I, primary power is supplied by
the LynxR-I unit through the LRR/IP communication port.
In all installations, TB1-4 GND must be connected to ground (GND) on the control panel.
7845i-GSM
CONTROL PANEL
7845i-GSM-009-V0
GND
12V AUX
GND
ECP (+) VOLTAGE
2
1
4
5
3
TB1
TRANSFORMER
MODEL No. 1332
AC INPUT 2
AC INPUT 1
J1
BATTERY
ADEMCO
K14139
RAD FLT
11
Z1/ Z2 or DATA IN
Figure 9. Powering the
7845i-GSM
NOTE:
When calculating the total load on the auxiliary power output of the control panel,
budget 10mA for the 7845i-GSM when using ECP mode.