Internet Communication Module 7845i-GSM Installation and Setup Guide
2-2
Wiring the 7845i-GSM
Wiring for ECP, 4204 and Two-4204 Modes
Most Honeywell ADEMCO control panels support LRR-ECP data communication, (e.g.,
VISTA-10P, VISTA-15P, VISTA-20P, LynxR-I, VISTA-128BP and VISTA-128FBP). However,
there are some panels that do not. Check the Installation and Setup Guide for the control
panel you are using to see if it supports ECP communication.
Connect the 7845i-GSM to a compatible Honeywell VISTA control panel's ECP terminals, in
parallel with keypads and other peripheral devices such as RF receiver, VIP module, etc.
Wire length/gauge limitations are the same for the module as they are for keypads and other
peripheral devices. To wire the module for ECP or 4204 modes, see
Figure 2
and make the
following connections:
Table 1. Wiring connections for ECP or 4204 modes
7845i-GSM Control
Terminal 3 V+
+12 V Aux
Terminal 4 GND
Ground
Terminal 5 Data In
Data Out
Terminal 6 Data Out
Data In
7845i-GSM
VISTA CONTROL PANEL
7845i-GSM-005-V0
GND
ECP DATA OUT
ECP DATA IN
ECP (+) VOLTAGE INPUT
GND
DATA IN
DATA OUT
+12 V AUX
2
6
1
4
5
3
TB1
BATTERY
ADEMCO
K14139
J1
TRANSFORMER
MODEL No. 1332
AC INPUT 2
AC INPUT 1
BLK
YEL
GRN
RED
Figure 2. Wiring a VISTA for ECP Mode or 4204 Modes
Unshielded, 22 AWG cable is recommended for 7845i-GSM power/data wires
