Inputs; Supply; Data Buses; Rs485 Wiring Configurations - Honeywell Galaxy 2 Series Installation Manual

Galaxy 2 Series Installation Manual

Inputs

Line Fault: This input tells the panel that the communicator has a telephone line fault (active low).
Reset: This input from the communicator resets the panel on a low to high signal (negative removed).

Supply

A 100 mA, 12V output is also provided. The output is fused by the on-board AUX FUSE (F2).

Data Buses

Two separate data buses are available to connect the Galaxy 2–44+ panel to its peripherals.
Communication between the Galaxy 2–44+ control panel and the peripherals attached to it (see Figure 1),
takes place on the data bus. The control panel constantly monitors the peripherals attached to it. A break in
the communication from any of the peripherals generates a tamper alarm.

RS485 Wiring Configurations

The system must be wired in a daisy-chain configuration. That is the A line from the previous peripheral is
connected to the A terminal of the current peripheral and then on to the A line of the next peripheral.
The RS485 (AB) line must have a 680 Ω resistor fitted across the A and B terminals of the last peripheral on
the line.
Galaxy 2-44
Control Panel
680 Ω
+12V
Trig 8
Trig 7
Trig 6
Trig 5
Trig 4
Trig 3
Trig 2
Trig 1
Line Fault
Reset
GND
Figure 11. Trigger Header
A
B
Factory fitted on PCB
Figure 12. Daisy-chain Configuration
17
Trigger Header
GALAXY 44 V1.0
09:51 01/08/04
Keypad
A
1 2
3
OR
B
4 5 6
Peripheral
7 8 9 ent
* 0 # esc
B
A
GALAXY 44 V1.0
09:51 01/08/04
A
1 2
3
B
4 5 6
7 8 9 ent
* 0 # esc
A
B
680 Ω EOL