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2 INSTALLATION

The B1225E should be mounted in a clean, dry area suitable for electronic equipment. All

connections, except for the signaling cables, are made to the compression screw terminals

TB1 and TB2. TB1 handles all of the inputs and power, while TB2 contains the relay con

tacts.

An 11 to 16 volt, negative ground power supply capable of delivering 200 mA is required. If

the AC supply/battery back-up option is used, connect the red wire to TB1-1 and the black

wire to TB1-9. The ground terminal is also used in a common reference for the alarm inputs.

The signaling cables between the master and the expanders connect from SERIAL OUT on

one board to SERIAL IN on the next. This provides communication between the master and

the expanders.

Refer to diagram Figure 1 for wiring instructions.

POWER TB1-9 Neg. TB1-10 position

The B1225E requires 11 to 16 VDC, negative ground to operate. Typical operating current

is 100 mA, but may increase if all relays or LEDs are on. Connect power to the board only

after all other connections have been made.

B1225E BARNETT ENGINEERING LTD. PAGE 3

Figure 1 Installation Wiring

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Code Alarm CR3 Manuale Utente Pagina 4