Brooks FireTracker FT2GAS, Руководство по эксплуатации и техническому обслуживанию, Страница: 21 / 58

FT2GAS
Gaseous Extinguishing System
Rev No. 1.3
21
2.5.2.8 External Buzzer
The FT2 control board has an internal PCB mounted buzzer which meets the buzzer sound level
requirement of 65dB at 1 metre distance with the door closed. If the internal buzzer sound level is
insufficient, an external buzzer can be installed to the CIE front plate. To disable the PCB mounted
buzzer, the resistor R8 located just next to the PCB buzzer on the FT2 control board needs to be
removed. Refer to the board layout under section 4.1.1 page 29.
Figure 8 External Buzzer Circuit
2.5.2.9 DIP Switch Configurations
Two DIP switches are provided in FTGAS for system configuration. One 4-way DIP switch, SW1 on the
FT2 control board (SUB922), Refer to section 4.1.1 page 29.
Another 8 way DIP switch, SW1 on the dual zone gas control board (SUB928), refer to section 4.1.2 on
page 31. The gas control board is mounted above the FT2 main control board and connected together
via a 9-pin D-range connector. To access DIP switch, SW1 on the FT2 main control board, disconnect
the power first then carefully remove the plug-in dual zone gas control board.
Table 10 FT2 Control Board (SUB922) DIP (4 way) Switch SW1 Configuration
Purpose
Switch Bank
Number
Status
On= 1 OFF= 0
Description
Zone latch 1
1 Zone alarm is non-latching
0 Zone alarm is latching (default setting)
Zone alarm
verification
2
1 Enable alarm verification (not used with FT2GAS).
0 Disable alarm verification. (default setting)
Zone relay controls 3 & 4 must set to 11
Zone Relay 1 activates only when one zone or
both zones is/are in alarm conditions,
Zone Relay 2 activates only when both zones are
in alarm conditions.
Note: The other settings of the two switches are
not used in FT2GAS but are used in FT2 system.