3
Chapter II Installation, dimensions and appearance
2.1 Appearance and dimensions of GB350E
Weight: 13kg
Fig. 2.1 Dimensions of chassis
2.2 Description of wiring terminals
Terminal label
Usage
Mains 220V
Used for external connection with 220V mains supply
when working properly
Backup power
220V
Externally connected to 220V fire control power
supply, used for power supply in case of mains
failure.
Constant voltage
output (+, -)
Used for outputting the sound source and driving the
external speaker to produce sound.
485 (A, B)
Used to connect to communication port of external
control panel .
Remote control
input
(+, -)
Used to connect external excitation signal and trigger
emergency broadcast remotely.
External line 1
Used to input external sound source to the
equipment for playing. (Volume adjustable).
External line 2
Used to input external sound source to the
equipment for playing.
Telephone trunk
(L1, L2)
Reserved
Telephone
terminal (A, B)
Reserved
24V input (+, -)
Reserved