Q4 CONTROLLER II Operation and Maintenance Manual
Q4 Controller II Operation Manual
- 11 -
Dec 02, 2021
85350-101-000 Rev A
4.7 Sensor Port RS-485 and BAC-Box Installation
The TB8 can be programmable set to either work with BAC-Box which supports BACnet/IP
protocol, or work as Modbus RTU slave protocol, default is Modbus RTU protocol.
4.8 Buzzer, Strobe and Horn Outputs
The Q4 Controller supports strobe and horn outputs. Buzzer1 to buzzer 3 and strobe can be
programmed individually, horn output would be actuated if any of buzzers is/are actuated.
Buzzer 1: Continuous, normally used to be high alarm buzzer
Buzzer 2: Intermittent 50% duty cycle, normally used to be low alarm buzzer
Buzzer 3: Double-tap Intermittent, normally used to be fault alarm buzzer
The strobe and horn outputs are 24 VDC transistor outputs
The maximum current is not more than 250mA.