9
O P E R A T I N G I N S T R U C T I O N
Thermal Protection
The temperature control circuit that combines with the heating controls
working status of the fan.
The fan works in the lowest speed when the temperature reaches 45
When the temperature is gradually approaches 70
, the thermal protection
circuit will increase the fan speed until it reaches the maximum value.
The equipment enclosure ground terminal and ground power lines common
connection point.
Note:
there should be a section of the protective ground to have sufficient
strength and current-carrying capacity, thereby ensuring under fault conditions,
exposed conductive parts will not lead to shock, but not because of the current
flowing through the point of focus to produce high temperature heating
phenomenon .
Equipment grounding
Monitor terminal (status output)
R
1
5V DC RELAY
(Standby amplifier T-4D500)
The use of the terminal, according to the case-channel power ON / OFF state
and the protection of the state, through the DC relay to control the spare
amplifier (another T-4D500) working condition.
The circuit is designed to monitor the terminal voltage of between 5 and 6 feet
5V; please currents when used in a closed environment below 200mA.
