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Appendix D: Signal Connection of MCU DI/DO
VTC 7200-BK Series User Manual
Pre-Alarm Function by Event Button,
MCU-DI and MCU-DO
Pre-Alarm function allows VTC 7200 to monitor the environment and make
reaction, even when VTC 7200 is turned off.
By monitoring the environment with sensors connected to Event Button
and MCU-DI ports, VTC 7200 can react to certain situations. For example,
events triggered by external sensors, such as temperature change, instrusion
or vibration, VTC 7200 can react accordingly by turning on the siren or
warning light, and power on automatically for further action against the
event.
Setting up Pre-Alarm function
MCU-DI1 is used to initiate Pre-Alarm function, which is usually connected
to the vehicle’s Central Locking System. As such, the Pre-Alarm function on
VTC 7200 will be initiated or released based on the locking and unlocking
state of the Central Locking System. For instance, when the Central Locking
System is initiated or released, the Pre-Alarm function on VTC 7200 will be
initiated or released, respectively.
Step 1: Enable/Disable Pre-Alarm function in BIOS
Select “Enable” or “Disable”to initiate or terminate Pre-Alarm function.
Step 2: Select the trigger threshold level in BIOS
For vehicles with electric central door lock, check the corresponding trigger
type (negative or positive), then connect MCU-DI1 to Central Locking
System in vehicle.
Negative level: < 3.3V
Positive level: > 3.3V
If the Central Locking System is initiated (locking signal is received) by a
negative signal, select “Low” in the trigger threshold level. Once the Central
Locking System is released by a positive signal, the Pre-Alarm function on
VTC 7200 will be released.
If Central Locking System is initiated (locking signal is received) by a positive
signal, select “High” in the trigger threshold level. Once Central Locking
System is released by a negative signal, the Pre-Alarm function on VTC 7200
will be released.
MCU-DI1 & MCU-DI2 (source type): 3~12VDC
MCU-DO1 & MCU-DO2 (source type): 3~18VDC