NEXCOM NViS 3620 - Manual (Page 82)

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Appendix D: Signal Connection of MCU DI/DO
NViS3620/3720 series User Manual
Activating Pre-Alarm function
Step 1: Setup Pre-Alarm function
Step 2: Connect Event Button to sensor (such as reed switch)
Normally, the status of Event Button is “Short”. Once the status becomes
“Open”, Event Button will be triggered.
Step 3: Connect MCU-DI2 to sensor
Normally, the status of MCU-DI2 is “Low”. Once the status becomes
“High”, MCU-DI2 will be triggered.
Low level: < 3.3V
High level: > 3.3V
Step 4: Connect MCU-DO1 and MCU-DO2 to external relays
Relays can be used to drive external devices (such as siren or warning light).
Each MCU-DO port can wire a relay.
(Normal)
MCU-DO1 & MCU-DO2: OPEN
(Triggered)
MCU-DO1 & MCU-DO2: GND
Step 5: Flag A and Flag C will become “1” automatically
Flag A: at I/O Address -- 0x0ED8 bit4
Flag C: at I/O Address -- 0x0ED8 bit5
Deactivating Pre-Alarm function
(For Event Button)
Option 1:
If Central Locking System is initiated by negative signal:
When MCU-DI1 is “High”, Pre-Alarm Function is deactivated.
If Central Locking System is initiated by positive signal:
When MCU-DI1 is “Low”, Pre-Alarm Function is deactivated.
Option 2:
Whiting”1” to the Flag B, Pre-Alarm Function will be deactivated.
Flag B: at I/O Address -- 0x0ED8 bit2
Option 3:
When Ignition signal is “High”, Pre-Alarm Function is deactivated.
(For MCU-DI2)
Option 1:
If Central Locking System is initiated by negative signal:
When MCU-DI1 is “High”, Pre-Alarm Function is deactivated.
If Central Locking System is initiated by positive signal:
When MCU-DI1 is “Low”, Pre-Alarm Function is deactivated.
Option 2:
Whiting”1” to the Flag B, Pre-Alarm Function will be deactivated.
Flag B: at I/O Address -- 0x0ED8 bit2
Option 3:
When Ignition signal is “High”, Pre-Alarm Function is deactivated.