ACTi B54 - Page 13

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Hardware Manual
13
The table below shows the DI/DO connection specifications:
Device
DI
Connection design
TTL - compatible logic levels
Voltage
To trigger (low)
Logic level 0: 0V ~ 0.4V
Normal (high)
Logic level 1: 3.1V ~ 30V
Current
10mA ~ 100mA
DO
Connection design
Transistor (Open Collector)
Voltage & Current
< 24V DC, < 100mA
Typical Connection
Based on these specifications, if the DI device has a voltage of 0V ~ 30V or the DO device has
a voltage of < 24V (<100mA), then the camera can supply internal power to these devices and
there is no need to connect the DI/DO device to an external power source.
In this case, wire connection to Pins 1 to 4. Use the DIO GND and DI pins to connect a DI device
and use the DIO PW and DO pins to connect a DO device. See wiring scheme below:
High Voltage DO Device Connection
Even though the camera provides 12V power, this may not be enough for some high voltage
DO devices, such as a ceiling light or a motor that opens or closes a gate. In this case, there is
a need to connect an external relay. See wiring scheme below: