Di/do connection specifications – ACTi V21 User Manual
Page 20
Encoder Hardware Manual
DI/DO Connection Specifications
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, < 50mA
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 (< 50mA), then the encoder can supply internal power to these devices and
there is no need to connect the DI/DO device to an external power source.
Use the
GND
and
DI
pins to connect a DI device and use the
DIO
and
12V
pins to connect a DO
device. See wiring scheme below: