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ZABER TECHNOLOGIES INC.
10.2. Digital Outputs
All digital outputs on the X-MCB1 are fully optoisolated and capable of sinking 15mA each at up to
50V. The first example circuit below shows how to drive an LED from one of the digital outputs. In
order to switch loads with a higher current draw, for example a relay, an external switching
transistor is required, as shown in example 2.
The digital outputs are set through the io set command, as shown below.
/1 io set do 1 1
@01 0 OK IDLE – 0 /1 io set do 1 0
@01 0 OK IDLE – 0
The first command sets the first digital output, which would cause the LED in example 1 above to
glow. The second command clears the output, turning off the LED.
TTL Outputs
Additional circuitry is required to get TTL signal levels from the X-MCB1, as shown below.