Measurement Computing DAC488 v.1 - Manual (Page 38)

32 DAC488 Operation DAC488 User’s Manual
Digital I/O Port
The digital I/O port on the DAC488 may be used to read eight TTL level inputs and control eight TTL level
outputs. The digital output port may also be configured for high voltage/high current operation. Once the
output port is configured for high level operation, the output can control relays and other high level devices.
One use of the high level outputs may be to energize a relay under program control. The following
Standard and CE diagrams each show how a digital output line can control a relay which in turn, connects
the DAC Port 4 output voltage to an external volt controlled device. The Digital Output (
D ) command
would then be used to control the relay. Sending the command D0X will energize the relay and a D8X will
deenergize the relay.