User manual

TREK-753 User Manual 46
5.6 GPIO Test
1. To execute the I/O Test, connect GPIO loopback, click Pin0, connect the end
which reads the signal, the bulb should light up, likewise to Pin1 ~ Pin3. Next
check the Digital Output box to execute the same procedure. See Figure 6.
Figure 5.12 DI/O Test
a. Digital Output ==> isolated relay driver output
b. Digital Input ==> isolated dry contact input
Figure 5.13 Digital In