User manual

23 Chapter 2
Figure 2.7: Digital Input Connector Pin Assignments
2.10.2 Isolated Inputs
Each of isolated digital input channels accepts 0 ~ 50 VDC voltage inputs,
and
accepts bi-directional input. The voltage range is -3 ~ 3 VDC for logic
0 (low), -50 ~ -10 VDC and 10 ~ 50 VDC for logic 1 (high). It means that
you can apply positive or negative voltage to an isolated input pin (Vin).
All
channels share two common pins (I.GND). Figure 2.8 shows how to
connect an external
input source to an UNO-4672 isolated input channel.
Please note
that DI0 and DI2 may be configured as gate control pins of
Counter 0 and Counter 1;
While DI1 and DI3 may be configured as input
pins of Counter 0
and Counter 1.
Table 2.12: Digital Input Connector Signal Description
Signal Name Reference Direction Description
DI <0...7> I.GND Input Isolated DI signals
I.GND - - DI isolated ground