Product manual

Troubleshooting Tools
20 Product Manual
2.8 Digital and Combi I/O units
All the I/O units have the same LED indications. The figure below shows a digital
I/O unit, DSQC 328.
The description below is applicable for the following I/O units:
Digital I/O DSQC 328, Combi I/O DSQC 327,
Relay I/O DSQC 332 and 120 VAC I/O DSQC 320.
Designation Colour Description/Remedy
IN Yellow Lights at high signal on an input.
The higher the applied voltage, the
brighter the LED will shine. This
means that even if the input voltage
is just under the voltage level “1”,
the LED will glow dimly.
OUT Yellow Lights at high signal on an output.
The higher the applied voltage, the
brighter the LED will shine.
MS/NS Green/red See section 2.14.
OUT
IN
NS
MS
161514131211109
87654321
OUT
IN
X1
X3
X2
X4
10
1
10
1
10
1
10
1
Status LED’s
X5
1
12