5. Digital Input and Output Interfaces
5.1 Digital Inputs
QC400 contains an extended wiring IO board, which is powered by an independent
external 24V power supply. It has 34 ordinary inputs and 27 ordinary outputs (6 relays are
included). Effective input level can be determined to high or low according to the level
configuration of common terminal.
5.1.1
Input Interface Definition and Pin Functions
INPUTCOM(input common terminal): an external 24V or 12V power supplied.
Digital input interface uses a 37-pin DB terminal and 20-pin socket, which contains the
power and common wiring ports.
Pins’ arrangement of digital input port is shown as following:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
18
16
17
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
IN_0
IN_1
IN_2
IN_3
GND_24V
INPUTCOM
IN_4
IN_5
IN_6
IN_7
P 24V
IN_8
IN_9
IN_10
IN_11
IN_12
GND_24V
INPUTCOM
IN_13
IN_14
DI_15
IN_16
IN_17
P 24V
IN_18
IN_19
IN_20
IN_21
GND_24V
INPUTCOM
IN_22
IN_23
IN_24
IN_25
P 24V
IN_26
IN_27
Figure 5-1 Digital input ports
Note:
Input board contains three INPUTCOM ports. All input ports can be used if only one of
INPUTCOMs is supplied with 24V.