March Products 120 III (PC620) - Manual (Page 124)

User Manual version 2503
LIBRA 120 III (PC620 Intel 815E) 6-114
B: DIO (Digital Input & Output)
The LIBRA III provides 2-channel digital input and output
that can be used for the system’s simple automation control
needs. The digital I/O can be configured to control the
opening of a cash drawer or to sense the warning signal of an
uninterrupted power system (UPS) or to do the store security
control.
The DIO port address and pin definition is listed below;
I/O Port address: 200H/208H By CMOS Setting
Read: SD0, SD1
Write: SD4, SD5
1 2 3 4 5 6
DIO1
RJ11
VCC12
VCC5
VCC5
IN_0
IN_1
OUT_1
OUT_0
MOSFET N
4.7K
DIO1
RJ11
1
2
3
4
5
6
4.7K
SD0 IN_0
SD1 IN_1
-IOR206H
74LS244
2 18
4 16
6 14
8 12
11 9
13 7
15 5
17 3
1
19
20
10
1A1 1Y 1
1A2 1Y 2
1A3 1Y 3
1A4 1Y 4
2A1 2Y 1
2A2 2Y 2
2A3 2Y 3
2A4 2Y 4
1G
2G
VDD
GND
IO 206H(READ) IO 208H(READ)
SD 4 OUT_0
SD 5 OUT_1
-IOW206H
74LS273
3
4
7
8
13
14
17
18
11
1
2
5
6
9
12
15
16
19
20
10
D1
D2
D3
D4
D5
D6
D7
D8
CLK
CLR
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
VCC
GND
IO 206H(WRITE) IO 208H(WRITE)
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