Arbor Technology FPC-7700 Series, User Manual

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Engine of the Computer
3.2.2. DIP Switch SW9
The computer comes with a DB44 female connector for COM ports 1~4.
COM1 and COM2 are fixed to RS232 while COM3 and COM4 can be switched
between loopback, RS232, RS485 half-duplex and RS485/RS422 full-duplex.
The main board is provided with a 8-toggle (16-pin) DIP switch on the top side
to switch COM3 and COM4 among the available protocols
Board Top
1
10
10
53
54
51 52
P10
P2
P9
P1
11 14
41 45
H1
H2
H4 H3
53
54
51 52
P10
P2
P9
P1
11 14
41 45
H1
H2
H4 H3
A44
A30
A15
A31
A16
A1
C6
C5
C4 C3
C2
I24
D24
D16
D8
D17
D9
D1
I17
I1
5
4
8
1
A10 A2
A9
A1
B5 B8
B4 B1
14 1
26 13
14 1
26 13
1 2 3 4
5
4
8
1
1
1
9 16
8 7 6 5 4 3 2 1
C1
I8
H4
H2
H1
H3
H4
H2
H1
H3
9 15 9 15
8 7
1
1 1
1 2
5 6
1
2
Among the toggles: Toggles 1, 2
and 3 control COM3. Toggles 4, 5
and 6 control COM4.
on
6 5 4 3 2 1
off
Toggle
7 8
COM3 COM4
.