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2
Hardware Installation
JP13 is used to set COM 4 to RS-232 or RS-485. If the serial
device connected to this port requires 5V/12V power from the
system board, set JP13 pins 9-11 and 10-12 to On. This setting
automatically sets COM 4 at RS-232.
The table below list the pin assignment of JP13.
COM 4 RS232/RS485/AUX Select
X
JP13
1
2
11
12
1
2
11
12
1
2
11
12
1-3, 2-4, 7-9, 8-10 On:
RS232
(default)
3-5, 4-6, 7-9, 8-10 On:
RS485
9-11 (12V),
10-12 (5V) On:
Auxiliary power
1
2
11
12
1
3
5
7
9
11
N. C.
EN232-
GND
MDCD4-
X_MDCD4-
+12V
2
4
6
8
10
12
N. C.
SIN4
RS485
MRI4-
X_MRI4-
Vcc
