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FORM 50.40-OM2
79YORK INTERNATIONAL
FIG. 35 – MICROBOARD SERIAL DATA COMMUNICATIONS PORTS
LD06749
NOTE:
1. Microboard Program Jumper JP27 determines whether COM 4A or 4B can be used. 1 & 2 - 4A, 2 & 3, 4B. Refer to Table 2.
MICRO
UART
COM 1
COM 4B
(NOTE 1)
COM 4A
(NOTE 1)
COM 2
COM 3
COM 5
OPTO-COUPLE
RS-485
RS-232
RS-485
RS-232
MICROGATEWAY
PRINTER
NOT USED
NOT USED
CONNECTION
TO CHILLER /
CONDENSING
CONTROL PANELS
NOT USED
4
3
5
2
7
6
8
9
3
2
1
4
5
1
2
3
4
5
6
7
9
3
2
1
4
5
1
2
3
4
5
6
J2
J11
J13
J12
J15
TX
RX
COMMON
NOTE 2
NOTE 2
+
--
+ 5VDC
GND
SHIELD
DCD
DSR
RX
RTS
TX
CTS
DTR
GND
--
+ 5VDC
GND
SHIELD
+
TX
RX
DTR
DSR
GTX
GRX
12
3
TX1 RX1
TX4 RX4
TX2 RX2
TX3
RX3
TX5
RX5
JP27
5