Figure 14 - Microboard Serial Data Communications Ports - Johnson Controls YORK OPTIVIEW YK Series Service Instructions Manual

SECTION 3 - MICROBOARD 031-01730-000
TX RX
CR3 CR2
R
MICRO
TX RX
CR12 CR13
R
TX RX
CR16 CR11
R
TX RX
UART
CR15 CR14
R
TX RX
CR9 CR10
R
NOTES:
1. Microboard Program Jumper JP27 determines whether COM 4A or 4B can be used. 1 and 2 - 4A, 2 and 3, 4B.
2. J15-4 Loop-Around Test IN. J15-5 Loop-Around Test OUT. Refer to FIGURE 88 for details.

FIGURE 14 - MICROBOARD SERIAL DATA COMMUNICATIONS PORTS

44
G
G
3
JP27
2 1
G
G
G
OPTO-COUPLE
RS-232
TX
RX
COM 1
DTR
DSR
COM 4B
GTX
(NOTE 1)
GRX
RS-485
+
COM 4A
--
(NOTE 1)
+ 5VDC
GND
SHIELD
RS-232
DCD
DSR
RX
RTS
COM 2
TX
CTS
DTR
RS-485
COM 3
+ 5VDC
GND
SHIELD
TX
RX
COM 5
COMMON
NOTE 2
NOTE 2
FORM 160.54-M1
J2
4
3
PRINTER
5
2
7
MICRO-
6
8
GATEWAY
9
J11
3
2
NOT USED
1
4
5
J13
1
2
3
NOT USED
4
5
6
7
GND
9
J12
+
3
--
OPTIONAL I/O
2
1
(HOT GAS BYPASS)
4
5
J15
1
VSD
2
ACC BOARD
3
or
4
MOD "B" SSS
5
6
JOHNSON CONTROLS
LD07778