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APPENDIX
AP-9
Serial interface I/O circuit
COM1, 2, 3 port
Baud rate selectable from 4800 and 38400 (bps).
COM4, 5 port
Baud rate selectable from 4800 and 38400 (bps).
COM6 port
Baud rate selectable from 4800 and 38400 (bps).
LTC1535C
COM1_RD_B
COM1_RD_A
COM1_TD_B
COM1_TD_A
GND_ISO
GND2GND
COM1_JP
COM1_JP
RD
TD
GND
110Ω
LTC1535C
110Ω
GND2GND
TD
470Ω
PC400
COM4_JP
COM4_JP
COM4_2_RD_B
COM4_2_RD_A
COM4_TD_B
COM4_TD_A
GND_ISO
COM4_1_RD_H
COM4_1_RD_C
2.2kΩ
RD_2
GND
RD_1
LTC1535C
110Ω
GND2
2_RD
TD
GND
220Ω
PC400
2.2k
W
1_RD/A D_DATA
220Ω
PC400
AD_CLK
470Ω
2.2k
W
COM6_JP
COM6_JP
COM6_2_RD_B
COM6_2_RD_A
COM6_TD_B
COM6_TD_A
GND_ISO
COM6_1_RD_H
AD_DATA_H
COM6_1_RD_C/AD_DATA_C
AD_CLK_H
AD_CLK_C