Sam4s ER-900 Series Service Manual page 103

9-11 OPTION SERIAL 2P(RJ45+RJ45) PBA Block Diagram
9-12 PRT JOINT(R/J) PBA Wiring connection
CN1 (SERIAL#3,#4 RJ-45 MODULAR TYPE)
NO SIGNAL NAME
1 COM#3_RTS_OUT
2 GND
3 COM#3_CTS_IN
4 COM#3_RTS_OUT
5 COM#3_RXD_IN
6 COM#3_TXD_OUT
7 COM#3_CTS_IN
8 VSERIAL50V(COM3&4)
SAM4S ER-900/SPS-300 SERIES
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NO SIGNAL NAME
9 COM#4_RTS_OUT
10 GND
11 COM#4_CTS_IN
12 COM#4_RTS_OUT
13 COM#4_RXD_IN
14 COM#4_TXD_OUT
15 COM#4_CTS_IN
16 VSERIAL50V(COM3&4)
CN2 (I/F B'D to OPTION B'D CONNECTOR)
NO SIGNAL NAME NO
1 COM#4_CTS 9
2 N.C 10
3 COM#4_RTS 11
4 N.C 12
5 COM#4_TXD 13
6 N.C 14
7 COM#4_RXD 15
8 GND 16
9 Wiring Diagram
SIGNAL NAME
COM#3_CTS
GND
COM#3_RTS
N.C
COM#3_TXD
VSERIAL50V(COM3&4)
COM#3_RXD
VDD33V
9-9