User Manual

User’s Manual
EBM-QM87U User’s Manual
23
2.3.11 Serial port 2 connector (JCOM2)
RS-232 Mode
Signal
PIN
PIN
Signal
NRXDB#
2
1
NDCDB
NDTRB#
4
3
NTXDB
NDSRB#
6
5
GND
NCTSB#
8
7
NRTSB#
NC
10
9
NRIB#
RS-422 Mode
Signal
PIN
PIN
Signal
485TXP
2
1
485TXN
485RXN
4
3
485RXP
NC
6
5
GND
NC
8
7
NC
NC
10
9
NC
RS-485 Mode
Signal
PIN
PIN
Signal
485TXP
2
1
485TXN
NC
4
3
NC
NC
6
5
GND
NC
8
7
NC
NC
10
9
NC