
SE59XX-SDK
Software development Kit
User Manual
V1.2
3.5.3
SE5901B Pin Assignments
DB9 to RS-232/RS-485/RS-422 connectors
Figure 3.5 DB9 Pin Number
Table 3.8 SE5901B Pin Assignment for DB9 to RS-232/RS-485 Connector
Pin#
RS-232
Full Duplex
RS-485
Half Duplex
1
DCD
N/A
2
RxD
N/A
3
TxD
Data+
4
DTR
N/A
5
SG (Signal Ground)
SG (Signal Ground)
6
DSR
N/A
7
RTS
Data-
8
CTS
N/A
9
RI
N/A
2 x 7-pin Male Terminal Block for RS-232/485(COM 1),RS-232(COM 2) Relay and DI
Figure 3.6 2 x 7-pin Male Terminal Block
Table 3.9 SE5901B 2 x 7-pin Male TB for RS-232/485(COM 1),RS-232(COM 2) Relay and DI pin-assignment
Pin#
DI and Relay
COM1 (RS-232)
COM1 (RS-485)
COM2 (RS-232)
1
DI1
Dedicated for DI/DO
Dedicated for DI/DO
Dedicated for DI/DO
2
DI2
Dedicated for DI/DO
Dedicated for DI/DO
Dedicated for DI/DO
3
Relay 1 -
Dedicated for DI/DO
Dedicated for DI/DO
Dedicated for DI/DO
4
Relay 1+
Dedicated for DI/DO
Dedicated for DI/DO
Dedicated for DI/DO
5
Relay 2 -
Dedicated for DI/DO
Dedicated for DI/DO
Dedicated for DI/DO
6
Relay 2+
Dedicated for DI/DO
Dedicated for DI/DO
Dedicated for DI/DO
7
Dedicated for COM
SG (Signal Ground)
SG (Signal Ground)
-
8
Dedicated for COM
Rx
-
-
9
Dedicated for COM
CTS
-
-
10
Dedicated for COM
Tx
Data +
-
11
Dedicated for COM
RTS
Data -
-
12
Dedicated for COM
-
-
SG (Signal Ground)
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