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Technical Reference
Smartio C104H/PCI Series User’s Manual A-3
DB37 Connector Pinouts
The following lists the pin assignments of the Smartio C104H/PCI Series DB37
connector on the bracket. With this information, you may fabricate any type of fan-
out cables, such as DB37 to 4 x RJ45.
Pin no. Signal Pin no. Signal
1 20 RI3
2 DCD3 21 DTR3
3 GND 22 DSR3
4 CTS3 23 RTS3
5 RxD3 24 TxD3
6 RI4 25 DCD4
7 DTR4 26 GND
8 DSR4 27 CTS4
9 RTS4 28 RxD4
10 TxD4 29 RI2
11 DCD2 30 DTR2
12 GND 31 DSR2
13 CTS2 32 RTS2
14 RxD2 33 TxD2
15 RI1 34 DCD1
16 DTR1 35 GND
17 DSR1 36 CTS1
18 RTS1 37 RxD1
19 TxD1
Note: Make shield grounded to connector.