User's Manual

8 Documentation Number 232OPSDA1397 Manual
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH [phone] -- FAX [phone]
Table 2.2 - RS-232 Connector Pinout
Table 2.3 - 232OPSDA To DTE Connections
Table 2.4 - 232OPSDA To DCE Connections
DB25S
Pin # Signal
232OPSD
A Function Notes
2 Transmit Data (TD) Input Connection is required.
3 Receive Data (RD) Output Connection is required.
4 Request to Send (RTS) Input Used for power.
5 Clear to Send (CTS) Internally connected to
RTS (pin 4).
6 Data Set Ready (DSR) Internally connected to
DTR (pin 20).
7 Signal Ground (SG) Connection is required.
8 Data Carrier Detect (DCD) Internally connected to
to DTR (pin 20).
12 Signal Ground (SG)
20 Data Terminal Ready
(DTR)
Input Used for power.
25 Optional Power Supply
Connection
Connect Power Supply
to this pin if RTS and
DTR are not available
232SPDA
Pin # Signal
DTE DB-25
Connection
DTE DB-9
Connection
2 Transmit Data (TD) 2 3
3 Receive Data (RD) 3 2
4 Request to Send (RTS) 4 7
5 Clear to Send (CTS) 5 8
6 Data Set Ready (DSR) 6 6
7 Signal Ground (SG) 7 5
8 Data Carrier Detect (DCD) 8 1
20 Data Terminal Ready (DTR) 20 4
232OPSDA
Pin # Signal
DCE DB-25
Connection
DCE DB-9
Connection
2 Transmit Data (TD) 3 2
3 Receive Data (RD) 2 3
4 Request to Send (RTS) 5 8
5 Clear to Send (CTS) 4 7
6 Data Set Ready (DSR) 20 4
7 Signal Ground (SG) 7 5
8 Data Carrier Detect (DCD) N/C N/C
20 Data Terminal Ready (DTR) 6 6