Campbell Scientific SDS122 Two-Way Serial Data Switch - Manual (Page 7)

SDS-122 SERIAL DATA SWITCH
3
Switched Datalogger Port B
FIGURE 3. Pin Positions for Switched
Datalogger Port ‘B’: 9-way Female ‘D’ Type
Connector
The switched datalogger port (marked ‘PORT
B’ in Figure 1) is a 9-way female ‘D’ type
connector, having the following pin
configuration:
PIN ABBREVIATION I/O
1 +5V
2 0V
3 RING I
4 RX I
5 ME O
6 SDE/PE O
7 CLK/HS O
8 Not connected
9 TX O
25-Way Switched RS232 Port A
FIGURE 4. Pin Positions for Switched RS232 Port ‘A’: 25-way Female ‘D’ Type Connector
The 25-way switched RS232 port (marked ‘RS232 PORT A’ in Figure 1) is a 25-way female ‘D’ type
connector, having the following pin configuration:
PIN ABBREVIATION INPUT/OUTPUT
DTE DCE
1 Frame Ground
2 TX O I
3 RX I O
4 RTS O I
5 CTS I O
6 DSR I O
7 GND
15 External Power Supply I I
20 DTR O I
Other pins are not connected.
5 4 3 2 1
9 8 7 6
25 14
SERIAL I/O
13 1