Campbell Scientific SC932 9-Pin to RS-232-DCE Interface - Manual (Page 8)

SC932 9-Pin to RS-232-DCE Interface
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3.2 One Way Communication
1. Remove the SC932 lid by removing the screw from the top of the box.
2. Jumper P3 between pins 3-4 to set the SC932 to one way data only. The
SC932 is activated by pin 6 synchronous device enable (SDE) on the
datalogger’s serial I/O port. See Figures 2 and 3.
3. Select the jumper configuration of P2 and P4 that will minimize power
requirements and yet still allow the SC932 to function. There are three
valid configurations of these jumpers. Having both P2 and P4 open will
require the least power. Jumpering P4 only is the middle power level.
Jumpering P2 only requires the most power. Modem devices which draw
power from the SC932 interface usually require one of the higher power
levels. If the RAD modem is being used, Section 4 describes the jumper
settings to use.
4. Replace the lid.
5. Connect the SC932 to the RS-232 device and to the datalogger with the
SC12 9 pin cable (included).
3.3 Two Way or One Way Communication
1. Remove the SC932 lid by removing the screw from the top of the box.
2. Jumper P3 between pins 1-2 and between pins 3-4 to set the SC932 for
two way or one way telecommunications. See Figures 2 and 3.
3. Select the jumper configuration of P2 and P4 that will minimize power
requirements and yet still allow the SC932 to function. There are three
valid configurations of these jumpers. Having both P2 and P4 open will
require the least power. Jumpering P4 only is the middle power level.
Jumpering P2 only requires the most power. Modem devices which draw
power from the SC932 interface usually require one of the higher power
levels. If the RAD modem is being used, Section 4 describes the jumper
settings to use.
4. Replace the lid.
5. Connect the SC932 to the RS-232 device and to the datalogger with the
SC12 9 pin cable (included).