Campbell CR1000

Appendix C. Serial Port Pinouts
send the data, and return to sleep mode with no 40 second timeout.
Table 189. Standard Null-Modem Cable or Adapter-Pin
Connections
DB9 Socket # DB9 Socket #
1 & 6 ——————————— 4
2 ——————————— 3
3 ——————————— 2
4 ——————————— 1 & 6
5 ——————————— 5
7 ——————————— 8
8 ——————————— 7
9
most null modems have no
connection
1
9
1
If the null-modem cable does not connect pin nine to pin nine, the modem will need to be
configured to output a RING (or other characters previous to the DTR being asserted) on the
modem TX line to wake the datalogger and activate the DTR line or enable the modem.
635