Appendix a. cs i/o port – Campbell Scientific NL100 Network Link Interface User Manual
Page 31
Appendix A. CS I/O Port
The CS I/O port is Campbell Scientific's input/output port. It is not a standard
RS-232 pin-out. The following table provides pin-out information on the port
when connected to a datalogger.
Pin
Name
Signal
Type
Description
1
5 V (supplied by the
datalogger)
Input
Not used by NL100/105
2
Signal Ground
Provides reference for voltage
levels
3
Ring
Output
Raised by a NL100/105 to put
the datalogger into the
telecommunications mode
4
RXD
Output
Serial data transmitted to the
datalogger
5
Modem Enable
Input
Raised by the datalogger when
it determines that the
NL100/105 raised the ring line
6 Synchronous
Device
Enable
Input
Used by the datalogger to
address the NL100/105 when
the NL100/105 is configured
as a synchronous device
7
Clock/Handshake
Input
Used by the datalogger with
SDE and TXD lines to address
and transfer data to
synchronous devices
8
12 V (supplied by the
datalogger)
Not used by the NL100/105
9 TXD
Input
Serial
data received from the
datalogger
A-1