Section 5.    Overview 
 
 
The CR800 is equipped with hardware ports that allow communication with other 
devices and networks, such as: 
•  PC 
•  Smart sensors 
•  Modbus and DNP3 networks 
•  Ethernet 
•  Modems 
•  Campbell Scientific PakBus networks 
•  Other Campbell Scientific dataloggers 
•  Campbell Scientific datalogger peripherals 
Communication ports include: 
•  CS I/O 
•  RS-232 
•  SDI-12 
•    SDM 
•    CPI (requires a peripheral device) 
•    Ethernet (requires a peripheral device) 
•    CS I/O Port 
Read More    See Serial Port Pinouts
 (p. 553). 
•  One nine-pin port, labeled CS I/O, for communicating with a PC or 
modem through Campbell Scientific communication interfaces, modems, 
or peripherals.    CS I/O comms interfaces are listed in the appendix 
Serial I/O Modules — List
 (p. 563). 
Note Keep CS I/O cables short (maximum of a few feet). 
 
5.1.1.4.1 RS-232 Ports 
Note RS-232 communications normally operate well up to a transmission 
cable capacitance of 2500 picofarads, or approximately 50 feet of 
commonly available serial cable.