Section 5. System Overview
5.3.2.5.2 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.
• One nine-pin DCE port, labeled RS-232, normally used to communicate with
a PC running datalogger support software
(p. 654), or to connect a third-party
modem. With a null-modem adapter attached, it serves as a DTE device.
Read More See the appendix Serial Port Pinouts
(p. 633).
• Two-terminal (TX and RX) RS-232 ports can be configured:
o Up to Four TTL ports, configured from C terminals.
Note RS-232 ports are not isolated
(p. 518).
5.3.2.5.3 Peripheral Port
Provided for connection of some Campbell Scientific CF memory card modules
and IP network link hardware. See the appendices Network Links List
(p. 652) and
Data Storage Devices — List
(p. 653). See the section Memory Card (CRD: Drive)
— Overview
(p. 89) for precautions when using memory cards.
Read More See the section TCP/IP
(p. 289).
• One multi-pin port, labeled Peripheral Port.
5.3.2.5.4 SDI-12 Ports
Read More See the section Serial I/O: SDI-12 Sensor Support — Details (p. 267).
SDI-12 is a 1200 baud protocol that supports many smart sensors. Each port
requires one terminal and supports up to 16 individually addressed sensors.
• Up to four ports configured from C terminals.
5.3.2.5.5 SDM Port
SDM is a protocol proprietary to Campbell Scientific that supports several
Campbell Scientific digital sensor and telecommunication input and output
expansion peripherals and select smart sensors.
• One SDM port configured from C1, C2, and C3 terminals.
5.3.2.5.6 CPI Port
CPI is a new proprietary protocol that supports an expanding line of Campbell
Scientific CDM modules. CDM modules are higher-speed input- and output-
expansion peripherals. CPI ports also enable networking between compatible
Campbell Scientific dataloggers.
• Connection to CDM devices requires a peripheral CPI interface as listed in
the appendix CDM/CPI Interfaces
(p. 647).
82
To Next Page
Loading...
Need help?
General
