Campbell Scientific CR6 CR6 Measurement and Control System - Page 78
RS-232 Ports, 2.2.5.3 USB Port, 2.2.5.4 Micro SD Card Slot, 2.2.5.5 SDI-12 Ports, 2.2.5.6
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Section 5. System Overview 5.2.2.5.2 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 RJ45 port, labeled RS-232, normally used to communicate with another manufacturer's modem or smart sensor. Purchase Campbell Scientific pn 31055 (male DTE) or pn 31056 (female DCE, null modem) as an adapter. Conventional RJ45 to RS-232 adapters are NOT compatible. Read More See the appendix Serial Port Pinouts (p. 583). • Two-terminal (TX and RX) RS-232 ports can be configured: o Two true RS-232 ports configured from C terminals. o Six TTL ports configured from U terminals. Note RS-232 ports are not isolated (p. 499). 5.2.2.5.3 USB Port One micro-B USB port, labeled USB, for communicating with a PC with datalogger support software (p. 493). The USB connection powers up the programming, configuration, and analog measurement features of the CR6. 5.2.2.5.4 Micro SD Card Slot A micro-SD card slot for a removable, supplemental, memory card 5.2.2.5.5 SDI-12 Ports Read More See the section Serial I/O: SDI-12 Sensor Support - Details (p. 269). 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 eight ports configured from C or U terminals. 5.2.2.5.6 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. • Up to four SDM ports configured from U or C terminals. 5.2.2.5.7 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 outputexpansion peripherals. CPI ports also enable networking between compatible Campbell Scientific dataloggers. 78
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