Campbell Scientific CR3000 CR3000 Micrologger - Page 354
Telecommunications and Data Retrieval
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Section 8. Operation 8.4 Telecommunications and Data Retrieval Telecommunications, in the context of CR3000 operation, is the movement of information between the CR3000 and another computing device, usually a PC. The information can be programs, data, files, or control commands. Telecommunications systems require three principal components: hardware, carrier signal, and protocol. For example, a common way to communicate with the CR3000 is with PC200W software by way of a PC COM port. In this example, hardware are the PC COM port, the CR3000 RS-232 port, and a serial cable. The carrier signal is RS-232, and the protocol is PakBus®. Of these three, a user most often must come to terms with only the hardware, since the carrier signal and protocol are transparent in most applications. Systems usually require a single type of hardware and carrier signal. Some applications, however, require hybrid systems that utilize two or more hardware and signal carriers. Contact a Campbell Scientific applications engineer for assistance in configuring any telecommunications system. Synopses of software to support the various telecommunications devices and protocols are found in Support Software (p. 76, p. 404). Of special note is Network Planner, a LoggerNet client designed to simplify the configuration of PakBus telecommunications networks. 8.4.1 Hardware and Carrier Signal Campbell Scientific supplies or recommends a wide range of telecommunications hardware. Table CR3000 Telecommunications Options (p. 354) lists telecommunications destination, device, path, and carrier options which imply certain types of hardware for use with the CR3000 datalogger. Information in table CR3000 Telecommunications Options (p. 354) is conceptual. For specific model numbers and specifications, see the appendix Telecommunications Hardware, contact a Campbell Scientific applications engineer, or go to www.campbellsci.com. Table 86. CR3000 Telecommunications Options Destination Device / Portal Communications Path PC / COM or USB Direct Connect PDA / COM Port Direct Connect PC / COM Port Digital Cellular PC / COM Port Multidrop PC / Network Card Ethernet / PPP PC / COM Port Spread Spectrum RF PC / COM Port Licensed Frequency RF PC / COM Port Short-haul Telephone PC / COM Port Land-line Telephone PDA / Infrared Port Infrared Carrier Signal RS-232 RS-232 800 MHz RF RS-485 IP 900 MHz RF UHF VHF RF CCITT v.24 CCITT v.92 SIR 354