CPI

The data logger includes one RJ45 module jack labeled RS-232 Recommended Standard 232. A loose standard defining how two computing devices can communicate with each other. The implementation of RS-232 in Campbell Scientific data loggers to computer communications is quite rigid, but transparent to most users. Features in the data logger that implement RS-232 communications with smart sensors are flexible./CPI. CPI CPI is a proprietary interface for communications between Campbell Scientific data loggers and Campbell Scientific CDM peripheral devices. It consists of a physical layer definition and a data protocol. is a proprietary interface for communications between Campbell Scientific data loggers and Campbell Distributed Modules (CDMs) such as the GRANITE-Series peripheral devices and smart sensors. It consists of a physical layer definition and a data protocol. CDM devices are similar to Campbell Scientific SDM Synchronous Device for Measurement. A processor-based peripheral device or sensor that communicates with the data logger via hardwire over a short distance using a protocol proprietary to Campbell Scientific. devices in concept, but the CPI bus enables higher data-throughput rates and use of longer cables. Some GRANITE devices may require more power to operate in general than do SDM devices. Consult the manuals for GRANITE modules for more information.