Communications specifications

A data logger is normally part of a two-way conversation started by a computer. In applications with some types of interfaces, the data logger can also initiate the call (callback) when needed. In satellite applications, the data logger may simply send bursts of data at programmed times without waiting for a response.

Ethernet Port: RJ45 jack, 10/100/1000 Base Mbps, full and half duplex, Auto-MDIX, magnetic isolation, and TVS surge protection, IEEE 802.3 compliant. See also Ethernet communications option.

Internet Protocols: Ethernet, PPP, RNDIS, ICMP/Ping, Auto-IP(APIPA), IPv4, IPv6, UDP, TCP, TLS (v1.2), DNS, DHCP, SLAAC, Telnet, HTTP(S), SFTP, FTP(S), POP3/TLS, NTP, SMTP/TLS, SNMPv3, CS I/O IP

Additional Protocols: CAN, CAN FD, CPI, EPI, PakBus, PakBus Encryption, SDM, SDI-12, Modbus RTU / ASCII / TCP, DNP3, custom user definable over serial, NTCIP, NMEA 0183, I2C, SPI

USB Device: Micro-B device for computer connectivity

USB Host: USB 2.0 full speed host 12 Mbps, Type-A for mass storage devices

CS I/O: 9-pin D-sub connector to interface with Campbell Scientific CS I/O peripherals.

0 – 5 V Serial(C1 to C8): Eight independent TX/RX pairs

SDI-12 (C1, C3, C5, C7): Four independent SDI-12 compliant terminals are individually configured and meet SDI-12 Standard v 1.4.

RS-485 (C1 to C8): Four half duplex. Optional 120 Ohm termination resistor between pairs.

RS-422 (C1 to C8): Two full duplex or four half duplex. Use RS‑485 configuration.

RS-232 (C1 to C8): Four independent Tx/Rx pairs.

CPI A/B and RS-232 A/B: Two RJ45 module ports that can operate in one of two modes: CPI or RS-232. CPI interfaces with Campbell Scientific CDM measurement peripherals and sensors. RS-232 connects, with an adapter cable, to computer, sensor, or communications devices serially.

CAN (GRANITE 10 only): Four general purpose ports, CAN 2.0 up to 1 Mbps, or CAN FD up to 5 Mbps. Screw terminal or DSUB 15-pin connections. Supports DBC files.

EPI: One EPI bus. 100 Mbps data rate. IEEE 1588 synchronization to 50 nS. 100 m (330 ft) maximum cable length per network connection. Up to 15 devices. EPI is a proprietary interface for communications between Campbell Scientific data loggers and Campbell Scientific CDM peripheral devices. It is based on Ethernet and IEEE 1588 Precision Time Protocol. It consists of a physical layer definition and a data protocol.

CPI: Two independent CPI buses. Up to 1 Mbps data rate each. Synchronization of devices to 5 μS. Total cable length up to 610 m (2000 ft). Up to 20 devices per bus. 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.

Wireless: Wi-Fi

Hardwired: Multi-drop, short haul, RS-232, fiber optic

Satellite: GOES, Argos, Inmarsat Hughes, Irridium