Section 5. Overview
66
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.
5.1.1.4.5 SDM Port
SDM is a protocol proprietary to Campbell Scientific that supports several
Campbell Scientific digital sensor and comms input and output expansion
peripherals and select smart sensors.
•
One SDM port configured from SDM-C1, SDM-C2, and SDM-C3
terminals.
5.1.1.4.6 CPI Port and CDM Devices — Overview
Related Topics:
• CPI Port and CDM Devices — Overview
(p. 66)
• CPI Port and CDM Devices — Details
(p. 494)
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. Consult the manuals for CDM modules for
more information.
•
Connection to CDM devices requires the SC-CPI interface.
5.1.1.4.7 Ethernet Port
Read More See the section TCP/IP — Details
(p. 468).
•
Ethernet capability requires a peripheral Ethernet interface device, as
listed in Network Links — List
(p. 612).
5.1.1.5 Grounding — Overview
Related Topics:
• Grounding — Overview
(p. 66)
• Grounding — Details
(p. 106)
Proper grounding lends stability and protection to a data acquisition system. It is
the easiest and least expensive insurance against data loss — and often the most
neglected. The following terminals are provided for connection of sensor and
CR3000 datalogger grounds:
•
Signal ground reference for single-ended analog inputs, pulse
inputs, excitation returns, and as a ground for sensor shield wires. Signal
returns for pulse inputs should use
terminals located next to the pulse
Summary of Contents for CR3000 Micrologger
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