Section 5. System Overview
• SDI-12 devices: C
• Synchronous Devices for Measurement (SDM): C
• Smart sensors: C terminals, RS-232 port, and CS I/O port with the
appropriate interface.
• Modbus or DNP3 network: RS-232 port and CS I/O port with the appropriate
interface
• Other serial I/O devices: C terminals, RS-232 port, and CS I/O port with the
appropriate interface
5.1.6.1 SDI-12 Sensor Support — Overview
Related Topics:
• SDI-12 Sensor Support — Overview (p. 72)
• SDI-12 Sensor Support — Details (p. 363)
• Serial I/O: SDI-12 Sensor Support — Programming Resource (p. 267)
• SDI-12 Sensor Support — Instructions (p. 555)
SDI-12 is a smart-sensor protocol that uses one SDI-12 port and is powered by 12
Vdc. It is fully supported by the CR1000 datalogger. Refer to the chart CR1000
Terminal Definitions
(p. 76), which indicates C terminals that can be configured for
SDI-12 input. For more information about SDI-12 support, see section Serial I/O:
SDI-12 Sensor Support — Details
(p. 267).
5.1.6.2 RS-232 — Overview
The CR1000 has 6 ports available for RS-232 input as shown in figure Terminals
Configurable for RS-232 Input
(p. 73).
Note With the correct adapter, the CS I/O port can often be used as an RS-232
I/O port.
As indicated in figure Use of RS-232 and Digital I/O when Reading RS-232
Devices
(p. 73), RS-232 sensors can often be connected to C terminal pairs
configured for serial I/O, to the RS-232 port, or to the CS I/O port with the proper
adapter. Ports can be set up for baud rate, parity, stop-bit, and so forth as
described in CRBasic Editor Help.
72
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