Campbell SDMS40, Руководство по эксплуатации продукта

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FIGURE 7-3. 1-Position Terminal Connectors individually isolate wires
not used for SDI-12 measurements
If using RS-232, remove the connectors from the blue and yellow wires and attach the green wire
to one of the connectors (
FIGURE 7-4 (p. 9)).
FIGURE 7-4. Position Terminal Connector isolates wire
not used for RS-232 measurements
Table 7-2 (p. 9) provides SDI-12 wiring and Table 7-3 (p. 10) provides RS-232 wiring. Once
mounting and wiring of the SDMS40 are complete, apply power to the SDMS40.
Table 7-2: SDI-12 sensor wire color, function, and data logger connection
Wire color Function
Power supply
terminal
Data logger connection
terminal
Black Power ground G
Red Power 12V
Green SDI-12 signal
C or U
1
terminal configured for
SDI-12
Brown Signal ground ⏚ (analog ground)
1
U or C terminals are automatically configured by the measurement instruction.
If multiple SDI-12 sensors are connected to a data logger, Campbell Scientific recommends using
separate terminals when possible. However, multiple SDI-12 sensors can connect to the same
data logger control or U terminal. Each must have a unique SDI-12 address. Valid addresses are 0
through 9, a through z, and A through Z.
SDMS40 Multipoint Scanning Snowfall Sensor 9