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Main body including base
mounting flange
Height:
Width:
Depth:
Weight:
Mounting centres:
5.5 Data logger compatibility
The SDM-SIO1A is compatible with our CR6-series, CR1000X, CR800-series, CR3000, and CR1000
data loggers.
6. Installation
The SDM-SIO1A is an addressable interface; therefore, before use, its SDM address needs to be
set by rotating the switch on the side of its case using a screwdriver. If there is only one SDM
device, the address can be left at the default of 0. (Refer to
one SDM device.) After mounting as close to the data logger as possible (to minimize the cable
runs), the interface is connected to the data logger SDM and power connections. Refer to
Connection and wiring
Study the documentation of the serial device you want to connect to the SDM-SIO1A to
determine the most appropriate method of connection for the application, for example, RS-232
or RS-485/RS-422, half or full duplex. Generally, RS-485/RS-422 connections are used for cable
runs over 50 m (164 ft) if the device supports them. Once decided, connect the wires to the
relevant SDM-SIO1A terminals. Make sure a connection is made between the ground
connections of the two devices. Use the RG terminal on the SDM-SIO1A for RS-485/422
connections.
Some serial sensors are supported by the Campbell Scientific Short Cut program. The
SDM-SIO1A can be used with those programs simply by selecting the relevant serial port number
to match the SDM-SIO1A (defined by the SDM address of the SDM-SIO1A, see
Care must be taken when interpreting any wiring instructions generated by Short Cut to account
for the differences in wiring a sensor to the SDM-SIO1A rather than directly to the data logger.
64 mm (2.52 in)
188 mm (7.40 in)
23 mm (0.91 in)
180 g
177.8 mm (7.0 in)
(p. 11) for further details.
SDM-SIO1A and SDM-SIO4A Serial Input/Output Modules
Mounting
[p. 9] if there is more than
Mounting
[p. 9]).
8
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