SDM-SIO1A and SDM-SIO4A Serial Input/Output Modules
7
Main body including base
mounting flange
Height:
64 mm (2.52 in)
Width:
85 mm (3.35 in)
Depth:
23 mm (0.91 in)
70 g
76.2 mm (3.0 in)
5.4.2 SDM-SIO4A
Weight:
Mounting cent
re
s:
Main body
Height:
64 mm (2.51 in)
Width:
154 mm (6.06 in)
Depth:
22 mm (0.86 in)
Main body including base
mounting flange
Height:
64 mm (2.52 in)
Width:
188 mm (7.40 in)
Depth:
23 mm (0.91 in)
Weight:
180 g
Mounting cent
re
s:
177.8 mm (7.0 in)
5.5 Datalogger Compatibility
The SDM-SIO1A is compatible with our CR6-series, CR800-series, CR1000,
CR3000, CR5000, and CR9000X dataloggers. The CR5000 and CR9000X
operating system must be OS 6 or higher.
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
(p. 8)
, if there is more than one
SDM device.) After mounting as close to the datalogger as possible (to
minimize the cable runs), the interface is connected to the datalogger SDM and
power connections. Refer to Section
(p. 9)
, for
further details.
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 Campbell Scientific’s
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 Section
(p. 8)
). Care must be
taken when interpreting any wiring instructions generated by
Short Cut
to