Campbell Scientific SDM-CAN Datalogger to CANbus Interface - Manual (Page 17)

SDM-CAN Datalogger-to-CANbus Interface
the tip of a small flat blade screw driver (3mm width) into the rectangular hole
above the circular terminal hole. Push in the blade of the screwdriver until the
spring is released and the terminal opens. Insert the pre-stripped wire and then
remove the screwdriver. See FIGURE 2-4. If space is limited, as when the unit
is mounted in an enclosure etc., the screwdriver can be inserted into the front of
the terminal block to push open the spring, as shown in FIGURE 2-5.
FIGURE 2-4. Using the Spring Loaded Terminal Blocks (Top Option)
FIGURE 2-5. Using the Spring Loaded Terminal Blocks (Front Option)
Where you need to install more than one wire in a single terminal connector,
use only stranded wires and twist the wires together before inserting them in
the terminal. This type of terminal is not suitable for use with multiple solid
core wires unless the wires are joined externally, e.g. using a ferrule.
Route the wires from the SDM-CAN interface to the datalogger connections
using the shortest route. Avoid running them near cables which could cause
noise pickup. In noisy environments use low capacitance signal cable with an
overall foil screen, connecting the screen to the datalogger power ground.
Where multiple SDM devices are in use connect them in parallel to datalogger
SDM ports, making sure each device has a unique SDM address. Ensure that
the maximum cable length between the datalogger and the SDM-CAN does not
exceed 3 meters.
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