Campbell Scientific SDM-CAN Datalogger to CANbus Interface - Manual (Page 15)

SDM-CAN Datalogger-to-CANbus Interface
This jumper block
is used to select
isolated or non-
isolated CAN-Bus
interface. The
jumper block can
be removed and
rotated so that the
red bar is nearest
to the mode arrow
head. The default
is for isolation
enabled.
Transmission of
CAN data is
hardware
disabled
by default. To
enable transmission,
move the jumper to
the TX enable
position.
The CAN-Bus
termination
impedance is
disabled by default.
If you need the bus
to be terminated,
then move the
jumper to the 120R
IN position.
The DC-DC converter is off by
default. This will reduce power
consumption from the +12V
supply but means that the isolated
circuits must be powered
externally. To enable the DC-DC
converter move the jumper to the
DC-DC ON position.
SDM-CAN PCB
Once the case lid
has been removed.
OBSERVE ANTI-
STATIC
PRECAUTIONS.
FIGURE 2-1. SDM-CAN Internal Jumpers
FIGURE 2-2. SDM-CAN Isolation enabled (default)
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