SMAR LD292, Руководство по эксплуатации, техническому обслуживанию и инструкциям

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Installation
1.9
WARNING
The unused cable entries should be plugged and sealed accordingly to avoid humidity entering,
which can cause the loss of the product’s warranty.
The electronic housing can be rotated to adjust the digital display on a better position. To rotate it,
loose the Housing Rotation Set Screw, see Figure 1.4 (a). To prevent humidity entering, the electric
housing and the sensor joint must have a minimum of 6 fully engaged threads. The provided joint
allows 1 extra turn to adjust the position of the display window by rotating the housing clockwise. If
the thread reaches the end before the desired position, then rotate the housing counterclockwise,
but not more than one thread turn. Transmitters have a stopper that restricts housing rotation to one
turn. See Section 4, Figure 4.1.
COVER
LOCKING
SCREW
HOUSING ROTATION
SET SCREW
(a) (b)
Figure 1.4 - Cover Locking and Housing Rotating Set Screw (a) Electronic Board Side
(b) Terminal Connection Side
Wiring
To access the wiring block, loosen the cover locking screw to release the cover. See Figure 1.4 (b).
The
LD292 is protected against reverse polarity, and can withstand ±35 VDC without damage, and
will not work if connected in reverse polarity.
For convenience there are three ground terminals: one inside the cover and two externals, located
close to the conduit entries, see figure 1.5.
The
LD292 uses the 31.25 kbit/s voltage mode option for the physical signaling. All other devices on
the same bus must use the same signaling. All devices are connected in parallel along the same
pair of wires.
Figure 1.5 - Terminal Block
Various types of Fieldbus devices may be connected on the same bus.
The
LD292 current consumption quiescent is 12 mA.