Vishay DXP10, Руководство оператора, Страница: 10 / 42

2-2
Figure 2-2. Load Cell Connections.
2.3 ELECTRICAL
2.3.1 Transducer Inputs.
Up to four load cells can be connected to the
summing circuit within the DXp. Connect individual
load cells directly to the circuit board connectors
as shown in Figure 2-2. Excitation and signal
connection locations are dearly marked according
to function and standard color code.
If more than four cells are required, an external
308A summing junction box must be used. Make
all load cell connections in the 3084 unit, not the
DXp-10/15. Connect the output leads of the 3084
summing box to the load cell #1 terminal blocks in
the DXp. Sense leads from the 3084 must be
connected to the sense terminal blocks in the
DXp-10/15 (Figure 2-2). Jumpers JF1 and JP2
must be removed.
2.3.2 Serial Communication.
If a deadweight or substitution method of
calibration is being used, the load cal cable can be
shortened as required. The leads should be re-
tinned before the final connection is made.
NOTE: If tension or universal load cells are used,
red (-signal) and white (+ signal) leads may need
to be reversed.
A terminal connector is provided for RS 485 wire
connections (Figure 2-3). Multiple DXp
transmitters, networked together, are wired in a
parallel configuration with a termination jumper
installed on the last instrument. A pair of twisted
wires (14-20 gauge) is all that is required for
interconnection. Communication lines should not
be run near ac voltage power lines.
Figure 2-4. Ac Power Connections and Fuse