Rice Lake EL304A Signal Trim Junction Box - Manual (Page 2)

1
Introduction
The EL-304A Junction Box can accommodate up to four load cells. Additional
load cells may be connected to the EL-304A Junction Box by wiring additional
junction boxes to the EXPANSION terminal on the EL-304A. Load cell output can
be trimmed with potentiometers either individually or paired in sections.
When correctly installed, the NEMA 4X fiberglass-reinforced polyester enclosure
will withstand 40 psi water pressure. It is not, however, designed for high-
pressure washdown applications, exposure to steam, or exposure to high-
temperature liquids.
Mounting the Junction Box Enclosure
Mount the enclosure in a location convenient for servicing and away from
standing water. Try to mount the enclosure in a location that will not require
extending the load cell cables.
Depending on the mounting surface, the enclosure is attached using the four pan-
head screws provided, bolts, or other suitable masonry fasteners. Figure 1 below
shows dimensions for mounting the enclosure.
FIGURE 1: EL-304A ENCLOSURE DIMENSIONS
CHANGING CABLE LENGTH
Locate the junction box so load
cell cable length need not be
changed. Load cell output is
temperature-compensated for the
supplied cable length. Altering
that length will alter the cell’s
signal output.
© 1996 Rice Lake Weighing Systems, Inc., Rice Lake, WI USA. All Rights Reserved
Rice Lake Weighing Systems, Inc., 230 West Coleman Street, Rice Lake, WI 54868
Main Office (715) 234-9171 Service (715) 234-2003 FAX (715) 234-6967
RICE LAKE WEIGHING SYSTEMS
6.62"
(168.1mm)
9.88" (251mm)
3.25"
(82.6mm)
1.38" (35.1mm)
5.625"
(142.8mm)
7.625" (193.6mm)
12/96