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Rice Lake
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JB1010
User Manual
14 pgs246.59 Kb0

Rice Lake JB1010 User Manual

JB1010
Ten-Channel Junction Box
Insta l l ati on
Manual
To be the best by every measure
36329
Contents
5.0 Trimming Load Cell Output...............................................................................................................4
5.1 Trimming Individual Cells ......................................................................................................................... 4
5.2 Trimming Cells in Sections .......................................................................................................................4
5.3 Trimming Both Individual Cells and Sections (Full Feature) .................................................................... 5
7.0 Switchbank SWA and SWB 1-8 Switch Functions ...........................................................................7
9.0 Schematic Drawing of Connector Section (Two Load Cells) ..........................................................9
Authorized distributors and their em ploy ees can view or download this manual from the Rice Lake
Weigh ing Systems distributor site at
com.
Copyright© 2010 Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifi cation subject to change without notice.
December 2010
www.rlws.
1.0 Introduction
SHD
–SIG
+SIG
–EXC +EXC +EXC
–EXC
+SIG
–SIG
SHD
CELL A CELL B
SHD
–SIG
+SIG
–EXC +EXC +EXC
–EXC
+SIG
-SIG SHD
SHD
–SIG
+SIG
–EXC +EXC +EXC
–EXC
+SIG
–SIG
SHD
CELL A
CELL B
SHD
–SIG
+SIG
–EXC +EXC +EXC
–EXC
+SIG
–SIG
SHD
CELL A
CELL B
SHD
-SIG
+SIG
–EXC +EXC +EXC
-EXC +SIG
–SIG
SHD
CELL A
CELL B
+EX +SE –EX –SE +SI –SI SHD
CELL
1A
CELL
3A
CELL/SECT 4B
CELL
5A
CELL/SECT 6B
CELL
7A
CELL/SECT 8B
CELL
9A
CELL/SECT 10B
SECT5
+EXC
SECT5
–EXC
SECT4
+EXC
SECT4
–EXC
SECT3
+EXC
SECT3
–EXC
SECT2
+EXC
SECT2
–EXC
SECT1
+EXC
SECT1
–EXC
TO INDICATOR
SECTION 1 SECTION 2 SECTION 3 SECTION 4 SECTION 5
JB1010
CELL/SECT 2B
CELL A CELL B
100KΩ
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
TRANSIENT PROTECTION
SW1B
SW1A
SW2B
SW2A
SW3B
SW3A
SW4B
SW4A
SW5B
SW5A
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
100KΩ
The JB1010 is a summing junction box and trimming device for up to ten strain gauge load cells. In new ap­plications that use a single junction box, the JB1010 can be custom con fi g ured to fi t many unique ap pli ca tions. It allows either signal or excitation trimming of three load cell arrangements: individual load cells, pairs of load cells in sec tions, or a combination of individual/and paired load cells. It allows use of an odd number of load cells without modifi cation.
As a re place ment board for existing applications in the fi eld—even as part of a multiple junction box trim ming network—the JB1010 can re place many boards. It is ide al as a single replacement product for many sep a rate boards for truck scales, tank scales, and track scales. This product can be used in multiple con fi g u ra tions. Most of these confi gurations are used to match existing systems using multiple junc tion boxes.
When the JB1010 is used as a re place ment for existing junction boxes, the confi guration characteristics of the other trim ming devices must be matched for proper operation. Help for de ter min ing the characteristics of exist-
ing devices will be found in Section 8.0, Using the JB1010 in an Existing System.
Standard JB1010 units have a local tran sient sup pres sion net work that provides zone pro tec tion against most light ning induced tran sients, par tic u lar ly when used with cell wiring in metal conduit.
In addition to the NEMA 4 FRP junction box, the JB1010 is also available as a board-only product.
Figure 1-1. JB1010 Board
1
2.0 Mounting the Enclosure
The JB1010 has 4.0" x 8.75" mount­ ing centers for #10 or 1/4" screws. Mount the en clo sure for proper ser vice access. Avoid mounting on weighbridges where vi bra tion and shock loads may loosen con nec tions and locations prone to fl ood ing.
8.750"
Mounting
The standard JB1010 has wa ter­ proof nylon cord grips to seal the
7.875"
4.000" Mounting
ca bles and pro vide strain relief. Ca ble diameters from 0.157" to
0.314" can be used with these grips. When in stall ing the cables into the enclosure, leave the strain re lief
Ø.313"
loose until the con nec tions have been rout ed with the en clo sure ful ly open. When com plet ed, tight en the grips with a wrench to pre vent wa ter
10.750"
from wicking into the box. To pre­vent water and other contaminants from entering the junction box, fi ll any unused cable grips with post screw plugs; P/N 19538.
If cables will be exposed to fl uids, bend a short down ward loop in all cables near the cord grips so any fl uids draining down the cables will drip off before reaching the junction box (see Figure 2-2).
Use a quality desiccant in the enclosure and replace it at least every six months. Replace it more often if the en vi ron ment is very damp or is regularly wetted down.
If using the transient protection grounding feature, install the fi ttings with a wrench and use an electrical grade lubricant such
®
as WD-40
on threads and fi ttings. Connect the ground lug to a single system ground rod (if locally connected) or to the ground­ing lug on the AC tran sient protector for the indicator or load cell power supply.
3.0 General Wiring Guide lines
The JB1010 is a universal trimming board, designed to trim almost any set of new or existing load cells in nearly
any confi guration. To properly wire the JB1010, fi rst determine what kind of application you have.
If the JB1010 is the only trimming junction box in a new system, continue on to the next page.
If the JB1010 replaces one or more boards in an existing system, skip to Section 8.0.
2
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