Rice Lake JB1010 Signal/Excitation Trim - Manual (Page 4)

1
The JB1010 is a summing junction box and trimming device for up to ten strain gauge load cells. In new ap-
plications 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.
1.0 Introduction
Figure 1-1. JB1010 Board
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
100K
Ω
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
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω
100K
Ω