Chapter 3 | Replacing parts
5. Remove the cable wires from the summing block. Note: Make sure to make note of
where the wires are connected before removing (Figure 3.39).
TO LOAD CELL 3TO LOAD CELL 1
TO LOAD CELL 2
YELLOW
GREEN
WHITE
YELLOW (LONG)
RED
BLACK
BLUE
+EXE
LC2
+SIG
SHLD
–SIG
–EXE
+EXE
+SIG
SHLD
–SIG
–EXE
+EXE
+SIG
SHLD
–SIG
–EXE
+EXE
+SIG
SHLD
–SIG
–EXE
LC4
LC1
LC3
LOAD CELL POTENIOMETER
+EXE
+SEN
SHLD
–SIG
+SIG
–SEN
–EXE
AUX
INPUT
+EXE
+SEN
SHLD
–SIG
+SIG
–SEN
–EXE
WHITE
YELLOW
GREEN
BLACK (SHIELD)
BLACK
RED
BLUE
TO ANALOG INDICATOR
Tie the grey and pink wires shield
Wiring colors shown are for the suggested Mettler
Toledo cable. If another cable is used, it is up to the
manufacturer to determine a wiring schematic. This
schematic must be kept on file and provided when
asked for. A standard cable should be decided on and
wired per a standard schematic.
Note:
Do not cut load cell cables to length.
Use original cable and length provided from vendor.
All cables must be the same length.
YELLOW
YELLOW
GREEN
GREEN
WHITE
WHITE
YELLOW (LONG)
YELLOW (LONG)
RED
RED
BLACK
BLACK
BLUE
BLUE
Mettler Toledo
Summing Block
Note:
Do not cut load cell cables to length.
Use original cable and length provided from vendor.
All cables must be the same length.
Figure 3.39. Wiring diagram showing connections from the load cell cables to the Mettler
Toledo Summing Block.
6. Loosen and remove cables from the liquid tight fitting (Figure 3.40). There are three
in total.
Liquid tight(s)
Center liquid tight
Figure 3.40. Location of load cell cables and liquid
tight fittings.
Thermo Scientific 28DynaDrive S.U.B. Service Guide
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