Rice Lake SURVIVOR PL Rail Scale - Manual (Page 14)

10
Survivor ® PL
Installation Manual
Be certain each load cell grounding strap is securely connected to the top plate and bottom plate of each load cell
mount. There should be metal-to-metal contact with no presence of paint or grout. This strap is designed to channel
power surges on the deck around—rather than through—the load cell to ground.
Grounding
Strap
Figure 3-2. Grounding Strap on Load Cell Mount
These, and all, ground connections must be torqued to a specified value and retorqued at regular service intervals.
A thick coating of anti-oxidant grease should be maintained on all ground connections to prevent corrosion.
A separate grounding system conductor must extend uninterrupted from the main service panel ground to the scale
to protect load cells and scale wiring from lightning and other transient damage. This ground wire conductor must
be an unsheathed #10 copper wire or larger. Run the bare ground wire conductor intact from the AC power ground
rod to the scale in a separate trench. Bring the wire up from the trench near the junction box and attach it to the
ground lug of the junction box. A #10 bare ground wire is run from the ground lug of the junction box to one of the
junction box mounting studs on the scale frame, thus grounding the scale frame to the same single-point ground as
the AC power for the indicator.
To DC Protection Ground
Connection before Indicator
10 ga. Bare Ground Wire
Ground Lug
R41
JP17
JP7
R52
R50
R40
R24
R14
R15
JP20
JP10
R26
R5 1
R49
R47
JP16
R45
R43
JP9 R23
R21
JP6
JP8 R17
R38
R36
R34
JP11
R32
R30
R28
R10
R8
JP1
R4
R2
R33
JP12
JP2
VR9
JP19 R48
VR7
JP18
R42
R44
R22
R25
R16
R18
VR 2
R19
R39
VR10
R35
R3 7
VR11
R27
R29
R31
R9
R11 R12
R1
R3
R5
VR 5
R6
JP5
JMP/NEG JMP/POS
VR8
VR 3
VR1
VR12
VR 6
J1
VR4
J2 R13
R7
EXPANSION/J9
J5 ARC
R46
JP4
JP3
ARGND
JP14
JP15
JP13
L3
L4
L2
J8
J4
J3
J6
L1 R20
J7
INDICATOR/J10
JP
TRIM
TRIM
TO
-EX
+EX
+SI
-EX
+EX
+SI
-EX
+EX
1 +SI
-EX +EX
+SI
JP
JP
TO
SIGNAL
2005
SIGNA L
CU T TO
DISABL E
CUT
CELL#
CELL#
CELL#
SHD
1
SHD
-SI
1
-SI
SHD
-SI
1
-SI
SHD
SIGNAL
CU T TO
CUT
SECT# DISABL E
CELL#
CELL#
SIGNAL
SIGNAL
SIGNA L
D L D
DISABL E
CELL#
SECT# DISABL E
CELL#
RICE LAKE WEIGHING SYSTEM
S
JP
-EX
+EX
+SI
-EX
+EX
+SI
-EX
+EX
+SI
-EX
+EX
+SI
SIGNAL
TRIM
TRIM
TRIM
TRIM
TRIM
TRIM
Assembly
-EX
-EX
+EX
+SI
SHD
1 SHD
-SI
1
-SI
1
-SI
SHD
1
-SI
SHD
CONNECT BOTH SHUNTS TO APPLY SIGNAL
SECT#
SIGNA L
SIGNA L
SIGNA L
CELL#
PN Rev.
+SI -SI
-SI
SECT#
+SEN
SHD
+SEN
SHD
DISCONNECT BOTH SHUNTS TO REMOVE SIGNAL
+EX -SEN
-SEN
CUT TRACE TO ISOLATE SENSE LINE
Transient Board Connectors
Grounding Lug
Figure 3-3. Junction Box Ground Wire Connections.
Note
The scale frame must be connected with 10 ga. wire to the ground lug of the transient protection board inside
the junction box.
Scales with more than one junction box require ground straps to be installed between modules. In addition, all junction
boxes need to be connected to the scale frame.
The final ground wire connection must be at the AC power supply ground terminal or ground rod.