Rice Lake IQ plus 710 Installation Manual page 9

Figure 2-1. Mark Length of Cable at Inside of Cord Grip
4. Remove cable from cord grip. Strip insulation
Discontinued Product
from the marked position to the end of the cable.
5. For cables with braided shielding, cut the shield
at the same location as the insulation, then strip
an additional 15 mm of insulation from the cable
to allow the shield to contact the inside of the
metal cord grip (see Figure 2-2).
Figure 2-2. Braided Shield Cabling
For cables with foil-type shielding, strip an
additional 15 mm of insulation from the cable.
Cut the foil shield at a location about 15 mm
inside the enclosure, then fold the foil shield
back on the cable (see Figure 2-3). Ensure silver
(conductive) side of foil is turned outward for
contact with the metal cord grip.
Figure 2-3. Foil Shielded Cabling
6. Cut the shield wire just inside the enclosure (see
Figure 2-3). Shield wire function is provided by
contact with the metal cord grip.
7. Route cables through cord grip so cable shield
contacts cord grip fitting as shown in Figures
2-2 and 2-3. Tighten cord grip.
Mark Position
on Cable
Braid
Foil (silver side out)
Shield wire (cut)
8. Next, remove connector J1 from the board. The
connector plugs into a header on the board (see
Figure 2-4). Wire the load cell cable from the
load cell or junction box to connector J1 as
shown in Table 2-1.
J1 Pin
1 +SIG
2 –SIG
3 +SENSE
4 –SENSE
5 +EXC
6 –EXC
For 6-wire load cell connections,
remove jumpers JP1 and JP2.
Table 2-1. J1 Pin Assignments
9. If using 6-wire load cell cable (with sense
wires), remove jumpers JP1 and JP2 before
reinstalling connector J1. For 4-wire installation,
leave jumpers JP1 and JP2 on.
10.Finish installation using cable mounts and ties to
secure cables inside of indicator enclosure.
When connections are complete, reinstall connector J1
onto the header so that it snaps securely into place.
Use two cable ties to secure the load cell cable to the
inside of the enclosure.
Setting the Load Cell Compensation Jumper
The load cell compensation jumper JP5 (near the
transformer on the CPU board; see Figure 2-4) must be
set ON for load cells with unbalanced bridges. The
compensation jumper has the effect of lowering the
positive excitation voltage. Uncompensated unbalanced
load cells can cause instability or calibration errors.
For RL1040 and RL1042 load cells, set the
compensation jumper as follows:
• RL1040 load cells: jumper OFF
• RL1042 load cells: jumper ON
For other load cell types, use the following procedure
to determine the correct jumper position;
1. Disconnect load cell from indicator and use
an ohmmeter to measure the following:
• +EXC to +SIG, +EXC to –SIG
• –EXC to +SIG, –EXC to –SIG
Measured values between the excitation line
and each of the signal lines should be within
2–3Ω.
2. If the +EXC measurements are Š 5% larger than
the –EXC measurements, set the compensation
jumper in the ON position. If the +EXC
measurements are < 5% greater (or are less) than
the –EXC measurements, set the jumper in the
OFF position.
Function
Installation 5