Indicator; Cable Connections - Rice Lake IQ plus 210 Installation Manual

IQ plus 210 Installation Manual
2.3

Indicator

The indicator enclosure must be opened to connect cables for load cells, communications and digital inputs.
The IQ plus 210 has no on/off switch. Before opening the unit, ensure the power cord is disconnected from the
WARNING
power outlet.
CAUTION
Use a wrist strap to ground yourself and protect components from electrostatic discharge (ESD) when working inside the
indicator enclosure.
This unit uses double pole/neutral fusing which could create an electric shock hazard. Procedures requiring work inside the
indicator must be performed by qualified service personnel only.
The supply cord serves as the power disconnect for the IQ plus 210. The power outlet supplying the indicator must be installed
near the unit and be easily accessible.
Ensure power to the indicator is disconnected, then remove the screws that hold the backplate to the enclosure body, then lift
the backplate away from the enclosure and set it aside.
2.3.1

Cable Connections

The IQ plus 210 provides three cord grips for cabling into the indicator: two for the power cord and load cell cabling, the third for
communications and digital input cables. The free cord grip comes with a plug installed to prevent moisture from entering the
enclosure. If your application requires serial communication or digital input cabling, remove the plug and install cables as
described in Sections Section 2.3.4
Cable Grounding
Except for the power cord, all cables routed through the cord grips should be grounded against the indicator enclosure. Do the
following to ground shielded cables:
• Use the lock washers, clamps, and kep nuts provided in the parts kit to install grounding clamps on the studs adjacent to
the cord grips. Install grounding clamps only for cord grips that will be used; do not tighten nuts.
• Route cables through cord grips and grounding clamps to determine cable lengths required to reach cable connectors.
Mark cables to remove insulation and shield as described below:
• For cables with foil shielding, strip insulation and foil from the cable 0.5" (15 mm) past the grounding clamp (see
Figure 2-1). Fold the foil shield back on the cable where the cable passes through the clamp. Ensure silver (conductive)
side of foil is turned outward for contact with the grounding clamp.
• For cables with braided shielding, strip cable insulation and braided shield from a point just past the grounding clamp.
Strip another 0.5" (15 mm) of insulation only to expose the braid where the cable passes through the clamp (see
Figure 2-1).
• For load cell cables, strip the yellow shield wire 0.75" past the grounding clamp. Fold wire back and secure between the
cable and clamp. Shield wire function is provided by contact between the cable shield and the grounding clamp.
• Route stripped cables through cord grips and clamps. Ensure shields contact grounding clamps as shown in
Tighten grounding clamp nuts.
• Finish installation using cable mounts and ties to secure cables inside of indicator enclosure.
Figure 2-1. Grounding Clamp Attachment for Foil-Shielded and Braided Cables
4
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and Section 2.3.5 on page
Cord grip
Insulated cable
Grounding clamp
Foil (silver side out)
Cut insulation here
Shield wire (cut)
for foil-shielded cables
Length of foil before folding
back on cable insulation
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6.
NOTE: Install lockwashers
first, against enclosure,
under grounding clamp
Cut insulation here
for braided cables
Braid
Figure 2-1.