Rice Lake iQube 920i, Installation Manual

Page: 6 / 54

Installation 3
2.0 Installation
This section describes procedures for connecting load
cell, analog output, power, and serial communications
cables to the
iQUBE junction box. Assembly
drawings and replacement parts lists for the iQUBE
are included for the service technician.
Use a wrist strap to ground yourself and
protect components from electrostatic
discharge (E
S D) when working inside the
iQUBE
enclosure.
2.1 Unpacking and Assembly
Immediately after unpacking, visually inspect the
iQUBE to ensure all components are included and
undamaged. The shipping carton should contain the
iQUBE , this manual, and a parts kit. If any parts were
damaged in shipment, notify Rice Lake Weighing
Systems and the shipper immediately.
See Section 2.16 on page 16 for parts kit contents.
2.2 Mounting the Enclosure
The iQUBE can be mounted either vertically or
horizontally to a flat surface.
2.3 Cable Connections
All models of the iQUBE provide ten cord grips for
cabling into the unit, plus a dedicated cord grip for a
ground wire. Up to eight load cells can be cabled into
the
iQUBE ; other cord grips allow cabling for serial
communications, analog output, digital I/O, and AC
power. Install plugs in all unused cord grips to prevent
moisture from entering the enclosure.
2.4 Load Cells
When wiring load cells, cells wired to iQUBE
connectors J12–J19 (8-channel units) are assigned
default names A1–A8 (8-channel primary unit) or
B1–B8 (8-channel secondary unit). Be aware that
graphic representations of the weighing platform
shown when configuring the scale assume particular
locations for each load cell, based on the
iQUBE
connector used (see Table 2-1). Load cells can be
renamed during configuration.
Figure 2-1 shows two examples of load cell naming
for eight-cell platforms. While load cells can be wired
to any connector on the
iQUBE connector board,
p l at f o r m s d e f i n e d a s u s i n g “ p a i r e d ” s e c t i o n s
(including most truck scale applications) must
correctly associate these pairs to ensure valid
calibration and diagnostic functions.
In the top example of Figure 2-1, the even/odd load
cell wiring scheme requires cells A1/A2, A3/A4, A5/
A6, and A7/A8 to be associated as section pairs. In the
lower example, the sequential wiring requires pair
associations for A1/A8, A2/A7, A3/A6, and A4/A5.
Pair association is set in the platform configuration for
the scale.
Figure 2-1. Load Cell Pairing for Eight-Cell Platforms
Channels 1–4
Channels 5–8
(8-channel units only)
iQUBE
Connector Cell Name
iQUBE
Connector Cell Name
J12 A1 J16 A5
J13 A2 J17 A6
J14 A3 J18 A7
J15 A4 J19 A8
NOTE: For secondary
iQUBE
units, the A prefix is replaced
with B, C, or D.
Table 2-1.
iQUBE
Connector and Load Cell Names
A1
A2
A 3
A4 A8
A7
A6
A5
A1 A2 A 3 A4
A8 A7 A6 A5