Rice Lake iQUBE User manual

77224
Digital Diagnostic Junction Box
Installation Manual

Technical training seminarsare available through Rice Lake Weighing Systems.
Course descriptionsand datescan be viewed at www.rlws.com or obtained
by calling 715-234-9171 and asking for the training department
© 2005 Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice.
May 2005
Contents
About This Manual ................................................................................................................................... 1
1.0 Introduction.................................................................................................................................. 1
1.1 System Configurations and Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0 Installation ................................................................................................................................... 3
2.1 Unpacking and Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Mounting the Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Cable Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.4 Load Cells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.5 Serial Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6 Primary/Secondary Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.7 Digital I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.8 Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.9 Core Module DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.10 Core Module Reset Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.11 iQUBE Communications Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.11.1 Copper-Wire Connection to the 920i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.11.2 Fiber-Optic and Ethernet Communications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.11.3 Remote Fiber-Optic Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.11.4 Analog Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.12 Installing Tap and Run Connectors for 920i Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.13 Installing the Optional Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.14 Installing Option Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.14.1 Digital-to-Analog (DAC) Conversion Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.14.2 iQUBE Internal Fiber-Optic Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.14.3 iQUBE Internal Ethernet Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.14.4 920i Internal Fiber-Optic Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.15 Fuse Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.16 Parts Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.17 Replacement Parts and Assembly Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.0 920i Indicator Configuration...................................................................................................... 17
3.1 Configuration Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2 920i–iQUBE Menu Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3 iQUBE-Specific Menu Structures and Parameter Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.1 SERIAL Menu, iQUBE Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.2 iQUBE Submenu, IQDIAG Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.3 FEATURE Menu, CONTACT Submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.3.4 PFORMT Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.3.5 Version Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.0 PC Configuration ........................................................................................................................ 27
4.1 Using Revolution III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.1.1 Revolution III Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.1.2 Downloading to the iQUBE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.2 Using iRev . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

ii iQUBE Installation Manual
5.0 Calibration ................................................................................................................................. 29
5.1 920i Front Panel Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.1 Cal-Match Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.1.2 Traditional Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.1.3 Theoretical Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5.2 Revolution III Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6.0 Diagnostics ................................................................................................................................ 32
6.1 iQUBE Diagnostic LEDs and Diagnostic Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2 Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3 Diagnostic Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.3.1 Configuring the 920i Diagnostics Softkey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.3.2 920i Diagnostic Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
6.4 Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
7.0 Alerts.......................................................................................................................................... 35
7.1 Network Alert Notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
7.2 Alert Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
8.0 920i Serial Commands .............................................................................................................. 37
9.0 Appendix .................................................................................................................................... 40
9.1 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
9.2 Printed Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
9.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
iQUBE Limited Warranty......................................................................................................................... 44

Introduction 1
About This Manual
This manual is intended for use by service technicians
responsible for installing and servicing 920i™digital
diagnostic junction boxes. This manual applies to
Version 2.0 or later of the 920i indicator software.
Configuration and calibration of the iQUBE can be
accomplished using the Revolution III configuration
utility.
For installations using the 920i indicator, the indicator
can be configured using the Revolution III or iRev™
configuration utilities, serial commands, or the 920i
indicator front panel keys.
Some procedures described in this manual
require work inside the iQUBE or indicator
enclosure. These procedures are to be
performed by qualified service personnel
only.
Authorized distributors and their employees
can view or download this manual from the
Rice Lake Weighing Systems distributor
site at www.rlws.com.
1.0 Introduction
The iQUBE is a digital programmable junction box
used to connect up to 16 full bridge analog load cells.
The iQUBE outputs a serial stream that can be directly
input to the 920i indicator using copper, fiber-optic, or
Ethernet cabling. Alternatively, the iQUBE can be
configured to provide an analog output signal for
input to standard digital weight indicators.
The iQUBE is available in three models:
• Four-channel
• Eight-channel
• Eight-channel with eight digital I/O channels
The basic iQUBE consists of two boards:
•Theconnector board provides the physical
connections for the load cells, serial
communications, analog output, and digital
I/O.
•Thecore module, which plugs into the
connector board, contains the iQUBE’s
processor and stores configuration and
calibration data for the iQUBE. The core
module provides a discrete A/D for each
channel input and converts the analog load
cell signal to a digital serial output.
Up to four iQUBE units can connect and communicate
as a multidrop RS-485 network, consisting of one
primary and up to three secondary iQUBE units. The
maximum number of load cells supported for the 920i
indicator is 16. Up to four individual weighing
platforms can be configured for a scale system.
The iQUBE can be configured and calibrated through
the 920i indicator (Version 2.0 or later), the 920i’s
iRev configuration utility, or by using the iQUBE
module of the Revolution III configuration utility.
iQUBE Options
Options for the iQUBE include the following;
Internal power supply: The 6 VDC power supply
mounts inside the iQUBE enclosure and requires a
115/230 VAC input. This option is required for
applications that do not use the 920i indicator and for
920i applications that use more than two iQUBE units.
Analog output: This option consists of a DAC card
that mounts on the core module and converts the
iQUBE’s digital output stream to 0–30 mV or 4–20
mA.
Fiber-optic transceiver: This option mounts on the
connector board to convert the iQUBE’s serial output
into visible light for fiber-optic interface. When used
with the optional power supply, the fiber-optic
interface provides electrical isolation of the iQUBE
from the host.
Remote fiber-optic interface: This option converts
digital fiber-optic data received from the iQUBE to an
analog signal that can be input to the load cell input of
a standard weight indicator.
Ethernet: This option mounts on the connector board
to transfer the iQUBE’s serial output onto the Ethernet.
Configuration
There are two methods for configuration, using either
the 920i indicator as the host (menu or iRev
configuration) or by using the Revolution III utility to
configure the iQUBE directly. Each method defines
the load cells connected to iQUBE, which load cells
comprise a platform, and which platforms make up
the scale system.

2iQUBE Installation Manual
Configuration consists of the following steps:
Define Load Cells: This is the electrical sensitivity
(mV/V output) and capacity specification of the load
cells. Load cell names and serial number can also be
specified.
Define Platforms: Any iQUBE board can assign load
cells to two separate platforms. A maximum of four
platforms can be defined in an iQUBE system. The
relationship between load cells is also defined as a
paired or circular arrangement.
Define Systems: The platforms can be assigned to a
system. Up to four unique systems can be defined,
however the 920i will only support one system per
serial channel.
Load Cell Trimming and Calibration
Cal-Match™calibration calculates the load cell trim
based on a comparison of the signal generated by an
applied weight for each load cell to the signal
generated by all other load cells. If a known test
weight value is used, this calibration also sets the span
for the scale.
Three types of Cal-Match calibration can be
performed using the iQUBE. Each type of calibration
captures the initial dead load of the scale and provides
a means to trim the outputs of the load cells.
Theoretical calibration allows each cell to be zeroed
and trim factors calculated. Based on the cell capacity
and sensitivity, the iQUBE calculates weight values
based on the total signal from all of the cells.
Section calibration requires a weight to be placed
over each section. Trimming can be performed by
running a weight cart down the middle of the
platform, stopping for calibration of each section.
Corner calibration requires weight to be placed over
each cell individually. Corner trimming can be
performed for platforms using an even or odd number
of cells.
Diagnostics
Diagnostic functionality can be enabled for the iQUBE
to identify abnormal load cell outputs. This is based
on the reference established through cell associations.
The diagnostic conditions that can be identified for
paired configurations are open bridge or channel, zero
reference tolerance, drifting, peak-to-peak noise, and
out-of-balance conditions. Diagnostic conditions
recognized for circular configurations are limited to
open bridge or channel, drifting, and peak-to-peak
noise.
Error conditions generate a displayed error message if
connected to the 920i which, with an Ethernet card,
can be configured to e-mail the alert message to an
address. In addition, there is a visual LED indication
on the connector board to identify any load cell that
appears to have an abnormal condition.
Cell Emulation
Cell emulation allows the output of a failed load cell
to be emulated. Automatic or manual cell emulation
can be specified (limited to one cell per scale system),
using either truck scale (Type 1) or tank/hopper/floor
scale (Type 2) emulation algorithms.
NOTE: Satisfactory results from cell emulation require the
load to be centered and the scale installation to be plumb and
level.
1.1 System Configurations and Options
Table 1-1 lists iQUBE model and option part numbers.
920i part numbers listed are for models without A/D
cards.
Model / Option PN
4-channel iQUBE 77778
8-channel iQUBE 77148
8-channel iQUBE with digital I/O 77728
iQUBE internal power supply, 6 VDC 77531
iQUBE internal Ethernet interface 77142
iQUBE internal fiber-optic interface 77143
920i internal fiber-optic interface 77788
920i internal Ethernet communications card 71986
920i Serial expansion card 67604
Remote (external) fiber-optic interface 77789
Analog output, 0–30 mV 77146
Analog output, 4–20 mA 77797
920i universal model, 115 VAC 77790
920i universal model, 230 VAC 77791
920i panel mount model, 115 VAC 77792
920i panel mount model, 230 VAC 77793
920i wall mount model, 115 VAC 77794
920i wall mount model, 230 VAC 77795
Table 1-1. iQUBE Model and Option Part Numbers

Installation 3
2.0 Installation
This section describes procedures for connecting load
cell, digital I/O, 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 (ESD) 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
indicator, 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 13 for parts kit contents.
2.2 Mounting the Enclosure
The iQUBE is designed to fit into the junction box
cavity of most truck scales. For other installations, it
can be mounted either upright or on its side using the
mounting feet supplied in the parts kit. Mounting tabs
are provided in the parts kit for installations that
require them.
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,
platforms defined as using “paired” sections
(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
A3
A4 A8
A7
A6
A5
A1 A2 A3A4
A8 A7 A6 A5

4iQUBE Installation Manual
Figure 2-2. iQUBE Connector Board (8-channel with Digital I/O) with Core Module and DAC Card
Load Cell Wiring
To attach load cell cables to the connector board, route
the cables through the cord grips on the load cell
connector end of the iQUBE enclosure. Note the load
cell numbering assigned to the connectors (see
Figure 2-2).
Strip 1/4-inch of insulation from the ends of the load
cell wires. Use the cable clamp tool included in the
parts kit to open the connector springs and install
wires into the connectors. Wire load cell cables as
shown in Table 2-2.
When connections are complete, use cable ties and
mounts to secure the load cell cables to the inside of
the enclosure.
+SIG
–SIG
+EXC
–EXC
SHLD
1
J12
LOAD CELL 1
J13
LOAD CELL 2
+SIG
–SIG
+EXC
–EXC
SHLD
1
J14
LOAD CELL 3
+SIG
–SIG
+EXC
–EXC
SHLD
1
J15
LOAD CELL 4
+SIG
–SIG
+EXC
–EXC
SHLD
1
J16
LOAD CELL 5
+SIG
–SIG
+EXC
–EXC
SHLD
1
J17
LOAD CELL 6
+SIG
–SIG
+EXC
–EXC
SHLD
1
J18
LOAD CELL 7
+SIG
–SIG
+EXC
–EXC
SHLD
1
J19
LOAD CELL 8
+SIG
–SIG
+EXC
–EXC
SHLD
1
J21 1
IO 8 IO 7 IO 6 IO 5 IO 4 IO 3 IO 2 IO 1
J8
ANALOG2
+SIG
+SIG
1
1
–SIG
–SIG
SHLD
SHLD
J9
ANALOG 1
+SIG
1
–SIG
SHLD
J10
BOARD POWER
+PWR
1
GND SHLD
J11
SECONDARY
POWER
1
J4
GND SHLD
ZB Y
A
J7
GNDSHLD
Z/TXD A/RXD
+PWR
GND
J20
1
1
1
F1
OFF ON
SW1
SETUP
1
J3
LED EXTENSION
J6
1
EXPANSION MODULE
GREEN =
POWER ON
DIGITAL I/O
8-CHANNEL
MODELS ONLY
DIGITAL I/O
MODEL ONLY
INPUT/OUTPUT LEDs:
OUTPUT: GREEN = RELAY ON
INPUT: GREEN = SWITCH CLOSED
+PWR
GND SHLD
12345678
ON
J4
DAC
DIP SWITCH / S1
1
J2
1
J1
CORE MODULE
J3
D1
C5 C6 C7 C8
C1 C2 C3C4
CELL STATUSLEDs
FIBER-OPTIC OR
ETHERNET
OPTION
YB
Load Cell Connector
Pins (J12–J19) Function
1+SIG
2–SIG
3+EXC
4–EXC
5SHIELD
Table 2-2. Load Cell Connector Pin Assignments

Installation 5
2.5 Serial Communications
The J4 and J7 serial communications ports on the
iQUBE connector board support communications
between the iQUBE and a host device (indicator or
PC) or other iQUBE units.
• Port J7 supports full-duplex RS-232 or
four-wire RS-485 communications between
the primary iQUBE unit and a host device.
The communications protocol (RS-232 or
RS-485) and port used to communicate with
the host device are selected by setting DIP
switches on the core module (see Section 2.9
on page 7).
NOTE: Four-wire RS-485 communications with
the 920i requires installation of the serial
expansion card in the indicator. See Table 2-4.
Port J7 is also used by secondary iQUBE units
to connect to the next downstream secondary
unit.
• Port J4 supports full-duplex RS-485
communication between the primary iQUBE
unit and any secondary iQUBE, and between
successive secondary units (see Section 2.6).
To attach serial communications cables, route the
cable through the cord grip and wire to the connector.
Once cables are attached, plug the connector into the
header on the board. Use cable ties to secure serial
cables to the inside of the enclosure.
Table 2-3 shows the pin assignments for connectors J4
and J7. See Section 2.6 for information about wiring
for secondary units.
RS-485 Connections to Host 920i
Table 2-4 shows the connections needed for RS-485
communications between a host 920i and the iQUBE.
The 920i serial expansion card, PN 67604, must be
installed in the indicator for 4-wire RS-485
communications with the iQUBE.
Communications Cable Distance Limitations
The maximum cable lengths for that can be used for
various communications types depend on a number of
factors. These include: output impedance of the
transmitter; electrical noise in the environment; cable
capacitance, gauge, termination, and shielding.
Given that these and other factors will affect the
maximum usable cable length, the following distances
can be used as a general guide for iQUBE
communications cabling:
RS-232: 75 ft (23 m)
RS-485: 2000 ft (610 m)
Fiber-optic: 500 ft (150 m)
2.6 Primary/Secondary Configuration
Up to three iQUBE junction boxes can be configured
as secondary units controlled by a primary iQUBE
unit. Figure 2-3 on page 6 shows the
primary-to-secondary wiring for multiple iQUBE
units. Successive secondary units are wired in parallel
(A to A, B to B, and so on) as shown in Figure 2-3.
NOTES:
•120Ωtermination resistors (included in parts
kit) must be installed across the A and B
terminals on the J4 connector of the primary
unit and between the A and B terminals on the
J7 connector of the last secondary unit (see
Figure 2-3 on page 6).
• All six wires, including shield and ground
wires, must be connected between the
communicating iQUBE units.
Connector Pin Signal
J7 1SHIELD
2GND
3Z / RS-232 TxD
4 Y
5 B
6A / RS-232 RxD
J4 1A (RS-485 +RxD)
2B (RS-485 –RxD)
3Y (RS-485 +TxD)
4Z (RS-485 –TxD)
5GND
6SHIELD
Table 2-3. Serial Port Pin Assignments
920i Serial Expansion Board
J2 Connector
iQUBE
J7 Connector
RS-485 Signal Pin Pin RS-485 Signal
+RxD 1 4 +TxD
–RxD 2 3 –TxD
–TxD 3 5 –RxD
+TxD 4 6 +RxD
Table 2-4. RS-485 Connections for 920i Host

6iQUBE Installation Manual
DIP switches on the core module of each iQUBE must
be set to indicate whether the unit is a primary or
secondary, the communication protocol and port used,
and the secondary address.
• For the primary unit, DIP switches 1–3 must
all be set OFF. Set switches 5 and 6 based on
the protocol (RS-232 or RS-485) and port (J7
or J6) used to communicate with the host
device.
• For secondary units, DIP switch 5 must be set
ON; use switches 1–3 to set the secondary
address as shown in Table 2-5.See Section 2.9 on page 7 for more information about
the core module DIP switches.
Figure 2-3. Primary-to-Secondary Communications Wiring
DIP
Switch Primary Unit Secondary Unit
1–3 OFF, OFF, OFF ON, OFF, OFF = SECONDARY1
OFF, ON, OFF = SECONDARY2
ON, ON, OFF = SECONDARY3
5RS-232 = OFF
RS-485 = ON
ON
6OFF = J7
ON = J6
—
Table 2-5. Core Module Communications DIP Switches
J4
GND SHLD
ZB Y
A
J7
GNDSHLD YBZ/TXD A/RXD
1
1
PRIMARY
iQUBE UNIT
J4
GND SHLD
ZB Y
A
J7
GNDSHLD YBZ/TXD A/RXD
1
1
SECONDARY1
iQUBE UNIT
TO HOST
INDICATOR OR PC
J4
GND SHLD
ZB Y
A
J7
GNDSHLD YBZ/TXD A/RXD
1
1
SECONDARYn
iQUBE UNIT
SHLD GND Z Y B A
120Ω
120Ω
NOTE!
ALL SIX WIRES, INCLUDING SHIELD
AND GROUND WIRES, MUST BE
CONNECTED FOR COMMUNICATION
BETWEEN iQUBE UNITS