Rice Lake Tracer AVi - v1.0 - Manual (Page 7)

Installation 3
Load Cell Wiring
To attach the load cell cable to the connector board,
plug the cable into external connector (see Figure 2-6
on page 6).
Wire load cell cables as shown in Table 2-1.
2.5 Serial Communications
The J4, J6 and J7 serial communications ports on the
iQube connector board support communications
between the iQube and a host device (PC and/or
remote display.)
• Port J4 supports full-duplex RS-232
communications between the
iQube unit and a
host device.
Port J6 and J7 are used to connect to the
remote display(s).
To attach serial communications cables, plug cable
into the external DB-9 connectors labeled Remote
Display.
Table 2-2 shows the pin assignments for connectors
J4, J6, and J7.
Communications Cable Distance Limitations
The maximum cable lengths 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
c a n b e u s e d a s a g e n e r a l g u i d e f o r
i Q u b e
communications cabling (10 ft cable is provided):
RS-232: 50 ft (15 m)
2.6 Core Module DIP Switches
The DIP switches on the iQube core module must be
set to configure the iQube as a primary or secondary
unit, and to specify the type of serial communications
provided by the unit. Table 2-3 lists the DIP switches
and their functions.
2.7 Core Module Reset Procedure
If VIRTUi does not recognize the connection to the
load cell, the core module may need to be reset to
initialize the
iQube firmware.
To reload the default firmware into the iQube core
module, do the following:
1. Power-off the iQube . Remotely powered units
can be powered off by temporarily removing
fuse F1 (see Figure 2-1 on page 2).
2. Set core module DIP switch 8 ON.
3. Power-on the iQube .
4. Power-off the iQube .
5. Set DIP switch 8 OFF.
6. Power-on the iQube . The reset is now complete.
DB-9 Pin
Female Connector
On-Board
Connector
(J3) Function
7 1 +SIG
3 2 –SIG
4 3 +EXC
6 4 –EXC
5 5 SHIELD
Table 2-1. Load Cell Connector Pin Assignments
Connector DB-9 Pin Pin Signal
J4
(Host Com)
Male 2 1 TxD
Male 3 2 RxD
Male 5 3 Gnd
J6
(Remote)
Female 1 1 DC+
Female 2 2 GnD
Female 9 3 TxD
J7
(Remote)
Female 1 1 DC+
Female 2 2 GnD
Female 9 3 TxD
Table 2-2. Serial Port Pin Assignments
Switch Function Values
1–3 Primary OFF, OFF, OFF = PRIMARY
4 Setup enable ON = setup enabled
5 Host
communication
protocol OFF = RS-232
6 Host
communication
port OFF = Port J7
7 Reserved OFF
8 Load default OFF
Table 2-3. Core Module DIP Switch Settings