2
iQUBE
® Junction Box/920i
Quick-Start Guide
This document will guide you through a typical iQUBE
truck scale is being used with two iQUBE
NOTE: Load cells or simulators must be connected before following the instructions listed in this document. RS-422 and
RS-485 are used interchangeably. TEDS is not supported.
Configuration using 920i
Establish a Connection
1. Connect the iQUBE
NOTE: RS-422 is recommended over RS-232 due to the 115,200 baud rate of the iQUBE
of 10 feet and RS-422 has a maximum distance of 1000 feet at this high baud rate.
2. The table below shows connections needed for RS-422 communications between a host 920i and the iQUBE
Two-wire half duplex is available on Port 4 of the 920i.
3. Ensure S2 dip switches on the iQUBE
location.
NOTE: If a change is made to switch position, cycle power on the iQUBE
position is only read on power-up. Once power has been re-applied, place the SW1 in the OFF position.
July 16, 2024
2
to 920i installation with the recommended settings. It assumes an 8-cell
2
CPU boards.
2
and the 920i using an RS-422 connection.
920i Board
J10 Connector (Port 4)
RS-422 Signal
GND
RS-422 A
RS-422 B
Table 1. 2-Wire RS-422 Connections for 920i Host
2
CPU board are set to 485 (1,2 both set to OFF). See
4 3 2 1
1
J12
S1
M/S PORT
1
J6
POWER SUPPLY
CONNECTOR
SW1
CONFIG SWITCH
+ S I G
– S I G
J1
+ E X C
– E X C
+ T D
– T D
+ S I G
– S I G
J2
+ E X C
– E X C
+ T D
– T D
Figure 1. iQUBE
2
iQUBE
J7 Connector
Pin
Pin
RS-422 Signal
1
1
GND1
5
4
RS-485 A
6
5
RS-485 B
2
while SW1 is switched to CFG, as the switch
6 5 4 3 2 1
1
1
J7
J5
SERIAL PORT 1
DIGITAL I/O
R T S
D T R
J14
485
232
R x D
S2
T x D
G N D 1
HDPLX
FDPLX
G N D
T M S
J8
T D I
T D O
T C K
G N D
+ 3 . 3
J10
– T D
+ T D
J3
– E X C
+ E X C
– S I G
+ S I G
– T D
+ T D
J4
– E X C
+ E X C
J9
HB1
– S I G
+ S I G
2
CPU Board
2
, RS-232 has a maximum distance
2
Figure 1
for S2 dip switch
PN 119611 Rev B
.
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