System Configuration - Siemens SIWAREX JB Instruction Manual

Revision 03.06

1.3 System Configuration

The SIWAREX JB junction box is used in technical weighing systems for parallel
connection of up to four wire strain gage load cells. If more than four load cells
are to be connected to a weigh module, several junction boxes can be connected
to each other by cross connections. Load cells can be connected in 4 and 6-wire
technology.
The technical data of the weigh module and load cells used must be observed
with the maximum number of load cells. The total resistance of the parallel
switched load cells must be in the range of the permissible load resistance of
the weigh module.
The junction box is connected with the weigh module with a signal cable.
A shielded cable with six wires must be used as the signal connection.
We recommend the SIWAREX cable Li2Y2x0,75St+2x(2x0,34St)-CY:
•
7MH4 702-8AG, orange coated, for standard applications or
•
7MH4 702-8AF, blue coating, for Ex-applications.
The maximum cable length between load cells and weigh module can be found
in the technical data of the weigh module. Intermediate elements such as
Ex disconnectors must be taken into account.
SIWAREX JB junction box in aluminum housing – Instruction Manual
A5E00400544B
Technical Description
6