YSI IQ SensorNet MIQ/JBR Module - Manual (Page 6)

Overview MIQ/JBR
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1.2 Features of the MIQ/JBR
General characteristics The overall length of the cables in the IQ S ENSOR N ET affects

the operational voltage available for a component
 the quality of the data transmission.
A drop of the operational voltage is compensated for by further
MIQ power supply modules (see system operating manual).
A drop of the quality of the data signals is compensated for by the signal
amplifier module MIQ/JBR (Junction Box Repeater).
If the sum of all cable lengths (including the SACIQ sensor connection
cable) is more than 1000 m, a MIQ/JBR signal amplifier module must
be installed in the system.
To amplify the signal, the MIQ/JBR signal amplifier module divides the
IQ S
ENSOR N ET into two signal ranges (section A, section B).
The MIQ/JBR signal amplifier module has:
 an integrated bi-directional signal amplifier to amplify data signals
during the transition between the signal ranges
 SENSORNET connections for the signal ranges (section A,
section B).
In a IQ S ENSOR N ET system, up to two signal amplifier modules may be
installed. This facilitates the operation of an IQ S ENSOR N ET with up to
3000 m cable length (see section 3.2).
Besides, the MIQ/JBR signal amplifier module can be used for:
 branching the IQ S ENSOR N ET without signal amplification

connecting further IQ S ENSOR N ET components
 setting up an operating site, i.e. the signal amplifier module provides
a possibility for the docking of terminal components.
With the standard MIQ module housing, the MIQ/JBR has the same
characteristics as all MIQ modules regarding stability, leakproofness
and weather resistance. It also provides the same wide variety of
installation options (stacked mounting, canopy mounting, tophat rail
mounting, etc.).