YSI IQ SensorNet MIQ/JBR Module - Manual (Page 10)

Installation MIQ/JBR
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Power supply For power supply purposes, the IQ S ENSOR N ET system is always
regarded as one undivided system. Determine the number of
MIQ power supply modules required for the system following the rules
for the optimum power supply (see system operating manual).
Signal amplification To amplify the signal, the MIQ/JBR divides the IQ S ENSOR N ET into
signal ranges (section A, section B).
Within a signal range, the overall cable length (SNCIQ IQ S
ENSOR N ET
cables + SACIQ sensor connection cables) must not be more than
1000 m. In an IQ S
ENSOR N ET system, up to two signal amplifier
modules may be installed.
When data signals change between the signal ranges (section A,
section B), the signal amplification becomes effective. Signals are not
amplified within a signal range.
Fig. 3-2 Schematic diagram of the MIQ/JBR
Overall cable length
(SNCIQ + SACIQ) Number of
MIQ/JBR modules Number of
signal ranges
< 1000 m 0 1
1000 m - 2000 m 1 2
2000 m - 3000 m 2 3
1 IQ S ENSOR N ET cables at the terminal connections
2 Power flow
3 Data signals
4 Bi-directional signal amplifier
5 Outside contacts on the module enclosure