IDL 101
INSTALLATION
HB_IDL101_E_V222.doc
19
Gantner Instruments Test & Measurement GmbH
Due to their low current consumption (max. 100 mA at 12 VDC) the modules can also be remote-fed via longer lines.
Several modules can be supplied parallel within the permissible voltage range and considering the voltage drop in the
lines. The supply lines can also be installed in one cable, together with the bus line, if required.
In order not to charge the distribution voltage of the modules unnecessarily and to avoid unnecessary line troubles, a
separate power supply is recommended for sensors with a large current requirement.
3.7. Grounding
The shell of the
Datalogger IDL 101
has to be connected to earth. For this purpose an M3-thread for attaching an
grounding cable is located on the back side of the shell.
Back View
Earthing Connection
Figure 3.3 Grounding Connection at the ISM
3.8. Lightning Protection
If the supply, signal and data lines are installed between several buildings, appropriate protections against lightning
must be made, e.g. by:
laying the cables in metal tubes which are earthed on both sides
laying the cables in concrete cable ducts with fed-through arm
using a lightning-protected-wire
The lines must be wired with protection elements against excess voltage at the point where they are lead-in into a
building, e.g. with varistors or excess voltage conductors filled with rare gas.
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