Super Systems 9120 RPSC - Manual (Page 3)

Model 9120 Redundant Probe System - Color
4580 – Redundant Probe System – Color Page 3 of 23
Safety
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Safety Symbols - Various symbols are used on the instrument. They have the following meaning:
Caution (refer to the accompanying documents)
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Grounding of the temperature sensor shield - In some installations, it is common practice to replace the
temperature sensor while the controller is still powered up. Under these conditions, as additional
protection against electric shock, it is recommended that the shield of the temperature sensor be
grounded.
Do not rely on grounding through the framework of the machine .
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Installation requirements for EMC - To ensure compliance with the European EMC directive, certain
installation precautions are necessary. When using relay or triac outputs, it may be necessary to fit a
filter suitable for suppressing the emissions. The filter requirements will depend on the type of load. For
typical applications, it is recommended to use Schaffner FN321 or FN612.
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Routing of wires - The wiring for the low voltage DC, and particularly the sensor, input should be
routed away from high-current power cables. This will minimize the pick-up of electrical noise. When it
is impractical to do this, use shielded cables with the shield grounded at one end.
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