Super Systems 9120 with TS - Manual (Page 5)

SSi 9120 Touchscreen Interface
4586 – 9120 With Touch Screen Interface Page 5 of 80
Section 1 – 9120 Touchscreen Interface
Safety:
• Safety Symbols - Various symbols are used on the instrument. They have the following
meaning:
Caution (refer to the accompanying documents)
• 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 .
•
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.
• 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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