Eurotherm 3116 PID Podręcznik Użytkownika Pobierz pdf (Strona 13)

ENG

3116 User Guide Part No. HA028005ENG Issue 2.0 May 04

Overcurrent protection

The power supply to the system should be fused appropriately to protect the cabling to the units.

Voltage rating

The maximum continuous voltage applied between any of the following terminals must not exceed 264Vac:

! relay output to logic, dc or sensor connections;

! any connection to ground.

The controller must not be wired to a three phase supply with an unearthed star connection. Under fault conditions such a

supply could rise above 264Vac with respect to ground and the product would not be safe.

Conductive pollution

Electrically conductive pollution must be excluded from the cabinet in which the controller is mounted. For example, carbon dust

is a form of electrically conductive pollution. To secure a suitable atmosphere in conditions of conductive pollution, fit an air filter

to the air intake of the cabinet. Where condensation is likely, for example at low temperatures, include a thermostatically

controlled heater in the cabinet.

Over-temperature protection

Where damage or injury is possible, we recommend fitting a separate over-temperature protection unit, with an independent

temperature sensor, which will isolate the heating circuit.

Please note that the alarm relays within the controller will not give protection under all failure conditions.

Installation requirements for EMC

To ensure compliance with the European EMC directive certain installation precautions are necessary as follows:

For general guidance refer to Eurotherm Controls EMC Installation Guide, HA025464.

When using relay 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 we recommend Schaffner FN321 or FN612.

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Eurotherm 3116 PID Podręcznik Użytkownika Strona 13