Klockner Moeller Electric Parts from KlocknerMoeller.net
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Contactors and Relays
Contactor Relays |
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| The System and the Standard |
European Standard EN 50011 “Terminal markings,
reference numbers and reference letters for certain contactor relays”
has a direct bearing on the use and application of the modular system.
There are various types, which the Standard differentiates between by
means of reference numbers and reference letters, depending on the
number and position of the make and break contacts in the device, and
their terminal markings.
Ideally devices with the reference letter E should be used. The basic
devices DILA-40, DILA-31, DILA-22 as well as DILER-40, DILER-31 and
DILER-22 comply with the E version. .
For 6 and 8 pole contactor relays, the “E” version means that four make
contacts must be arranged in the lower/rear contact level. If, for
example, the available auxiliary contact modules are used in the DILA-22
and DILA-3131, they result in contact combinations with reference
letters X and Y.
Below are 3 examples of contactors with 4 normally open and 4 normally
closed contacts with different reference letters. Version E is to be
preferred.
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