ABB NTAC-02 Overspeed Tachometer Module

The typical range for RFID card to XE 020/ANT antenna module is 40 mm for the recommended RI-I02112A-03 RFID card (assuming an aluminium front panel). The card is recognised when the RFID LED on the front of the operating panel turns green (for 3 secs) (refer to chapter “RFID status LED“). There is no provision to detect multiple cards at the same time. If several RFID cards are within range, either only one will be detected or this will cause a detection error, in which case the RFID status LED will turn red.

The immunity of an electrical system 

depends essentially on wiring and shielding that is designed to overcome any EMC problems. Servicing experience has shown that inadequate wiring and shielding is a common cause of system interference and failure. Electromagnetic interference is far more troublesome than "conventional" faults: l It is not normally recognised as such from the symptoms displayed and can often be mistaken for a fault in an assembly, which is basically sound. l They mainly occur sporadically and are difficult to duplicate.

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