The pulse relay series 26 are equipped with coils, which fulfil the safety requirements of the IMQ standard
While using illuminating push buttons (1.5 mA 230 VAC) only one of them is permissible, while using up to a max. of 10 of them, a capacitor C=1.5 μF/250 VAC is to be used
The capacitor has to be mounted parallel to relay coil