The TA3 and dTA3 telephone connection relay can be used to switch up to two external devices separately with ring tone signals – such as a siren and a flashing light.
The bridging of the calling pause can be set for each of the attached devices. Both the TA3 and the dTA3 are designed for permanent use and are suitable in their weatherproof forms for temperatures between -20 ˚C and + 60 ˚C; in the Ex variation between -20 ˚C and + 40 ˚C.