Viessmann 5548 Keypad, answerable, 3-way for Solenoid Signal/Accessory

Description

Viessmann 5548 Keypad, answerable, 3-way for Solenoid Signal/Accessory
Product information "Keypad 3-concept"
With momentary contact for two 3-way shape signals.
Especially suitable for the Hobby-light-entrance-signals Art. 4021, 4022, the signal control module Art. 5210 and the control module for light-entry signals Art. 5222. In analog use the control panel also controls the control modules for light signals Art. 5224 and 5229, if 3-way signals are connected to it.
Together with the rectifier diodes Art. 6834 also usable for three way switches!
Several desks can be strung together.
Contact rating: 2 A.
Instructions:
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https://viessmann-modell.com/media/pdf/fd/60/83/5548.pdf