Renz letterbox bell push-button conversion Behnke Type20 A/B

Conversion for an old Renz mailbox or similar...

as the original from Renz costs approx. 50-80€ each, i.e. 100-150€ for the 2 push-buttons...

and there was an old crappy Siedle installed in the letterbox.

Was converted to a used Behnke Type20 A/B

(Super processing and sound quality, used price from 70€, and with a Linksys PAP2T Voip adapter approx. 30€,

and a used KNX / EIB flush-mounted push-button actuator interface 15€,

a great combination that is future-proof and expandable and works free of APPs and data theft)

the button frame is the old original Renz (bell button disassembled) then it doesn't matter whether it's silver, white or brown like mine

Printed without support or similar, with just an old PETG rest in almost white

4 spax or similar can be screwed into the flags for tensioning

(I made the flags warm afterwards with a small gas burner and bent them so that they fit (quick and dirty))

n LED strip 12V warm white has been glued to the back wall and is currently running at 8v

otherwise it is really too bright.

the hole on the back was sealed with adhesive tape

(against insects and other animals such as donkeys, ducks and elephants, just everything that climbs into illuminated bell housings).

the bell push is the original from Behnke.

the labeling is a DIN A3 outdoor matt sticker from

www.wir-machen-druck.de (mega satisfied with the store)

I think well under 20€ with shipping.

the stickers were roughly cut out and then stuck on warm with a hairdryer

(the corners were covered warmly)

Assembly: Light button element from behind and old button frame from the front until it snaps into place and then apply clamping screws (after tight comes off!)

"Renz 07-112 ersatz" is the matching nameplate on the mailbox

(with a matching sticker rest of the sheet)

Assembly: Insert, as something broke off the holder,

Warm up and bend over :-D holds super (qad).

The push-button lighting is now controlled via KNX using the flush-mounted push-button actuator interface

switched on / off by the central twilight switch and outputs the Behnke

contacts 1 & 2 to the KNX bus for further processing.

Future-proof, without cloud, cost-effective, durable and proven technology

For less than €150 together, you can convert an old Renz letterbox into a

new era and a new level. (Dry mail included)