2N Lift emergency phone 2N SingleTalk - Manual, 1514 v6.3.0 - Manual (Page 35)

Installation
– universal version
2.5
34
Extending module Installation
The extending module (Part No. 913647E) allows you to record and play your own
voice messages (the lift cabin address, e.g.). Typically, it is integrated in ST as Part
No. 913641 or 913643. But it can also be mounted additionally as described below.
Note
 Before installing an extending module produced earlier, check it for
compatibility with your ST! Modules No.913402E are very similar, but
are equipped with a diagnostic connector on the upper side. They are not
fully software-compatible and, if installed, result in the ST error.
Installation steps
4. Loosen 4 screws and remove the electronics cover.
5. Put the module on the connector in such a way
that you can see the column thread through the
module corner hole.
6. Fit the module with the attached M3 screw.
7. Replace the cover, screwing it into position.
Amplifier Module Installation
Please follow the manual enclosed to amplifier module.