36 — Installation & Programming Guide
STATUTORY REQUIREMENTS
If you have any doubts concerning the suitability, connection or use of this apparatus then
consult a suitably qualified person before continuing.
You must ensure that the power supply in the Alarm Control unit will not become
overloaded by the combined power requirements of any of the installed card options.
In order to maintain approval of the Digital Alarm Communicator, it is essential that the
other optional cards do not use or generate mains voltages or any other hazardous
voltage. A hazardous voltage is one which exceeds 42.4V peak a.c. or 60 V d.c. Consult a
competent telecommunication engineer before proceeding if you have any doubt.
For a host using or generating voltages greater than 300 V (rms or d.c.), consult a
competent telecommunications engineer before installation of the alarm system.
These problems will not be encountered if the Alarm Control Panel's instructions are
adhered to.
All apparatus connected either directly or indirectly to a public telecommunication system
requires an approval. However certain attachments are eligible for approval under
General Approval NS/1234/100003. Further details of this General Approval and the
conditions pertaining to it are given in OFTEL update SA29, available from:-
The Librarian
OFTEL
Export House
50 Ludgate Hill
London
EC4M 7JJ
You are reminded that the communicator should only be used when mounted inside the
host alarm control panel in such a way as to be inaccessible without the use of tools.
This means that you must refit ALL case screws and secure the pcb in the host using the
fixing provided.
SUITABILITY FOR USE
The approval of this apparatus for connection to British Telecom Public Switched
Telephone Network is invalidated if the apparatus is subject to any modification in any
material way not authorised by BABT, or it’s use with or connection to
i) Internal control software which has not been formally accepted by BABT.
ii) External control software or external control apparatus which causes the communicator
to contravene the requirements of BS6789 : section 3.2.
All apparatus connected to the communicator and thereby connected directly or indirectly
to the Public Switched Telephone Network must be approved apparatus as defined in
section 22(10) of the British Telecommunications act.
