User's Manual

AS4020 STs
29
AC Power Supply Unit Type 6
The Type 6 is a socket PSU the plugs directly into the AC supply socket. It is supplied with a
range of adapters to ensure compatibility with the socket design in the country of deployment
AC Power Supply Unit Type 7
The type 7 ST PSU cad be used to provide power to all SIUs and has a 7AH battery back-up
to maintain the functionality of the ST in the event of a mains supply failure. The PSU may be
free standing or wall mounted.