User Manual PS 285 / Issue 1 © 2004 ASL Intercom, Utrecht, The Netherlands.
3
1.0 GENERAL DESCRIPTION
The PS 285 is designed for use as an auxiliary 2-channel
power supply unit, should the main power supply of an
ASL intercom system be insufficient to drive the required
number of stations.
The unit has to be placed in a network in such a way that
it feeds its own group of user stations.
The PS 285 can be used in portable as well as fixed
applications. It uses only 1U of 19” rack space.
The unit is very versatile and ideal for use in applications
where standard microphone cable is available and ease of
set-up is of paramount importance.
The intercom line power supply is fully protected and is
capable of safely driving 20 beltpacks or 10 speaker
stations, or a combination of the two, operating at full
power.
Fully electronic switching increases reliability and allows
for remote Mic Mute facility.
2.0 UNPACKING
The shipping carton contains the parts listed below
* The PS 285
* Mains power cable
* Spare fuses
* User manual
If any are missing, contact your dealer.
With the PS 285 will be a small packet of spare fuses.
Please keep them in a safe place.
There is also one spare fuse included in the mains inlet.
ASL has taken great care to ensure that this product
reaches you in flawless condition.
After unpacking the unit please inspect for any physical
damage to the unit, and retain the shipping carton and
relevant packing materials for use should the unit need
returning.
If any damage has occurred, please notify your dealer
immediately so that a written claim can be initiated.
Please also refer to the guarantee section of this manual.
3.0 MECHANICAL INSTALLATION
A vertical rack space of 1U (1.75”, 44mm) is required for
the PS 285. It is not necessary to provide rear support by
extra bracing or shelving.
Adequate ventilation must be provided by allowing
sufficient space around the sides and rear of the unit to
ensure free circulation of air. Forced cooling is not
required.
The power supply regulator is mounted on the rear of the
unit, and after a period of time it will feel hot to the touch.
This is quite normal, and should be no cause for alarm.