PS 289 DUAL CHANNEL POWER SUPPLY USER MANUAL Issue 2011 © ASL Intercom BV DESIGNED AND MANUFACTURED BY: ASL INTERCOM B.V. ZONNEBAAN 42 3542 EG UTRECHT THE NETHERLANDS PHONE: +31 (0)30 2411901 FAX: + 31 (0)30 2667373 E-MAIL: info@asl-inter.com WEB: www.asl-inter.
CONTENT OF THIS USER MANUAL 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0 13.0 14.0 SAFETY INSTRUCTIONS .......................................................................3 UNPACKING............................................................................................3 WARRANTY ............................................................................................3 MECHANICAL INSTALLATION ..............................................................4 MAINS POWER .......................
1.0 SAFETY INSTRUCTIONS 1) Read all safety and operating instructions before you operate the apparatus. 2) Retain all safety and operating instructions for future reference. 3) Read all warnings on the apparatus and in the safety and operating instructions. 4) Follow all instructions for installation, operating and use. 5) Unplug the apparatus from the AC power outlet before cleaning. Use only a damp cloth for cleaning the exterior of the apparatus.
.0 MECHANICAL INSTALLATION A vertical rack space of 1U (1.75” / 44,5 mm) is required for the PS 289. It is not necessary to provide rear support by extra bracing or shelving. unit to ensure free circulation of air. Forced cooling is not required. Adequate ventilation must be provided by allowing sufficient space around the sides and rear of the The power supply module is mounted on the bottom of the PS 289. After a period of time it will feel hot to the touch on top and bottom.
7.0 FRONT PANEL CONTROLS AND CONNECTOR 1 POWER ON/OFF switch Mains power push button for switching the PS 289 on and off 2 OVERLOAD LED This red LED illuminates when the circuit breaker shuts off line power due to overload. A cause for overload can be too many user stations connected or a short circuit in the interconnecting cables. The circuit breaker resets automatically 3 seconds after the cause of the overload has been removed and restores the line power.
9.0 REAR PANEL CONTROLS AND CONNECTORS 10 DC INPUT connectors In case 100/240 V AC power is not available, the PS 289 can be powered by a DC supply (12 – 28 V), to be connected to the unit via these connectors 11 SYSTEM LINK IN connectors Inputs for the cable of an external party-line Intercom system. If one or both channels of the PS 289 are to be connected to another intercom system then these connectors accept the communication signals from the other system. See also #4 and #5.
11.0 PARTY LINE, TECHNICAL CONCEPT User stations in an ASL intercom system are connected via one or several 'party lines'. A party line offers two way („full duplex‟) communication and consists of standard microphone (multi-pair) cable. One wire is used as an audio line, one as a power line and the screen of the cable functions as earth/return. Current drive is used for signal transfer.
13.0 EARTHING CONCEPT 14.
