PS 289 DUAL CHANNEL POWER SUPPLY USER MANUAL October 2013 This product is 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 SAFETY INSTRUCTIONS ........................................................... 3 GENERAL DESCRIPTION PS 289 ............................................. 4 MECHANICAL INSTALLATION ................................................... 4 MAINS POWER ........................................................................... 4 FRONT PANEL CONTROLS AND CONNECTOR ...................... 5 REAR PANEL CONTROLS AND CONNECTORS ............
1.0 SAFETY INSTRUCTIONS Please always follow these instructions to help ensure against injury to yourself and/or damage to the system 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.
2.0 GENERAL DESCRIPTION PS 289 The PS 289 is designed to be a dual channel power supply in an ASL intercom system. To connect this unit to intercom user stations via the party line, professional microphone cable (2 wires + 1 shield) has to be used. The intercom line power supply is fully protected and can safely drive at least 20 Pro Series beltpacks or 10 remote 2-channel speaker stations, operating at full power.
.0 FRONT PANEL CONTROLS AND CONNECTOR 1 POWER ON/OFF switch To switch mains power on or 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 line power. During short circuit, the LED flashes every 3 seconds.
14 AUX INPUT connector (XLR-3) This Aux input is electronically balanced and accepts line level audio signals. Pin assignment: Pin 1: 0V / ground, Pin 2: signal (+) Pin 3: signal (-) 15 FUSE holder A fuse protects the PS 279 against severe internal damage in case of malfunction in the power section. Before replacing the fuse the mains cord must be removed. Make sure that the correct fuse (T 1250) is placed in the holder 16 MAINS INLET IEC Mains connector. 7.
9.0 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.
11.0 EARTHING CONCEPT 12.
