User manual ASL INTERCOM PS 285

[. . . ] 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. 2. 0 UNPACKING 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. 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. [. . . ] The booster should be placed in the middle of the chain of user stations. Refer to page 10 for an example of a 2-channel intercom network with a booster. 4 User Manual PS 285 / Issue 1 © 2004 ASL Intercom, Utrecht, The Netherlands. 6. 0 FRONT PANEL CONTROLS over load PS 285 Power Supply Booster Pro series On Standby On Standby Power CHANNEL A CHANNEL B Intercom 1 2 3 4 1 POWER ON/OFF switch Mains power push button for switching ON and OFF the internal power supply. OVERLOAD LED This LED illuminates if the internal power supply has shut off line power due to overload. If the internal power supply is overloaded (too many user stations are connected or short-cicuit in the interconnecting cables), it activates a circuit-breaker which immediately shuts off line power. This circuitbreaker resets automatically 3 seconds after the overload situition is terminated, restoring line power automatically. During short-circuit, the overload LED extinguishes very shortly every 3 seconds. This overload LED also comes on every time you switch on the main power. 3 ON LED This LED illuminates if a partyline is connected to the intercom input and the unit supplies power to the output. STANDBY LED This LED illuminates when no line power is detected at the input connector and no power is supplied to the output connector. 2 4 User Manual PS 285 / Issue 1 © 2004 ASL Intercom, Utrecht, The Netherlands. 5 7. 0 Type REAR PANEL CONTROLS & CONNECTORS Serial Number B PUSH B A PUSH A WARNING : THIS UNIT MUST BE EARTHED. HIGH VOLTAGE INSIDE DISCONNECT MAINS INPUT BEFORE REMOVING COVER. AC Input voltage : ! 90 - 240 V 50 - 60 Hz USE 250V FUSES ONLY Fuse : Intercom HOLLAND Intercom Line Intercom Line T 1250 mA 5 6 7 8 5 OUTPUT connector This XLR-3 supplies power to the user stations connected to the PS 285 when line power is supplied to the input connector. audio wire 7 FUSE This fuse protects the PS 285 against severe internal damage, in case of malfunction in the power section. It is most important to place the correct fuse in the holder: mains voltage fuse 90 ­ 240 VAC T 1250 mA Spare fuses will be found in the small packet supplied with the unit. 6 INPUT connector This XLR-3 is the sense input and should be connected to the intercom line from the main power supply. Pin assignments are like the output connector. 8 MAINS inlet IEC Mains connector. For correct wiring and operation refer to section 4. 0. WARNING Before you plug in the mains voltage, check if: * The fuse is correct 6 User Manual PS 285 / Issue 1 © 2004 ASL Intercom, Utrecht, The Netherlands. 8. 0 CABLING For the PRO Series Intercom system the interconnecting cables are of the shielded two-conductor microphone cable type and the intercom line connectors are of the XLR-3 type. XLR pin 1 is connected to the shield of the cable which functions as the common return for audio and power. Since the audio signal is transferred in an unbalanced way, certain rules have to be obeyed when installing the cables of an intercom network. This is to avoid earth loops and to minimize power loss and the possible effect of electromagnetic fields. For interconnecting user stations, power supplies and accessories in an ASL Intercom network, use high quality shielded two-conductor (minimum 2x 0. 30 mm2) microphone cable only. In case of a multi channel intercom network, use high quality microphone 'multipair' cable only, each pair consisting of two conductors (minimum 2x 0. 15 mm2) with separate shield. Use flexible single and multipair microphone cable instead of cable with solid cores, especially when the cable is subjected to bending during operation or installation. The screen of each separate microphone cable and/or the screen of each single pair in a multipair cable, should be connected to pin 1 of each XLR-3 connector. [. . . ] The ASL power supply may be connected to the mains power outlet to which other audio equipment is connected. Avoid using mains outlets which also power dimmer controlled lighting systems. In case of more complex installations, don't hesitate to contact us. Please send us a block diagram of the planned network with a list of all user stations and their positions, and we are happy to advise you on cabling lay-out. · · · · · · · · User Manual PS 285 / Issue 1 © 2004 ASL Intercom, Utrecht, The Netherlands. 7 9. 0 PARTY LINE, TECHNICAL CONCEPT 11. 0 TECHNICAL SPECIFICATIONS PS 285 POWER SUPPLY mains voltage range DC ouput voltage ripple and noise max. [. . . ]