User manual ASL INTERCOM PS 260

[. . . ] If any damage has occurred, please notify your dealer so that a written claim can be initiated. Please also refer to the guarantee section of this manual. 3. 0 MECHANICAL INSTALLATION The PS 260 will interface between ASL partyline (3-wire intercom) and external 4-wire systems. To connect the PS 260 with ASL partyline system, use professional flexible microphone cable with 2 wires and 1 shield only. Connect the partyline system cable into the intercom line connector on the rear. [. . . ] It is transformer balanced and capable of driving a 600 ohms load. signal 10 INTERCOM IN connector This XLR-3 connector is for connecting the intercom line. audio wire 11 INTERCOM LINK connector This output is for extending the intercom line to other user stations. It is linked to the intercom line input connector and has the same pin assignments. 9 6. 0 SUM OUTPUT(S) Connection A function : Output of interface 1, monitors intercom lines 1 + 2 action : Connect the left tag of interface 1 with the right tag of interface 2. Connection B function : Output of interface 2, monitors intercom lines 1 + 2. action : connect the left tag of interface 2 with the right tag of interface 1. Connection A + B function : Outputs of interface 1 and 2 monitor intercom lines 1 + 2 action : cross connect the tags. The PS 260 offers you the possibility of monitoring both intercomlines with one interface. When one interface monitors two intercom lines, both audio signals of the intercomlines will appear on the audio output connector Changing procedure : a. Unscrew the upper cover plate and slide it backwards. Place the unit in front of you, facing the front panel. Depending on which kind of monitoring you need, the following procedures should be followed (next column) d. Screw the cover plate back in place. User Manual PS 260 / Issue 1 © 1994 ASL Intercom, Utrecht, Holland. 5 7. 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. Audio and Call signals are on XLR pin 3, DC power is on XLR pin 2. 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. These rules are: ¼ Use high quality (multipair) cable. 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. Multipair cable should also have an overall 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. [. . . ] output current output impedance OUTPUT AMPLIFIER output impedance maximum load max. output level frequency response SIDETONE rejection DIMENSIONS AND WEIGHT width height depth weight ASL's PRO Series offers a complete two way ('full duplex') communications system. Users of the system are connected via a 'party line'. Master stations (with built-in power supply), beltpacks, speaker stations and power supplies are interconnected via standard microphone cable. [. . . ]