User manual ASL INTERCOM BS 216

[. . . ] The intercom line power supply is fully protected and can drive at least 10 beltpacks operating at full power. The power supply is completely separated from all other functions and in case of power failure the unit can accept line power from an external ASL power supply. 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 occured, please notify your dealer immediately so that a written claim can be initiated. [. . . ] POWER LED This LED illuminates if line power is supplied by the internal power supply. 5 SIDETONE trimmers These trimmers adjust the level of your own voice as you hear it in your headset. Adjustment procedure : - set the trimmer in start position: fully clockwise. Adjusting the sidetone does not affect the level of your voice as it is heard by other stations. 2 3A BUZZER VOLUME trimmer This trimmer adjusts the volume of the buzzer. It is activated by pressing a CALL button of the BS 216 or a CALL button of any other station on channel A or B for longer than two seconds. 6 4 VOLUME A & B control knobs These knobs adjusts the listen level for the headset. Each channel can be adjusted separately. TALK A & B buttons These buttons allow you to talk to each channel separately or simultaneously. A momentary push will send a CALL signal to all stations connected to that intercom channel and the CALL LEDS will start flashing. Press and hold the buttons for 2 seconds will activate the call buzzer. After the CALL button is released the LEDS will continue to flash for a further 2 seconds. AUX VOLUME controls These knobs adjust the level of the Aux input signal to each of the two intercom lines. HEADSET connector A XLR-4 type connector for the connection of the local headset. phones - (GND) 7 8 9 User Manual BS 216 / Issue 1 © 1998 ASL Intercom, Utrecht, Holland. 3 6. 0 REAR PANEL CONTROLS & CONNECTORS 10 A & B line connectors These XLR-3 type connectors are for connecting the remote-stations, via standard microphone cable. There are two connectors for channel A and two connectors for channel B. audio wire 11 AUX INPUT connector This XLR-3 type aux input is electronically balanced and accepts audio levels between -16dBu to +22dBu on line leve, and -38dBu to +2dBu on mic level. Signal When mic level is selected, a +30V DC phantom power is supplied to pins 2 and 3. 12 FUSE This fuse protects the BS 216 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 100 - 240 VAC T 1250 mA 13 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 Spare fuses will be found in the small packet supplied with the unit. 7. 0 INTERNAL CONTROLS MIC GAIN The mic gain can be adjusted internally by a trimmer located on the pcb near to the headset connections. 4 User Manual BS 216 / Issue 1 © 1998 ASL Intercom, Utrecht, Holland. 8. 0 CABLING For the BASIC 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 in order to avoid earth loops and to minimize power loss and the possible effect of electromagnetical fields. These rules are: ¼ Use high quality (multipair) cable. [. . . ] All cable routes should have a 'star' configuration, with the central earthing point (usually close to the power supply position) as the centre of the star. - due to the high bridging impedance offered by each station, the number of stations 'on line' has no influence on the level of the communications signal. It develops a DC potential over the line impedance which will be sensed by each station and interpreted as a Call signal. 100 - 240 V 50/ 60Hz AC +30 V +/-5% DC < 11 mV rms 1. 8 A continuous /2. 31 A peak 200 ohms 40 dB - 70 dB (adjustable internally) +6 dB at 5 kHz 200 Hz - 13 kHz (-3 dB) + 9 V DC HEADPHONES DRIVER AMP max. input level Phantom power 200 ohms 8 V rms (200 ohms) 0. 16 W rms (each can) 0 - 30 dB adjustable 100 dBA 30 Kohms (balanced line level) 4. 6 Kohms (balanced mic level) -18 dBu to +6dBu (line level) -38 dBu to -14 dBu (mic level) +22 dBu (line level) +2 dBu (mic level) +30V DC (mic level selected) 10. 0 GUARANTEE This unit is warranted by ASL Intercom to the original enduser purchaser against defects in workmanship and materials in it's manufacture for a period of one year from date of shipment to the end-user. [. . . ]