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User Manual BS 287 / May  2013 © ASL Intercom BV  

 

 

 

 

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.  Heed all warnings on the apparatus and in 

the safety and operating instructions and 
follow all installation and use instructions. 

 

4.  Follow all installation, operating and use 

instructions. 

 

5.  Unplug the apparatus from the AC power 

outlet before cleaning. Use only a damp 
cloth for cleaning the exterior of the 
apparatus. 

 

6.  Do not use accessories or attachments 

not recommended by the manufacturer, as 
they may cause hazards and void the 
warranty. 

 

7.  Do not operate this apparatus in high 

humidity areas or expose it to water or 
moisture. 

 

8.  Do not place the apparatus on an unstable 

cart, stand, tripod, bracket or table. The 
apparatus may fall, causing serious 
personal injury and damage to the 
apparatus. 

 

9.  Do not block or cover any openings in the 

apparatus. These are provided for 
ventilation and protection from 
overheating. Never place the apparatus 
near any heat sources such as radiators, 
heat registers, stoves, or other apparatus 
(including amplifiers) that produce heat. 
Do not place the apparatus in an 
enclosure such as a cabinet without 
proper ventilation.  

 

10. Operate the apparatus using only the type 

of power source indicated on the marking 
label. Unplug the apparatus’ power cord 
by gripping the power plug, not the cord. 

 

 
 
 

11. Insert the plug properly. Do not defeat the 

safety purpose of the polarized or 
grounding-type plug. An American 
polarized AC line plug has two blades with 
one wider than the other. This plug will fit 
only one way into the power outlet. This is 
a safety feature. If you are unable to insert 
the plug fully into the outlet, try reversing 
the plug. If the plug still fails to fit, contact 
an electrician to replace the obsolete 
outlet. A grounding type plug has two 
blades and a third grounding prong. The 
wide blade or the third prong are provided 
for your safety. If the provided plug does 
not fit into your outlet, consult an 
electrician to replace the obsolete outlet. 

 

12. Route power supply cords so that they are 

not likely to be walked on or pinched by 
items placed upon or against them. Pay 
particular attention to cords at plugs, 
convenience receptacles, and the point 
where they exit from the apparatus. 

 

13. Do not overload wall outlets or extension 

cords, as this can result in a risk of fire or 
electrical shock. 

 

14. Unplug this apparatus during lightning 

storms or when unused for long periods of 
time. 

 

15. Never insert objects of any kind into the 

apparatus through openings, as the 
objects may touch Dangerous voltage 
points or short out parts. This could cause 
fire or electrical shock. 

 

16. Refer all servicing to qualified service 

personnel. Servicing is required when the 
apparatus has been damaged in any way, 
such as when the power-supply cord or 
plug is damaged, liquid has been spilled or 
objects have fallen into the apparatus, the 
apparatus has been exposed to rain or 
moisture, does not operate normally, or 
has been dropped. 

 
 
 
 

Summary of Contents for BS 287

Page 1: ...ER SUPPLY USER MANUAL May 2013 This products is designed and manufactured by ASL Intercom B V Zonnebaan 42 3542 EG Utrecht The Netherlands Tel 31 0 30 2411901 Fax 31 0 30 2667373 Email info asl inter com Web www asl inter com ...

Page 2: ... DESCRIPTION 4 3 0 MECHANICAL INSTALLATION 4 4 0 MAINS POWER SAFETY EARTH 4 5 0 FRONT PANEL CONTROLS CONNECTOR 4 6 0 REAR PANEL CONTROLS CONNECTORS 5 7 0 TECHNICAL SPECIFICATIONS 5 8 0 PARTY LINE TECHNICAL CONCEPT 6 9 0 CABLING 6 10 0 EARTHING CONCEPT 7 11 0 BS 287 BLOCK DIAGRAM 7 12 0 POSSIBLE SYSTEM CONFIGURATION 8 ...

Page 3: ...he apparatus power cord by gripping the power plug not the cord 11 Insert the plug properly Do not defeat the safety purpose of the polarized or grounding type plug An American polarized AC line plug has two blades with one wider than the other This plug will fit only one way into the power outlet This is a safety feature If you are unable to insert the plug fully into the outlet try reversing the...

Page 4: ...ides 100 240 V AC 50 60 Hz and at least 60 watts The outlet should have a clean earth Avoid using mains power outlets which also power dimmer controlled lighting equipment The wires in the mains lead are color coded green yellow Earth safety ground blue Neutral brown Live In case the wires in the mains lead do not correspond with the colored markings identifying the terminals in your mains plug pr...

Page 5: ...ion in the power section Before replacing a fuse the mains cord must be disconnected from the mains outlet 7 MAINS Inlet IEC Mains connector 7 0 TECHNICAL SPECIFICATIONS System Dynamic range 80 dB 1kHz THD 1 Frequency response 200 Hz 15 kHz 3 dB Call signal send 2 8 mA Call signal threshold receive 2 4 V DC Operating voltage 24 32 V DC Intercom line Impedance 350 Ω 1 kHz 2 2 kΩ DC Audio level nom ...

Page 6: ...cable with solid cores especially when the cable is subjected to bending during operation or installation Cable screens to XLR pin 1 The screen of each separate microphone cable and or the screen of each single pair in a multi pair cable should be connected to pin 1 of each XLR 3 connector Do not connect these screens to the metal housing of ASL units or XLR 3 wall boxes Connect metal cable trunks...

Page 7: ...PAGE 7 User Manual BS 287 May 2013 ASL Intercom BV 10 0 EARTHING CONCEPT 11 0 BS 287 BLOCK DIAGRAM ...

Page 8: ...PAGE 8 User Manual BS 287 May 2013 ASL Intercom BV 12 0 POSSIBLE SYSTEM CONFIGURATION ...

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