Installation

Installation Installation

lindsaymfg.com
from lindsaymfg.com More from this publisher
26.12.2012 Views

4 AND 5 WIRE DOOR STATION OPERATION There will be instances where not all of the six wires normally required for operation will be available. 5-Wire Operation If only five wires are available from the Door Station, the “TC” line may be omitted. Where the “TC” line has been omitted, a diode must be added across the “TC” and “VLC” terminals at the Master or Room Station to which the cable from the front Door Station is connected. Placement of Diode For 5-Wire Operation MASTER STATION SHLD VLC TC NEG POS DIODE MUS1 COM2 COM1 AUX MUS2 ROOM STATION AUX MUS2 MUS1 COM2 COM1 SHLD VLC TC NEG POS NOTE: CATHODE (STRIPED END) OF DIODE CONNECTS TO “TC” DIODE 29

4-Wire Operation If only four wires are available from the Door Station, the “COM2” line may be omitted in addition to the “TC” line. Where the “COM2” line has been omitted, there will be a reduction in microphone and speaker volume, which can be compensated for, by turning up the microphone and speaker gain at the Door Station. NOTE: Omitting the “COM2” line may reduce immunity to RF interference. Fitting capacitors at the Door Station and at the Room Station, to which the cable from the front Door Station is connected, will compensate for this to some extent. Placement of Capacitors For 4 Wire Operation COM1 COM2 102 CAPACITORS # COM1 COM2 # 1 nF MONOLITHIC OR CERAMIC (102 MARKING) 102 30

4 AND 5 WIRE DOOR STATION OPERATION<br />

There will be instances where not all of the six wires normally required for operation will be<br />

available.<br />

5-Wire Operation<br />

If only five wires are available from the Door Station, the “TC” line may be omitted.<br />

Where the “TC” line has been omitted, a diode must be added across the “TC” and “VLC”<br />

terminals at the Master or Room Station to which the cable from the front Door Station is<br />

connected.<br />

Placement of Diode For 5-Wire Operation<br />

MASTER<br />

STATION<br />

SHLD<br />

VLC<br />

TC<br />

NEG<br />

POS<br />

DIODE<br />

MUS1<br />

COM2<br />

COM1<br />

AUX<br />

MUS2<br />

ROOM<br />

STATION<br />

AUX<br />

MUS2<br />

MUS1<br />

COM2<br />

COM1<br />

SHLD<br />

VLC<br />

TC<br />

NEG<br />

POS<br />

NOTE: CATHODE (STRIPED END) OF DIODE CONNECTS TO “TC”<br />

DIODE<br />

29

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