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Toa SX-2000 Series Installation User Manual

Page 135

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135

SX-2100AO

SP

Shield

AMP

PA LINK

20 kHz

Pilot Tone

40 Hz

Pilot Tone

Ground fault

detection

Short/open

circuit detection

End-of-line unit

[general description of the EOL method]

Shielded types of cables are used for all speaker lines, and all the shield wires are grounded.

An End-of-line (Eol) unit is connected at the furthest end of speaker line.

this Eol unit produces an impedance of specified value between the speaker line and the shield wire by using

a pilot tone signal output from the SX-2100Ao.

observing this impedance, the SX-2100Ao judges the speaker line to be disconnected when it cannot detect

the specified value. for overload, refer to "General description of the Impedance method" described on

the

previous page

since the SX-2100Ao judges overload using the same way as the Impedance method.

Notes

• Ground all of the speaker shield wires and the SX-2100AO's chassis.

• Connect only a single EOL unit per speaker line from an amplifier output. (Do not connect 2 or more EOL units

per line.)

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