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
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.)
