Number Item Description
25 Supervision (20 kHz) switch – When set to ON, an inaudible 20 kHz pilot tone is added to the
audio signal and the power amplifier supervision is enabled. When
the power amplifier fails and the pilot tone cannot be detected
anymore, the Fault LED will illuminate and, if available, the spare
amplifier will take over. The pilot tone detection threshold on the
100 V terminal is 10 V +3 dB/-1 dB.
– When the Supervision switch is set to OFF, no pilot tone is present
and no supervision or spare amplifier switching takes place. Power
consumption and heat production is lowest when Supervision is
OFF.
26 Priority switches Two switches are used to set the Priority. See Priority switches, page
23.
27 Chime switches Two switches are used to set the chime tone. See Chime switches, page
23. Only the chime for Microphone 1, PLE-1CS or PLE-1SCS, on
terminal (42) is changed.
28 Chime level Adjusts chime output level. Only the chime level for Microphone 1,
PLE-1CS or PLE-1SCS, on terminal (42) is changed.
31 Input 6 Line/Phantom/
Microphone selector
Switch to select the sensitivity and phantom power of Input 6. The
Phantom mode is valid for microphone sensitivity only (Phantom: 18 V
@ no load).
33 Input 5 Line/Phantom/
Microphone selector
Switch to select the sensitivity and phantom power of Input 5. The
Phantom mode is valid for microphone sensitivity only (Phantom: 18 V
@ no load).
36 Phantom power ON/OFF
switch for Inputs 3 and 4
independently
Switch to set the phantom power to ON (Phantom: 18 V @ no load).
39 Phantom power ON/OFF
switch for Inputs 1 and 2
independently
Switch to set the phantom power to ON (Phantom: 18 V @ no load).
40 Press To Talk (PTT) switch – PTT switch set to ON: A microphone connected to terminal (41)
will be disabled, but an all-call Call Station PLE-1CS or PLE-1SCS,
connected to terminal (42), allows speech to all zones and an
optional chime signal.
– PTT switch set to OFF: Microphone input 1 is enabled. A connected
PLE-1CS or PLE-1SCS is not disabled but just mixed with
Microphone input 1, without a chime signal.
43 MOH level adjustment Adjusts the output level of the “Music On Hold” signal on outputs (44)
and (45).
22 en | Configuration Plena All-in-One System
2014.09 | V1.2 | Installation and Operating Manual Bosch Security Systems B.V.
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