SU-114N version 1.3
R&D Department
7
Amplifier, speakers line
and critical path surveillance unit
SU-114N
*
The
open collector
output contacts
of
the unit are as per
the diagram
attached.
3. REAR VIEW
(1) Ethernet B connector
RJ-45 connector. It is used, in a redundant
network, as a secondary connection to the
Ethernet network. In installations with a
redundant network, if the connection to ETH A
fails, the unit automatically switches to this B
connection, so that the PA system continues to
operate.
(2) 10 Mb indicator of the Ethernet B input
Indicates the speed of the Ethernet network
connected to the Ethernet B input. If the LED is
lit, it indicates a speed of 10 Mb. If it is not lit, it
indicates a network speed of 100 Mb.
(3) ACT indicator of the Ethernet B input
When lit, it indicates that data is being sent or
received through the Ethernet B input.
(4) LINK indicator of the Ethernet B input
When lit, it indicates the connection of the
Ethernet B input with the HUB or SWITCH.
(5) Ethernet A connector
RJ-45 connector. Used for connection to the
Ethernet network.
(6) 10 Mb, ACT and LINK LED indicators of
the Ethernet A input
These serve the same purpose as the Ethernet B
indicators, applied in this case to the Ethernet A
input.
(7) CTRL OUT strip
Open collector output contact*. It is activated
when surveillance detects amplifier, loudspeaker
line or critical path errors.
(8) Power supply input
Used to power the SU-114N. Connect a power
supply of 24 VDC / 1.5 A to this input.
(9) Ground to chassis connection.
(10) Supply fuse
2 A fuse inside the unit. To gain access to it, it is
necessary to remove the cover of the SU-114.
(11) Measure activation
Input contact, which allows an external device to
activate measurement at audible frequencies (4
kHz or 400 Hz). It is activated when the contact
is connected to ground.
(12) Measure indication
Open collector output contact*. This is activated
when the SU-114N is engaged in measurement.
It is used:
In installations with attenuators, in order to
activate the security paging of the attenuators
when
loudspeaker
line
surveillance
is
performed.
In installations without attenuators and with
music programs, in order to attenuate the
high frequencies of the music when
loudspeaker line surveillance is performed,
through a contact of a UMX-ECT card
configured for this purpose.
In installations without attenuators and with
music programs, without UMX-ECT cards or
without a UMX-02/0 matrix, in order to stop
the music when loudspeaker line surveillance
is performed. For this purpose the Measure
Indication is normally used connected to an
external relay, whose function is to cut off the
music program during the measurement
process.
Figure 2
