Sonix Hmi-5 Technical Manual
17
SONIX HMI-5 TECHNICAL MANUAL
TM373 / A June 2022 www.eaton.com
5.6.5.1 Emergency speech chime
The Hmi-5 can be configured to play one of three
different chimes before each emergency speech
broadcast, the chimes are different to the routine
speech chimes. Selection of a chime creates a delay
between activating PTT and routing voice to the PA/GA
system while the chime plays.
Available chimes on the Hmi-5 are:
Chime Name
Sound
Notes
Chime 1
1 kHz tone for 1second
Long beep
Chime 2
1 kHz tone 400ms ON
400ms OFF 400ms ON
Double beep
Chime 3
1 kHz tone 100ms ON
100ms OFF repeated 5
times
Multiple fast beeps
None
No chime
No chime is generated and
voice is routed to the system
without delay
Table 4 - Available Emergency Speech Chimes
Chime can be disabled for emergency speech
broadcasts.
5.6.6 PTT Release Delay
The Hmi-5 has a configuration option called PTT Release
Delay, commonly called a ‘Slug Time’. This setting
makes the access panel internally keep the PTT button
active for between 1 and 3 seconds after release. This
will allow a user to correct for a digit slipping off the
button unintentionally.
ote:
N
Installations using both A & B side of the Hmi-5 should ensure
both sides have identical audio configuration to prevent audio artefacts
breaking onto the PA/GA system.
This feature can also be disabled by setting the PTT
Release Delay to None.
5.6.7 Mute Output
The Hmi-5 access panel has no direct outputs for
controlling speaker Mutes and speaker Attenuates,
these outputs are instead generated by the Sonix PA/GA
system rack via the Hmi Tu.
The Mute output activates when the Hmi-5 is the active
PTT broadcast on the PA/GA system. This approach
allows the user to hear any overriding broadcasts if they
are not the one active on the system.
5.6.7.1 Attenuate output
Additionally, the Hmi-5 can control a second output
intended to activate a local speaker attenuate. The
attenuate feature is provided to allow operators to
reduce the volume of an alarm in the local area. The
attenuate output, identical to the Mute output, activates
on active PTT broadcast but can additionally be
controlled manually by the user.
ote:
N
The Local Attenuate button has an alternative function when dis-
abled and is used to control BGM playback, but the outputs will activate
for short periods of time in this mode. See section 6.4.12 on BGM.
5.7 Fault Reporting
5.7.1 Unit Monitoring
The Hmi-5 access panel has built in status monitoring
to detect any issues early. The following features are
monitored:
•
Microphone input is monitored for open (high
impedance) and short (low impedance)
•
Internal Audio pathways – These are monitored using
DTMF signalling while unit is idle
•
Incoming Data communications from PA/GA system
are monitored for presence and quality
•
PTT is monitored for stuck switch – See section
5.6.4.2
•
Inter-FPGA health – The independent halves of the
Hmi-5 communicate with each other, loss of this
communication is considered a fault
Some of these monitoring circuits can be disabled in
configuration, see section 7.
5.7.1.1 Fault reporting
The Sonix PA/GA system has a robust fault reporting
system; all issues with individual units are reported
to the 2Mx central controller using the datagram
messages. Communication links and missing units are
also monitored by the 2Mx central controller. The 2Mx
central controller then forwards the datagrams on to the
software and sends a generic fault flag back to all the
connected units.
