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Sonix Hmi-Tu Technical Manual
SONIX HMI-TU TECHNICAL MANUAL
TM377 / A June 2022 www.eaton.com
2.2.3.3 Hmi-5 barrier Connection
The Hmi-5
MUST
be operated through an Hmi-Br unit to
ensure correct operation and to also meet the requirements for
safe use in a hazardous area installation. The M4 stud earthing
MUST
be attached to the I.S. Earth installed into the cabinet.
Minimum cable size for the I.S. Earth is 4.0 mm
2
.
The Hmi-Br has no user replacement parts or controls. Its
function is to limit the power available into the hazardous
area. It provides 4 channels for voltage and currenting limited
connections. Each channel is protected by a fuse which is not
replaceable.
Warning:
Repairing or modifying the Hmi-Br will
invalidate its ATEX and IECEx certification.
Warning:
The Hmi-Br and Hmi-5 must be used together
to maintain the ATEX and IECEx certification. The Hmi-
Br has only been certified for use with the Hmi-5.
ote:
N
For further information see Appendix A for details of the I.S.
certification details and conditions for safe use.
1
5
1
5
Hmi-Br
I.S. Earth
Non-Hazardous Area
Hazardous Area
Hmi-Tu
Hmi-5
J1
J2
Certification
Label
Attenuate
Mute
+5V
+5V
-5V
-5V
6
1
J2-5
J6-9
Hmi-5
1
2
2
10
1
9
J6-9
Hmi-26
1
2
2
10
1
9
J1
+48V
0V
D2
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
Figure 8 – Hmi-Br connections
A side PA/
GA
Assignment
Connection
Max
output
voltage
Max
output
current
2off Twisted
pair,
individual
and overall
screen.
0.25 mm² to
2.5 mm² (max
ferruled)
Audio 1 +
J1,2 – 1
26.1 V dc
137.4 mA
Audio 1 -
J1,2 – 2
26.1 V dc
137.4 mA
Data 1 +
J1,2 – 3
7.9 V dc
36.3 mA
Data 1 -
J1,2 – 4
7.9 V dc
36.3 mA
Screen (0V)
J1,2 – 5
Table 10 – Hmi-Br connection details
2.2.3.4 Access panel 0V reference
The interconnecting cable screen provides the 0V return
between the access panels to the Hmi Tu (pin 9/10). The
jumper link LK17 selects the correct refence on the Hmi-Tu for
the access panels to work correctly (see Figure 1).
Amp Bus
HMi Bus
HMi Bus
I/O Bus
COMPLIANT
Sonix 2Mx Unit
2Mx Bottom
Hmi Bottom
Hmi T
op
2Mx T
op
J1
Sonix Hmi Unit #2
L.Spk
CH1
Flt
Mute
Att
L.Spk
CH2
Mute
Flt
2Mx Bottom
Hmi Bottom
Hmi T
op
2Mx T
op
J1
Sonix Hmi Unit #1
L.Spk
CH1
Flt
Mute
Att
L.Spk
CH2
Mute
Flt
Default
Config
Power
Dist
Beacon
Amplifier
HMI
Matrix
I/O
LOCAL STATUS
Default
Config
Power
Dist
Beacon
Amplifier
HMI
Matrix
I/O
LOCAL STATUS
Sonix 2Mx Unit
LK17
10
9
LK17
10
9
Figure 9 – LK17 0 V reference
2.2.4 Local Mute / Local Attenuate unit
Connections to activate a local mute and/or local attenuate
unit are made into the corresponding channel to match the
access panel channel. Both outputs generate 10 V dc [+5 V
and -5 V] and can drive a minimum load impedance of 300Ω.
These outputs are activated by a push to talk event on the
access panel connected to the associated port. The Attenuate
output is also activated on push to talk but additionally can
be manually controlled from a Local Attenuate button on the
same access panel.
ote:
N
Please observe carefully maximum cable weight due to limited
terminal size.
1
5
1
5
Hmi-Br
I.S. Earth
Non-Hazardous Area
Hazardous Area
Hmi-Tu
Hmi-5
J1
J2
Certification
Label
Attenuate
Mute
+5V
+5V
-5V
-5V
6
1
J2-5
J6-9
Hmi-5
1
2
2
10
1
9
J6-9
Hmi-26
1
2
2
10
1
9
J1
+48V
0V
D2
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
Figure 10 – Mute connections
A side PA/GA
Assignment
Connection
2off Twisted pair, individual and
overall screen.
0.25 mm² to 1.5 mm² (max ferruled)
FLT +1
J2,4,3,5 – 1
FLT -2
J2,4,3,5 – 2
Mute +3
J2,4,3,5 – 3
Mute -4
J2,4,3,5 – 4
Att +5
J2,4,3,5 – 5
Att -6
J2,4,3,5 – 6
Table 11 – Mute connection details
ote:
N
The FLT +1 and FLT -2 are not in use, reserved for future
expansion.
2.2.5 Earth Stud
The unit provides an M4 earth stud, connected usually to
telecoms earth. This connection is used as a functional earth
by the unit.
Cable sizing is as follows:
Recommended 4.0 mm
2
Minimum
2.5 mm
2
