Pro Intercom HS2 Series User manual
HS2 Family
Flush-mount and Desktop
Headset Stations
1. Plug a headset into the XLR type 4-pin jack (socket) on the front of the unit. The headset wiring standard is shown in
Fig.1. In Pro Intercom systems, the phase of the earphone is the reverse of that sometimes used. This was done to
reduce the effect that the headset connector and wiring has on the headset station bridging impedance and ‘Sidetone’
(See #8) adjustment stability. Either standard of headset wiring will work with Pro Intercom headset stations.
2. Plug the standard microphone cable from your power supply or master station into the XLR-type 3-pin jack on the back
of the unit or terminal connections.
3. Press the mic. button and partly turn up the volume control on your unit and others on the same circuit as yourself.
4. You should now be able to communicate with any other outstations.
5. The volume control regulates the loudness of your headset earphone(s). It has NO effect on how loudly others hear
you.
6. The microphone amplifier gain is factory adjusted to suit most types of headset microphones. It contains a limiter/com-
pressor which compensates for differences in microphone output and voice levels. Should your chosen headset have too
little mic. output, please contact your dealer.
7. The flash (signal) push button flashes a light in all outstations connected to your circuit. It is used to attract attention in
the event that a user has removed his/her headset. The strobe light on the HS2TL is even more noticeable. Strobe light
versions have a switch for disabling the light.
8. The screwdriver preset controls the level of your own voice in your headset. This adjustment is called ‘Sidetone’. This is
set at the factory at a level suitable to the majority of the users. This can be altered for personal preference or adjusted for
deep cancellation allowing the headset to be removed and used to monitor.
Pro Intercom LLC
PO Box 7035 Algonquin Illinois 60102-7035
Phone: +1 (815) 680-5205 Orders and Tech support: (888) 320-5928 Fax: +1 (815) 526-8689
Printed in U.S.A. Rev.3_01.14
Operating Instructions
These instructions cover the following versions of the HS2 headset stations:
HS2: A single-circuit version mounting in a 2-gang electrical box, and an HS2M multi-circuit version
HS2T: An HS2 mounted in a table-top or surface mounting enclosure, and an HS2MT multi-circuit version.
HS2TL: An HS2 in a table-top cabinet with a rectangular strobe lamp mounted on the face.
Connections to the flush mount versions are made via a terminal strip on the edge of the circuit board. A mating plug is
provided with the unit.
Tabletop versions, mounted in enclosures, are provided with XLR-type connectors on the back panel The single-circuit
models have male and female 3-pin jacks and the multi-circuit versions have Neutrik male and female 6-pin jacks. Dif
ferent manufacturers' 6-pin XLRs may not mate properly.
9. Pro Intercom communications systems are compatible with Clear-Com®and other 200W unbalanced
party-line headset systems
Specifications:
Headset Microphone Impedance: Dynamic -200Wpreferred, 30Wto 1KWacceptable. Electret - 1.2kWto 1.8kW
Headset Earphone Impedance: 150-600Wpreferred, 8W- 4KWacceptable.
Voltage: 24VDC nominal, 15-30VDC acceptable.
Current consumption: 10 mAwith speech, 30 mAwith signal lamp activated, 60mAwith xenon.
Lamp type: 20 mAincandescent. 56mAxenon on /L models
Line bridging impedance: 200Wunbalanced
Sidetone cancellation: 0dBto 55dB
Controls: Talk: Push on/push off, self indicating switch
Listen level: rotary potentiometer
Signal: Non-latching push button switch.
Sidetone: Screwdriver adjust, recessed potentiometer.
HS-2 Multi-circuit Connections
12
3
XLR 3-pin Male
Shield Ô
Ô
+24VDC
Communications
Ô
Headset & Station Connections
Mic Ø ®
Mic + ®
¬Ear +
¬Ear Ø
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