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Pub.: 42004-383D
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model DHS/DHF Series
Digital Intercom St ations
T ABLE OF C ONTENTS
Confidentiality Notice.....................................................................................................................1
General Information.......................................................................................................................1
Product Overview...................................................................................................................................1
System Requirements and Limitations.................................................................................................1
Features and Functions..........................................................................................................................2
Available Models.....................................................................................................................................3
Wall-Mount Handset Intercoms (Indoor/Outdoor) ...............................................................................................3
Wall-Mount Hands-free Intercoms (Indoor/Outdoor)...........................................................................................3
Flush-Mount Hands-free Intercoms......................................................................................................................3
Description of Major Components........................................................................................................4
Installation ......................................................................................................................................5
General Information............................................................................................................................... 5
Station Placement .................................................................................................................................................5
Mounting..................................................................................................................................................6
Models DHS-101, DHF-101, and DHF-102.........................................................................................................6
Models DHF-103 and DHF-104 ........................................................................................................................... 7
Conduit Installation................................................................................................................................8
Metallic Conduit Installation Details ....................................................................................................................8
Field Wire Installation............................................................................................................................9
Power ....................................................................................................................................................................9
System.................................................................................................................................................................11
Audio ..................................................................................................................................................................11
Audio Level Adjustments ...................................................................................................................................12
Switch Configuration..........................................................................................................................................15
Inputs ..................................................................................................................................................................16
Outputs................................................................................................................................................................16
Operation.......................................................................................................................................18
Hands-free Operation...........................................................................................................................18
Handset Operation................................................................................................................................ 18
Headset Operation................................................................................................................................19
Paging..................................................................................................................................................... 19
Alarms and Music.................................................................................................................................19
Status Indication...................................................................................................................................20
Call Status........................................................................................................................................................... 20
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
V
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
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Table of Contents Pub.: 42004-383D
MODEL DHS/DHF SERIES DIGITAL INTERCOM STATIONS
Controls..................................................................................................................................................20
Keypad................................................................................................................................................................20
Single Button Dialing .........................................................................................................................................20
Talk/Listen Control.............................................................................................................................................20
Call Cancel..........................................................................................................................................................20
Master Volume ...................................................................................................................................................20
Maintenance..................................................................................................................................21
General Information............................................................................................................................. 21
Troubleshooting....................................................................................................................................21
Service ................................................................................................................................................................22
Replacement Parts................................................................................................................................22
Specifications ................................................................................................................................23
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
V
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
ii
Page 3
Pub. 42004-383D
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model DHS/DHF Series
Digital Intercom St ations
Confidential ity Notice
This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAITronics retains all intellectual property and other rights in or to the information contained herein, and
such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.
General Information
Product Overview
The GAI-Tronics DHS/DHF Series Digital Intercom
Stations are designed for use in hazardous and nonhazardous area communications, both indoors and
outdoors, and in high noise areas.
The DHS/DHF Series Intercom Stations are ideal for
both large and small intercom systems. Communication
and security systems can be networked to include up to
120 intercom servers with the capability to support a
corresponding maximum of 5,760 stations. The
systems can be upgraded to include alarms, radio
interface, telephone interface, music, etc. All
communication to the stations is via a two-wire digital
communication line.
These intercom stations provide all-call, group call,
hands-free, handset and headset communication,
input/output controls, and a variety of other functions.
These stations also contain integrated functions such as
door and gate control, and video integration, and control
desk functions, etc.
Figure 1. Digital Intercom Station
System Requirements and Limitations
As a minimum, the DHS/DHF Series Stations require a central cabinet to supply power for operation with
its basic functions. A local 24 V ac or dc power source is required for full functionality (external speaker,
audio line driver and headset operation). Remote amplifiers can be installed with these stations to
broadcast additional audio.
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
V
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
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Features and Functions
• Central power (limited functionality) or
local power operation (full functionality)
• Two-wire digital communication
• Direct dial, auto-dial, group call, and all-call
capability
• Suitable for high noise areas
• 24 V ac or dc power • Optional footswitch
• Footswitch input • Optional headset
• 12-watt Class-D speaker amplifier • Optional noise-canceling gooseneck microphone
• 0 dBm, 600-ohm audio line driver • Protection against feedback
• Volume control • Simplex, switched duplex, and full-duplex capable
• 16-button keypad • Call transfer
• Optional Talk/Listen control • Conference calling
• Configurable buttons • Two configurable outputs
• Call status indicator • Suitable for Div. 2 Hazardous Areas
• Noise-canceling handsets • UL Listed
• Hands-free operation • CE Mark
• Two configurable inputs
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Available Models
Wall-Mount Handset Intercoms (Indoor/Outdoor)
The Model DHS-101 Wall-mou n t Hand se t Inter com has a built-in speaker amplifier and external audio
output with an optional headset jack.
Wall-Mount Hands-free Intercoms (Indoor/Outdoor)
The wall-mount hands-free intercoms include a built-in speaker amplifier and external audio output.
They are available with an optional gooseneck mic or a headset jack.
Models DHF-101 (NEC Div. 2) Single Button Wall- mount Hand s- free Interc om includes a single
programmable push button for call-in only.
Models DHF-102 (NEC Div. 2) Wall-mount Hands-free Intercom with 16-Button Keypad includes
two programmable push buttons.
Figure 2. Model DHS-101
Flush-Mount Hands-free Intercoms
The flush-mount hands-free models include a
built-in speaker amplifier and external audio
output, and are available with an optional
gooseneck microphone.
Model DHF-103 Single Button Flush-Mount
Hands-free Intercom includes a single
programmable push button for call-in only.
Model DHF-104 Flush-Mount Hands-free
Intercom with 16-Button Keypad includes two
programmable push buttons.
Figure 3. Models DHF-101 and DHF-102
Figure 4. Models DHF-103 and DHF-104
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Description of Major Components
The Digital Intercom Stations are made up of a front panel assembly and a rear enclosure.
The following assemblies are mounted on the interior side of the front panel:
• 69539-00X Audio/Interface PCB Assembly.
• 69547-00X Intercom PCB Assembly
Refer to Figure 5 below. The front panel contains the user interface components (microphone, speaker,
status LED, keypad, and handset) in addition to the 69539-00x Audio/Interface PCBA that provides all
terminations except earth ground. This PCBA also contains controls for volume, gain, and switch
configuration.
The 69547-00x Intercom PCBA connects to the Audio Interface PCBA from below to transmit/receive
audio, data, and control information to and from the central control cabinet. The rear enclosure protects
the electronics from the harsh environment, and also contains the termination for earth ground.
Figure 5. Front Panel Assembly with Intercom and Audio Interface PCBAs
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Installation
General Information
WARNING
This equipment is suitable for use in Class I, Division 2, Groups A, B, C and
D, Class II Division 2, Groups F, and G, Class III OR non-hazardous locations only. Combinations
of equipment in your system are subject to investigation by the local Authority Having Jurisdiction
at the time of installation.
WARNING
EXPLOSION HAZARD – Do not disconnect equipment unless power has
been removed or the area is known to be non-hazardous.
WARNING
EXPLOSION HAZARD - Substitution of components may impair suitability
for Class I, Division 2.
Averttissement – Risque d’explosion - la substitition de composants peut rendre ce matériel
inacceptable pour les em-placements de Classe 1, Division 2.
Averttissement – Risque d’explosion – avant de déconnector l’equipment, couper le courant ou
s’assurer que l’emplacement est désigné non dandereux.
Install equipment without modification and according to all applicable local and national electrical codes.
USA and Canada Consult the National Electrical Code (NFPA 70), Canadian Standards Association
(CSA 22.1), and local codes for specific requirements regarding your installation. Class 2 circuit wiring
must be performed in accordance with NEC 725.55.
Station Placement
This station contains a high gain amplifier, which enables operation in high noise environments. To
prevent feedback problems in the system, the ambient noise levels, volume settings, and station placement
must be taken into consideration. Unpleasant feedback problems can be reduced by taking the following
measures:
• Pointing the speaker away from nearby Intercom Stations
• Placing the speakers in separate rooms from Intercom Stations
• Reducing volume levels
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Mounting
Models DHS-101, DHF-101, and DHF-102
The mounting and wiring instructions for the model
listed above are as follows:
1. Remove the four tamper-resistant screws from the
front of the intercom station, and separate the
front panel from the rear enclosure. Place the
front panel and screws in a safe location.
2. Secure the rear enclosure to the mounting surface
using the four 0.28-inch (7.11-mm) mounting
holes provided along with four ¼-inch (M6)
diameter bolts of the appropriate length for the
mounting surface.
3. Install the field wiring according to the
instructions provided on page 9.
Figure 7. Model DHS-101
Figure 6. Model DHF-102
4. Using the appropriate section of this manual,
make the necessary set-up changes:
• Adjust the audio levels as described in the
“Audio Level Adjustments” section beginning
on page 12.
• Make any necessary hardware configuration
changes as described in the “Switch
Configuration” section on page 15.
• Refer to page 16 for the initial programming
options.
5. Complete the installation by reattaching the front
panel assembly to the rear enclosure using the
four tamper-resistant screws. Use a torque setting
of 30 in-lbs. or 35 cm-kg.
6. Verify that the unit is operating as described in the
“Operation” section beginning on page 18.
OTE: When using the GAI-Tronics Model 231 Pole
N
Mounting Kit, follow the mounting instructions
provided in the kit.
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Models DHF-103 and DHF-104
1. For flush-mount installations, mount the included back box in the desired location using appropriate
hardware. Refer to Figure 10 on page 8 for cutout dimensions.
2. Install the wiring and cable fitting through either the top or bottom cutout. Bottom entry is
recommended.
Figure 8. Model DHF-103
Figure 9. Model DHF-104
3. When the cable has been pulled into the enclosure, complete the field wiring according to the Field
Wire Installation instructions provided on page 9.
4. Using the appropriate section of this manual, make the necessary set-up changes:
• Adjust the audio levels as described in the “Audio Level Adjustments” section beginning on page
12.
• Make any necessary hardware configuration changes as described in the “Switch Configuration”
section on page 15.
• Refer to page 16 for the initial programming options.
5. Complete the installation by attaching the front panel assembly to the rear enclosure using the six
tamper-resistant screws.
6. Verify that the unit is operating as described in the “Operation” section beginning on page 18.
For mounting Models DHF-103 and DHF-104 in GAI-Tronics Model 236 Surface-Mount Enclosure and
Model 234/234WM Stanchions, please refer to the installation manual included with the enclosure or
stanchion. The installation manuals are also available at www.gai-tronics.com.
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Figure 10. Model DHF-103 and DHF-104 Mounting Details
Conduit Installation
Metallic Conduit Installation Details
To prevent moisture from entering the enclosure, we strongly recommend the following:
• Conduit should enter the enclosure from the bottom.
• Silicone sealant or equivalent should be applied around and inside all conduit entries.
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Field Wire Installation
Installation of this equipment shall be carried out by suitably-trained personnel in
accordance with the applicable code of practice concerning equipment and protective
systems intended for use in potentially Explosive Atmospheres.
1. Unfasten the front panel assembly.
2. Pull the field wiring through the conduit entrance in the rear of the enclosure. The use of ferrules is
recommended on the ends of stranded wire to create a secure, reliable connection.
3. Install all connections as indicated below. Refer to Figure 11 for wiring details. Refer to Table 1 and
Table 2 on page 11 for the recommended conductor sizes and lengths.
N
OTE: USA and Canada Consult the National Electrical Code (NFPA 70), Canadian Standards
Association (CSA 22.1), and local codes for the specific requirements regarding your installation. Install
all equipment without modification and according to the local and national codes. Class 2 circuit wiring
must be performed in accordance with NEC 725.55.
Power
Central Power
This assembly is capable of operating without a 24 V ac or dc power source. When a 24 V dc power
source is not connected to P46, this station is powered by the central cabinet via the system cable. This
will limit the functionality of this station and limit the distance from the central cabinet. The following
functions will not
be operational when central power is used:
• External speaker amplifier
• Audio line driver
• Headset operation
• Configurable outputs
The enclosure must be connected to earth ground. Install a ring lug on the ground conductor prior to
connection to the enclosure. Secure the ring lug to the #6 ground screw on the rear enclosure.
Local Power
This assembly requires a 24 V ac or dc power source for the station to be fully functional. The following
functions are enabled when central power is used:
• External speaker amplifier
• Audio line driver
• Headset operation
• Configurable outputs
A separate power feed is recommended for each intercom station. A pluggable terminal block P46 is
provided for connection of power to the station. Power leads can be connected to either L1 or L2 in ac or
dc systems. Also, the enclosure must be connected to earth ground. Install a ring lug on the ground
conductor prior to connection to the enclosure. Secure the ring lug to the #6 ground screw on the rear
enclosure.
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Figure 11. Typical Station Installation
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System
This station requires a two-conductor twisted pair cable run between the station and the central cabinet.
Cable capacitance is critical to the station performance on long distances. Refer to Table 1 for the
maximum system cable lengths and Table 2 for the recommended cable sizes. Terminate the system
cable on terminal block P44 pins 5 and 6 (Data A and B).
Table 1.
Maximum System Cable Lengths
Cable Capacitance 22 AWG (0.325 mm2) 20 AWG (0.519 mm2)
30.5 nf/1000 feet (304.8 m) 6562 feet (2000 m) 6562 feet (2000 m)
13.7 nf/1000 feet (304.8 m) 6562 feet (2000 m)/
9843 feet (3000 m)
9843 feet (3000 m) with local 24 V power
Table 2.
Recommended Ca ble Sizes
Cable Use Size
System Two-conductor twisted pair, No. 22 AWG (0.325 mm2) is typical
Power Three-conductor, No. 18 AWG (0.823 mm2) is typical
Footswitch, inputs, audio line Two-conductor, No. 22 AWG (0.325 mm2) is typical
Output contacts Two-conductor twisted pair, No. 18 AWG (0.823 mm2) is typical
Speaker cable Two-conductor twisted pair, No. 18 AWG (0.823 mm2) is typical
Audio
External Speaker
If this station is located in a high noise area, an external speaker or horn can be used to broadcast audio
received by this station. Terminate the external speaker or horn on terminal block TB14.
Audio Output to Remote A mps
Audio received by this station can be transmitted to remote amplifier stations for broadcast into high noise
areas. Terminal block TB1 has been provided to connect audio to the remote amplifiers.
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Audio Level Adjustments
NOTE: The following adjustments should only be performed after the Intercom Level Setting RM has
been set (factory setting) and the Master Volume Adjustment (keypad control) has been set to mid-range.
Refer to Figure 12 for locations.
Figure 12. Setting Locations
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Handset Receiver Volume
Potentiometer R73 has been provided for individual adjustment of the handset receiver volume. To
increase the handset volume, rotate R73 (HNDST VOL) clockwise. To decrease the volume, rotate R73
counterclockwise.
Unit Speaker Level
Potentiometer R75 has been provided for individual adjustment of the unit speaker volume. To increase
the speaker volume, rotate R75 (UNIT SPKR VOL) clockwise. To decrease the volume, rotate R75
counterclockwise.
Headset Receiver Level
Potentiometer R79 has been provided for individual adjustment of the headset receiver volume. To
increase the headset volume, rotate R79 (HDST VOL) clockwise. To decrease the volume, rotate R79
counterclockwise.
AGC (Automatic Gain Control)
This station is equipped with an automatic gain control circuit in order to minimize level changes on the
audio line and the external speaker. The master volume control (keypad) affects the audio level received
by this station. The master volume control enables the handset, headset, and unit speaker levels to be
controlled via the keypad, but it also affects the audio level supplied to the audio line and external
speaker; therefore, an automatic gain control circuit has been added. This adjustment has been factory set
and should only be performed by certified Field Service Personnel.
AGC Bypass
If necessary, the AGC circuitry can be bypassed. To bypass the AGC, move the jumpers on P8 and P9
from IN to the OUT position.
OTE: The following adjustments should only be performed after the Intercom Level Setting RM has
N
been set (factory setting), the Master Volume Adjustment (keypad control) has been set to mid-range, and
the AGC has been set.
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External Speaker Volume Control
A speaker amplifier has been provided to enable this station to be used in high noise areas. Potentiometer
R43 has been provided for volume control. To increase the volume to the speaker, rotate R43 clockwise.
To decrease the volume to the speaker, rotate R43 counterclockwise.
OTE: This station will broadcast received audio over the external speaker or horn only when the station
N
is powered by 24 V, the station’s handset is on-hook or the (optional) headset is not connected. Received
audio is not broadcast over the external speaker if 24 V power is not supplied, the station’s handset is offhook or a headset is installed.
External Speaker Gain
The external speaker amplifier contains four user adjustable gain settings:
• 0 dB
• 6 dB
• 12 dB
• 24 dB
These settings enable the user to control the maximum gain of the speaker amplifier. The 24-dB setting
provides the maximum gain from the amplifier and the 0-dB setting enables the minimum gain.
Configuration jumpers P36 (GAIN0) and P37 (GAIN1) have been supplied to set the gain. Refer to Table
3 for the desired gain settings.
Table 3. Gain Setting
Setting
0 dB
6 dB
12 dB
24 dB
Jumper
P37
Jumper
P36
0 0
0 1
1 0
1 1
Audio Output to Remote A mps
A 600-ohm audio output driver has been provided to enable audio received by this station to be broadcast
over the speakers connected to Model DSA-101 Remote Speaker Amplifiers. This enables additional
areas close to this station to receive audio sent to this station.
OTE: This station will broadcast received audio to the remote amplifiers only when the station is
N
powered by 24 V, the handset is on-hook or the headset is not connected. Received audio is not broadcast
to the remote amplifiers when 24 V power is not supplied, the station’s handset is off-hook or the optional
headset is installed.
Audio Output Level
The nominal level on this output is set to 0.775 V
. To increase the audio output level, rotate R47
rms
(Audio Line Level) clockwise. To decrease the audio output level, rotate R47 counterclockwise.
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Switch Configuration
A set of configuration jumpers has been provided for panel switches SW1 and SW2. These configuration
jumpers enable switches SW1 or SW2 to be set as a button on the keypad matrix or one of the
programmable inputs IN1 or IN2.
SW1
Configuration jumpers labeled R1-R4 and C1-C5 (on P14 and P29) enable switch SW1 to be set as a
single button of the keypad matrix. For example: to configure switch SW1 as keypad button 5, install the
jumpers on row R2 and column C2. Two configuration jumpers labeled C_GND and IN1 (on P18 and
P23) enable switch SW1 to be set as programmable input IN1. To set switch SW1 as input IN1, install
the jumpers on C_GND and IN1.
OTE: The function of input IN1 must be programmed in the central cabinet. Refer to the “Inputs”
N
section of the central cabinet instruction manual for instructions on how to program this input. Also, the
footswitch input shares the programmable input IN1 with SW1. Either the footswitch can use
programmable input IN1 or SW1, but not both.
SW2
Configuration jumpers labeled R1-R4 and C1-C5 (on P13 and P1) enable switch SW2 to be set as a single
button of the keypad matrix. For example: to configure switch SW2 as keypad button 9, install the
jumpers on row R3 and column C3. Two configuration jumpers labeled C_GND and IN2 (on P7 and
P12) enable switch SW2 to be set as programmable input IN2. To set switch SW2 as input IN2, install
the jumpers on C_GND and IN2.
OTE: The function of input IN2 must be programmed in the central cabinet. Refer to the “Inputs”
N
section of the central cabinet instructional manual for instructions on how to program this input.
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Inputs
Two programmable inputs (IN1 and IN2) have been provided on this assembly. Inputs IN1 and IN2 can
be programmed to perform a variety of functions such as: initiating dialing, changing button functions,
initiating alarms, etc. Termination of the input contacts have been provided on terminal block P44 pins 14 (IN1 +/-, IN2 +/-).
OTE: Input IN1 is shared with the footswitch and SW1 inputs; therefore, this input can only be used
N
when the footswitch and SW1 are not in use. Input IN2 is shared with the SW2 input, therefore, this input
can only be used when SW2 is not in use. Please refer to the “Inputs” section of the central cabinet
instruction manual for instructions on how to program these inputs.
Footswitch
A programmable footswitch input has been provided on this assembly. Termination for the input contact
has been provided on terminal block P45 pins 7-8 (footswitch +/−). The footswitch can be programmed
to perform a variety of functions such as: talk/listen control (T button function), direct dialing, etc. The
footswitch input shares the programmable input IN1 with SW1. Either the footswitch can use
programmable input IN1 or SW1, but not both.
OTE: The function of input IN1 must be programmed in the central cabinet. Refer to the “Inputs”
N
section of the central cabinet instruction manual for instructions on how to program this input.
Outputs
Two programmable opto-coupler outputs (OUT1 and OUT2) have been provided on this assembly.
Termination for the output have been provided on terminal block P45 pins 2-3 [OUT2 (−), (+)] and pins
4–5 and [OUT1 (−), (+)]. Outputs OUT1 and OUT2 can be programmed to perform a variety of
functions such as: conversation active, loudspeaker active, PA announcement, pre-defined conference
active, all call or group call received, door opener, etc. Please refer to the “Outputs” section of the central
cabinet instruction manual for instructions on how to program these outputs.
Refer to Figure 13 for a typical system interconnection.
OTE: The outputs can only be used when the station is powered by 24 V.
N
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Figure 13. Typical system interconnection diagram
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Operation
Hands-free Operation
1. Press a call button located on the front panel. Optional: Use the 16-button keypad to dial the
extension of the desired station. The front panel LED illuminates to indicate a call is in progress.
2. Speak into the panel microphone to transmit audio. If necessary, talk/listen control can be controlled
using the T button on the keypad or by using the station’s footswitch input.
3. Audio is broadcast over the station’s speaker.
OTE: Audio will not be broadcast over the external speaker or remote amplifiers if 24 V power
N
is not supplied.
4. Terminate the call by depressing the X button.
Handset Operation
1. Using the 16-button keypad, dial the extension of the desired station or press a call button located on
the front panel. The front panel LED illuminates to indicate a call is in progress.
2. Speak into the handset microphone. If necessary, talk/listen can be controlled using the T button on
the keypad or by using the station’s footswitch input.
3. Audio will be received over the handset receiver. N
OTE: Audio will not be broadcast over the
handset, external speaker, or Remote Amplifiers whenever the optional headset is installed or if 24 V
power is not
supplied.
4. Terminate the call by depressing the X button or placing the handset on hook.
5. If an incoming call (or page, alarm, or music) is received while the handset is on hook, the audio is
broadcast over the station’s speaker. The external speaker and the remote amplifiers will also
broadcast the audio if 24 V power is supplied to the unit. If the handset is off hook, then audio is
broadcast over the handset receiver.
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Headset Operation
NOTE: 24 V power is required.
1. Connect the headset to the 8-pin headset jack on the front panel.
2. Using the 16-button keypad, dial the extension of the desired station. Optional - Press a call button
located on the front panel. The front panel LED illuminates to indicate a call in progress.
3. Speak into the headset microphone to transmit audio. If necessary, talk/listen control can be
controlled using the T button on the keypad or by using the station’s footswitch input.
4. Audio is received over the headset receiver. N
OTE: Audio will not broadcast over the handset,
external speaker, or Remote Amplifiers whenever the headset is installed.
5. Terminate the call by depressing the X button.
6. If an incoming call, page, alarm, or music arrives while the headset is connected, the audio will be
broadcast over the headset receiver but will not broadcast over the station’s speaker, the external
speaker, or the Remote Amplifiers.
Paging
This station is capable of sending and receiving all-calls and group calls. Refer to the “All-Call” and
“Group Call” sections of the central cabinet instruction manual for configuration details. Hands-free
stations will broadcast pages over the external speaker and remote amplifiers.
NOTE
handset is off hook or the optional headset is installed or 24 V power is not
Pages are not broadcast over the external speaker and Remote Amplifiers whenever the
supplied.
Alarms and Music
This station is capable of receiving alarms and music. Refer to the “Alarms” and “Music” sections of the
central cabinet instruction manual for configuration details. Hands-free stations will broadcast alarms and
music over the external speaker and remote amplifiers.
NOTE
Alarms and music will not broadcast over the external speaker and remote amplifiers
whenever the handset is off-hook, the optional headset is installed, or 24 V power is not
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Status Indication
Call Status
A status LED is provided on the front panel to indicate the call status. This LED is normally active when
a conversation is enabled. For additional status information, refer to the central cabinet instruction
manual.
Controls
Keypad
The keypad performs a variety of functions such as: dialing, talk/listen control, call cancel, volume
control, etc. For handset stations, you must go off hook prior to dialing.
Single Button Dialing
A single button or button sequence can be dialed to call another station. Press the pre-programmed
keypad sequence to initiate dialing. For handset stations, you must go off-hook prior to dialing. Refer to
the “Direct Dialing” section of the central cabinet instruction manual for instructions on how to program
these buttons.
Talk/Listen Control
The T button can be used to control talk/listen switching. This button can be programmed to press and
hold or touch and go. When using press and hold control, press and hold the T button when speaking and
release to listen. When using touch and go control, press and release the T button each time you want to
speak. Handset stations must be off hook in order to use this function. Refer to the “T Button” section of
the central cabinet manual for instructions on how to program this button.
Call Cancel
The X button can be used to cancel the call. For handset stations, the call is cancelled when you place the
handset on hook.
Master Volume
The volume level to the station's speaker, unit handset, or unit headset can be adjusted using the keypad.
The volume level will increase each time the up arrow is pressed until the maximum volume limit is
reached. The volume level will decrease each time the down arrow is pressed until the minimum
volume limit is reached. To save the volume setting, press the enter button.
OTE: This is a master volume control that affects the volume of the station’s speaker, unit handset or
N
unit headset. This control may affect the audio line level and the external speaker volume for units that
have the AGC disabled.
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Maintenance
WARNING
Always remove power to this station prior to servicing.
General Information
1. Inspect and replace frayed or cracked wiring.
2. Secure/replace loose wires, ferrules, and terminal lugs.
3. Remove corrosion from terminals.
4. Inspect fuses F2, F5, and F6 of the Audio Interface PCBA.
Troubleshooting
Problem Possible Solution
Low volume
(unit speaker, handset
receiver, or headset
receiver)
1. Increase the volume settings via potentiometer R75 (UNIT SPKR), R73
(HNDST VOL).
2. Increase the Master Volume setting via the front panel keypad and press
Enter.
3. Increase the Intercom Level Setting of the 69547-001 Intercom Assembly
by rotating the potentiometer RM counterclockwise. Caution! This will
affect the mic/speaker switching levels.
High volume
(unit speaker, handset
receiver, or headset
receiver)
Low volume
(external speaker)
High volume
(external speaker)
1. Decrease the volume settings via potentiometer R75.
2. Decrease the Master Volume setting via the front panel keypad and press
Enter.
3. Decrease the Intercom Level Setting of the 69547-001 Intercom
Assembly by rotating the potentiometer RM clockwise. Caution! This
will affect the mic/speaker switching levels.
1. Increase the volume settings via potentiometer R43 (EXT SPKR
LEVEL).
2. Increase the Master Volume setting via the front panel keypad and press
Enter.
3. Increase the gain setting on P36/P37.
4. Increase the Intercom Level Setting of the 69547-001 Intercom Assembly
by rotating the potentiometer RM counterclockwise. Caution! This will
affect the mic/speaker switching levels.
1. Decrease the volume settings via potentiometer R75.
2. Decrease the Master Volume setting via the front panel keypad and press
Enter.
3. Decrease the gain setting on P36/P37.
4. Decrease the Intercom Level Setting of the 69547-001 Intercom
Assembly by rotating the potentiometer RM clockwise. Caution! This
will affect the mic/speaker switching levels.
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Problem Possible Solution
No output on external
speaker or audio line.
No output on headset
1. Verify the AGC Bypass jumpers P8/P9 are either both IN or both OUT.
2. Verify 24 V power is present at P46.
Verify 24 V power is present at P46.
receiver.
No audio to unit
Verify the shorting clip is installed between hookswitch pins P43-2 & P43-3.
speaker (hands-free
units only)
Front panel push
buttons not operational
1. Verify the switch configuration jumpers are properly installed.
2. Verify the inputs IN1 and IN2 of the subscriber are enabled and properly
programmed. Refer to the central cabinet manual for details.
Inputs not operational Verify the inputs IN1 and IN2 of the subscriber are enabled and properly
programmed. Refer to the Central Cabinet Manual for details.
Outputs not
operational
1. Verify the outputs OUT1 and OUT2 of the subscriber are enabled and
properly programmed. Refer to the central cabinet manual for details.
2. Verify 24 V power is present at P46.
Cannot make or
Verify the system cable is installed properly.
receive calls
No power indication Verify power is applied to the unit at P46. Check fuses F5/F6. Replace fuses
with identical rating/type.
Fault indication An amplifier fault is an indication that a speaker line fault has occurred.
Repair the speaker line fault and cycle power (Off/On) in order to reset the
fault indication.
Feedback 1. Point the speakers away from the interfering station.
2. Reduce the speaker volume.
3. Increase the distance between the speaker and the interfering station.
4. Use T button to control talk/listen control.
5. Two Digital Intercom stations can be barred from communication. Refer
to the “Protection Against Feedback Configuration” section of the central
switch manual for details.
Service
If your Intercom Station requires service, contact your Regional Service Center for a return authorization
number (RA#). Equipment should be shipped prepaid to GAI-Tronics with a return authorization number
and a purchase order number. If the equipment is under warranty, repairs will be made without charge.
Please include a written explanation of all defects to assist our technicians in their troubleshooting efforts.
Call 800-492-1212 inside the USA or 610-777-1374 outside the USA for help identifying the Regional
Service Center closest to you.
Replacement Parts
Contact GAI-Tronics for replacement part information.
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Specification s
Power input (24 V ac) ......... Voltage ................................................................................ 24 V ac, 50/60 Hz
Power consumed ..........................................................36 VA, 30 watts (max.)
Power input (24 V dc)......... Voltage................................................................................................. 24 V dc
Power consumed ............................................................. 29 watts (maximum)
Speaker amplifier**............ Output............................................... Class D, 12 watts maximum into 8 ohms
Frequency response............................. 200–7,000 Hz, +0/−3 dB ref. @ 1 kHz
Distortion............................................ 2% maximum THD @ 1 kHz, 12 watts
Hum and noise........................................................... −55 dB (20 Hz–20 kHz)
Loudspeaker.........................................................................................................................................8 ohms
Audio Line Driver**........... Output................................................................. 0 dBm @ 600 ohms, nominal
Frequency response............................. 200–7,000 Hz, +0/−3 dB ref. @ 1 kHz
Distortion......................................... 2% maximum THD @ 1 kHz, 0.775 V
Hum and noise........................................................... −55 dB (20 Hz–20 kHz)
Indicators ............................ External ............................................................................................Call Status
Internal** ......................................................................................Power, Fault
Controls............................... External .............................................................Keypad*, push-button inputs*
Internal .............................Speaker Volume, Speaker Gain, Audio Line Level,
Handset Volume, Unit Speaker Volume, Headset Volume**,
AGC Level**, AGC Bypass**
Inputs ...........................................................................................Two configurable inputs, footswitch input
Outputs**............................................................................................................... Two configurable outputs
30 V dc/100 mA maximum switching
Headsets**......................................................................................................................Headset Connector*
System cabling.................... Power........................................................No. 12–18 AWG (3.33–0.823 mm
Audio........................................................No. 16–24 AWG (1.31–0.205 mm
Inputs/outputs...........................................No. 16–24 AWG (1.31–0.205 mm
Temperature range ............................................................................... −4º F to + 140º F (−20º C to +60º C)
*Not available on all models.
**Operational on locally powered units only.
rms
2
2
2
)
)
)
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Models DHF-1 01, DHF 102, and D HS 101
Construction......................................................................................... Cast aluminum painted safety orange
Dimensions ........................................................9.5 H × 8.0 W × 4.0 D inches (241.3 × 203.2 × 101.6 mm)
Weight................................. DHF-101.................................................................................................8.0 lbs.
DHF-102.................................................................................................8.7 lbs.
DHS-101.................................................................................................9.2 lbs.
Models DHF-103 and DHF 104
Construction........................ Panel...............................................................14-gauge brushed stainless steel
Back box................. 16-gauge cold rolled steel with black polyurethane finish
Dimensions ......................... Panel.............................................. 12.0 H × 10.0 W inches (304.8 × 254 mm)
Back box (depth from mounting surface)...................... 2.38 inches (60.5 mm)
Weight................................. DHF-103.................................................................................................7.0 lbs.
DHF-104.................................................................................................7.5 lbs.
Approvals
NRTL Listed for USA and Canada
Class I, Div. 2, Groups A, B, C, and D, T4
Class II, Div. 2, Groups F and G
Class III, Div. 2
CE Mark
Safety of Information Technology Equipment ...... UL 60950, CAN/CSA-C22.2 No. 60950-00, IEC 60950
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Warranty
Equipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any
GAI-Tronics equipment supplied hereunder shall be free of defects in material and workmanship, shall
comply with the then-current product specifications and product literature, and if applicable, shall be fit
for the purpose specified in the agreed-upon quotation or proposal document. If (a) Seller’s goods prove
to be defective in workmanship and/or material under normal and proper usage, or unfit for the purpose
specified and agreed upon, and (b) Buyer’s claim is made within the warranty period set forth above,
Buyer may return such goods to GAI-Tronics’ nearest depot repair facility, freight prepaid, at which time
they will be repaired or replaced, at Seller’s option, without charge to Buyer. Repair or replacement shall
be Buyer’s sole and exclusive remedy. The warranty period on any repaired or replacement equipment
shall be the greater of the ninety (90) day repair warranty or one (1) year from the date the original
equipment was shipped. In no event shall GAI-Tronics warranty obligations with respect to equipment
exceed 100% of the total cost of the equipment supplied hereunder. Buyer may also be entitled to the
manufacturer’s warranty on any third-party goods supplied by GAI-Tronics hereunder. The applicability
of any such third-party warranty will be determined by GAI-Tronics.
Services. Any services GAI-Tronics provides hereunder, whether directly or through subcontractors,
shall be performed in accordance with the standard of care with which such services are normally
provided in the industry. If the services fail to meet the applicable industry standard, GAI-Tronics will
re-perform such services at no cost to buyer to correct said deficiency to Company's satisfaction provided
any and all issues are identified prior to the demobilization of the Contractor’s personnel from the work
site. Re-performance of services shall be Buyer’s sole and exclusive remedy, and in no event shall GAITronics warranty obligations with respect to services exceed 100% of the total cost of the services
provided hereunder.
Warranty Periods. Every claim by Buyer alleging a defect in the goods and/or services provided
hereunder shall be deemed waived unless such claim is made in writing within the applicable warranty
periods as set forth above. Provided, however, that if the defect complained of is latent and not
discoverable within the above warranty periods, every claim arising on account of such latent defect shall
be deemed waived unless it is made in writing within a reasonable time after such latent defect is or
should have been discovered by Buyer.
Limitations / Exclusions. The warranties herein shall not apply to, and GAI-Tronics shall not be
responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent
caused by Buyer’s neglect, failure to follow operational and maintenance procedures provided with the
equipment, or the use of technicians not specifically authorized by GAI-Tronics to maintain or service the
equipment. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE IN LIEU OF AND
EXCLUDE ALL OTHER WARRANTIES AND REMEDIES, WHETHER EXPRESS OR IMPLIED BY
OPERATION OF LAW OR OTHERWISE, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Return Policy
If the equipment requires service, contact your Regional Service Center for a return authorization number
(RA#). Equipment should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the equipment is under warranty, repairs or a replacement will be made in
accordance with the warranty policy set forth above. Please include a written explanation of all defects to
assist our technicians in their troubleshooting efforts.
Call 800-492-1212 (inside the USA) or 610-777-1374 (outside the USA) for help identifying the
Regional Service Center closest to you.
(Rev. 10/06)
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