David Clark 44002G-01 User manual

19549P-82 (11-16) 2016 DAVID CLARK COMPANY INCORPORATED
USER MANUAL
Digital Wireless Gateway
U9120-W4
(P/N: 44002G-01)

19549P-82 (11-16) Page 1 of 8
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Ca au ut ti io on ns s a an nd d W Wa ar rn ni in ng gs s
READ AND SAVE THESE INSTRUCTIONS. Follow the instructions in this installation
manual. These instructions must be followed to avoid damage to this product and
associated equipment. Product operation and reliability depends on proper usage.
DO NOT INSTALL ANY DAVID CLARK COMPANY PRODUCT THAT
APPEARS DAMA ED. Upon unpacking your David lark product,
inspect the contents for shipping damage. If damage is apparent,
immediately file a claim with the carrier and notify your David lark
product supplier.
ELECTRICAL HAZARD
-
Disconnect electrical power when making any
internal adjustments or repairs. All repairs should be performed by a
representative or authorized agent of the David lark ompany.
STATIC HAZARD
-
Static electricity can damage components.
Therefore, be sure to ground yourself before opening or installing
components.
LI-POLYMER - This product is used with Li-Polymer batteries. Do not
incinerate, disassemble, short circuit, or expose the battery to high
temperatures. Battery must be disposed of properly in accordance
with local regulations.

19549P-82 (11-16) Page 2 of 8
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Ov ve er rv vi ie ew w
The U9120-W4 (44002G-01) Digital Wireless Gateway is a fixed-mounted wireless
communication device that, when used in conjunction with the Digital Intercom System and one
or more U9100-series Wireless Belt Stations, becomes part of a digital wireless intercom system.
The U9120-W4 provides communication for up to four users and integrates with the Digital
Intercom System. Up to four belt stations can be connected to one gateway.
Figure 1: Overview of ateway

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In ns st ta al ll la at ti io on n
Intercom Interface
The U9120-W4 is designed to add wireless capability to the Digital Intercom System.
Mounting
Select a location on a flat surface that is out-of-the-way, and provides adequate room to attach
all cables. The U9104-W4 is immersion-proof (IP67). However where possible the mounting
location should be chosen to minimize direct exposure to the elements.
qPosition the endpoint on the surface to be mounted and mark the (4) hole locations.
qDrill the (4) holes with 13/32-inch drill bit.
qMount the endpoint with #8 mounting screws and nuts/lock-washers (customer supplied).
Alternately, the U9104-W4 may be flush-mounted with the optional flush-mount kit (M9110FM,
44004G-02) or the 44003G-01 gasket-mount kit.
Antenna
The U9120-W4 has an internal antenna. An external antenna may not be necessary but the
antenna connector is provided for either the included whip antenna or an optional remote
antenna kit (P/N: 40688G-93 for mag-mount, 40688G-96 for permanent install).
hoose an open, clear location for the remote antenna, away from other RF-emitting devices,
and route the coaxial cable away from any busy areas, preferably behind panels or in conduits.
This device has been designed to operate with the antennas listed below, and having a
maximum gain of 3 dB. Antennas not included in this list or having a gain greater than 3 dB are
strictly prohibited for use with this device. The required antenna impedance is 50 ohms.
Acceptable antennas for use with this product:
•Whip Antenna (P/N: 40688G-92)
•Remote Antenna Kit, Mag-Mount (P/N: 40688G-93)
•Remote Antenna Kit, Permanent (P/N: 40688G-96)

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Li in nk ki in ng g
Before a belt station and a gateway can be connected, they must first be linked. As a security
measure, the close-link feature requires devices to be in proximity of between 1 to 3 ft (0.3 to
0.9m) in order to successfully link. This ensures that the units are not inadvertently linked with
other units on the premises.
Linking procedure:
1. Ensure units are within 1 to 3 ft (0.3 to 0.9m) of each other.
2. Simultaneously (within 1-2 sec) press and release the LINK button on the U9120-W4 and
the LINK/PTT button on the belt station to link with.
3. Amber LED’s will flash on both devices. A momentary red LED indicates a successful
close-link.
4. Upon successful link the U9120-W4 will attempt to establish a connection with the belt
station.
5. Upon successfully establishing connection the LED on the gateway will flash a green
pattern corresponding to the number of belt stations connected.
Tip:
Once linked, the devices will not need to be linked again unless they are purged (see
Purging).
Each belt station is able to be linked to only one gateway at a time. A gateway can have up to
five belt stations linked and be connected to four of those five at one time.
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St ta at tu us s I In nd di ic ca at ti io on ns s
The front panel has a multi-color LED in the center which serves as a status indication for the
gateway. Table 1 below lists these states.
Table 1: LED Status Indications
LED Color
Blink Rate
Status
Red
Solid
Initializing/power up
Red
Once
onnection Dropped
Red
Once
onnection Established
Orange
Slow
Idle/Disconnected
Orange
Fast
Link/ onnection in P
rogress
Orange
Solid
PTT asserted
Green
Slow
onnected (pattern indicates
number of belt stations connected)

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Op pe er ra at ti io on n
Communication
ommunication is defined by the Digital Intercom System and configured by the graphical user
interface. See the Digital Intercom System manual (19549P-31) for more information.
Range
The unimpeded line-of-sight range of a belt station and a gateway should be at least 300 ft
(100m). If you are in an environment with metal or concrete walls, this range could be reduced.
If the belt station enters into a "fringe" reception area, a brief sequence of three beeps will be
heard in the headset. This is to serve as a warning of a possible disconnection if conditions are
not improved. When possible, the user should attempt to regain line-of sight contact with the
gateway. When the belt station travels out of range of the gateway, a voice prompt will indicate
that the connection has been lost. To reconnect, simply move back into range and connection
with the gateway will automatically be reestablished, also noted by a voice prompt.
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Pu ur rg gi in ng g
In some circumstances it may be desired to “purge” the U9120-W4 of some of its linked belt
stations. Typically purging is not necessary unless there are multiple gateways in the same
vicinity and you wish to remove a belt station from this gateway and link to a different gateway.
A gateway can link up to five belt stations where a belt station can be linked to only one gateway
at a time.
Smart Purge
A smart purge is the purge method employed for the U9120-W4, in which only unwanted links
are removed from the gateway. When this procedure is complete, only belt stations that are
connected to the gateway remain linked. All other belt station links will have been removed (see
the belt station User Manual for the individual belt station purging procedure when remaining
link purging may be necessary.)
Smart Purge procedure
1. Ensure the gateway is powered on and functioning.
2. Disconnect all belt stations to be purged (power off the belt stations).
3. Verify the number of green LED flashes on the gateway matches the number of
belt stations to be kept linked.
4. Press and hold LINK button on the gateway for 30 seconds until LED quickly
flashes red.
5. Release LINK button.

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Tr ro ou ub bl le es sh ho oo ot ti in ng g
Table 2: Troubleshooting
Problem
Solution
Gateway will not turn on
heck at5E cable and RJ
-
45 connectors
attached between gateway and Master
Station
annot link a belt station
Review
Linking
procedure
Ensure units are within 1 to 3ft (0.3 to 0.9m)
of each other while linking
Try a Smart Purge and attempt link again
annot speak over two
-
way radio
Belt Station
PTT not pressed
Two-way radio not installed to system
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Re ep pl la ac ce em me en nt t P Pa ar rt ts s
•Whip Antenna (P/N: 40688G-92)
•Remote Antenna Kit, Mag-Mount (P/N: 40688G-93)
•Remote Antenna Kit, Permanent (P/N: 40688G-96)
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Ca ar re e a an nd d M Ma ai in nt te en na an nc ce e
The U9120-W4 is not user serviceable. Do not attempt to open the enclosure. If this product
requires service, please contact the David lark ustomer Service department:
•Phone: [phone]
•E-Mail: serviceWWW@David lark.com
•By Mail: ustomer Service
David lark ompany
360 Franklin Street
Worcester, MA 01604
When necessary, the U9120-W4 may be wiped down with a mild soap and water mixture.
Although it is a sealed device designed to withstand submersion in water to 1 meter, do not
unnecessarily submerse this product in water.
Avoid storage of this product in direct sunlight or high temperature environments.

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FC CC C P Pa ar rt t 1 15 5 S St ta at te em me en nt t
RADIO AND TELEVISION INTERFEREN E
This equipment has been tested and found to comply with the limits for a lass B digital device,
pursuant to Part 15 of the F rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses and can
radiate radio frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful
interference to radio or television reception, which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and the receiver.
- onnect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- onsult the dealer or an experienced radio/TV technician for help.
You may also find helpful the following booklet, prepared by the F : "How to Identify
and Resolve Radio-TV Interference Problems." This booklet is available from the U.S.
Government Printing Office, Washington D. . 20402.
* In order to maintain compliance with F regulations shielded cables must be used with
this equipment. Operation with non-approved equipment or unshielded cables is likely to result
in interference to radio & television reception.
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In nd du us st tr ry y C Ca an na ad da a S St ta at te em me en nt t
This device complies with Industry anada license-exempt RSS standard(s). Operation is subject
to the following two conditions: (1) this device may not cause interference, and (2) this device
must accept any interference, including interference that may cause undesired operation of the
device.
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Un na au ut th ho or ri iz ze ed d C Ch ha an ng ge es s
hanges or modifications not expressly approved by David lark ompany, Inc. could void the
users’ authority to operate the equipment.
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FC CC C R Ra ad di ia at ti io on n E Ex xp po os su ur re e S St ta at te em me en nt t
This equipment complies with F radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with a minimum distance of 20
centimeters (8 inches) between the radiator (antenna) and your body. This transmitter must not
be co-located or operating in conjunction with any other antenna or transmitter.

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Us sa ag ge e R Re es st tr ri ic ct ti io on ns s
Due to the UP S frequencies used, this product is licensed for operation only in the United States
of America, anada, and those countries that have approved the DE T 6.0 Standard.
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Sp pe ec ci if fi ic ca at ti io on ns s
Refer to the U9120-W4 Data Sheet (19549P-49) for specifications.