David Clark 40992G-20 User manual

19605P-23 (07-20) 2020 DAVID CLARK COMPANY INCORPORATED
USER MANUAL
Digital Wireless Belt Station
U9110-BSW(EU)
(P/N: 40992G-20)

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Cautions and Warnings
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 DAMAGED. Upon unpacking your David Clark product,
inspect the contents for shipping damage. If damage is apparent,
immediately file a claim with the carrier and notify your David Clark
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 Clark Company.
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.

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Overview
The U9110-BSW(EU) (40992G-20) Digital Wireless Belt Station is a portable wireless
communication device that when used in conjunction with a U9120-W4(EU) (44002G-02) Digital
Wireless Gateway becomes part of a wireless intercom system. Up to four belt stations can be
connected to one gateway.
Figure 1: Overview of Belt Station
The U9110-BSW(EU) Digital Wireless Belt Station employs an adaptive SMART-VOX system which
does not require adjustment by the user. The system automatically monitors background noise
levels and detects voice.

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Linking
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 about 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. Ensure the U9110-BSW(EU) is not already connected (see Status Indication).
3. Simultaneously (within 1-2 sec) press and release the PTT button on the U9110-BSW(EU)
and the gateway to link with.
4. Amber LED’s will flash on both devices. A momentary red LED indicates a successful
close-link.
5. Upon successful link the U9110-BSW(EU) will attempt to establish a connection with the
gateway.
6. Upon successfully establishing connection the LED will flash green, a voice alert will be
heard (see Table 1), and user side-tone will be enabled (see Communication).
7. Link and connection are now complete.
Each belt station is able to be linked to only one gateway at a time. A gateway can have up to
four belt stations linked/connected at one time.
Tip:
Once linked, the devices will not need to be linked again unless they are purged (see
Purging).
Status Indications
The power button has a multi-color LED in the center which serves as a status indication for the
belt station. Table 1 below lists these states.
Table 1: LED Status Indication
LED Color
Blink Rate
Status
Red
Solid
Initializing/power up
Red
Solid
Close-link successful
Red
Any
Low battery (approx. 1 hr remaining)
Orange
Slow
Idle/Disconnected
Orange
Fast
Link/Connection in progress
Orange
Solid
PTT asserted
Green
Slow
Connected

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In addition to the LED, the belt station provides audio feedback for certain conditions as well.
Table 2 below lists these conditions.
Table 2: Alerts
“Connection Established”
“Connection Lost”
“Low Battery”
“Connection Deleted” (see Purging)
Triple Beep –Fringe Signal Area
“1,2,3 or 4” – Selection Indication (see Operation)
Operation
Power-up/power-down
To power up the U9110-BSW(EU) belt station, press and hold the POWER button for
approximately two seconds. The LED will turn red and then begin flashing orange. If the belt
station has been linked to a gateway and that gateway is in range, the belt station will
automatically connect within a few seconds.
To power down the U9110-BSW(EU), press and hold the POWER button for approximately two
seconds. The LED will turn red and then turn off. The belt station is now powered down.
Auto Shut-off
Additionally, the belt station will automatically power down if it is disconnected from its gateway
for more than 30 minutes.
Headset
In order for the U9110-BSW(EU) to be used, a David Clark H9100-series headset must be
connected. To connect the headset, align red keyways and push. Pull back gently on the
connector (behind the quick-release collar) to ensure it is properly locked. To disconnect, pull
back on the quick-release collar.
There are separate left and right volume controls on the headset.
It is also important to properly wear the headset and correctly position the microphone. For
optimum noise-cancelling performance, position the microphone 1/8” to 1/4” (3-6 mm) from
your lips.

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Figure 2: Positioning the Microphone
Communication
The user will hear his own voice (side-tone) only when the belt station is linked to a gateway,
assuming the microphone programming for intercom on the chosen selection is either hot-mic or
VOX; if the selection for mic function for intercom was programmed for PTT, the user will hear
side-tone when the PTT is depressed . Side-tone provides feedback for the user to know he is
connected. In general, if you can hear your own voice, the other users can hear you as well.
Range
The unimpeded line-of-sight range of a belt station and a gateway should be at least 500 ft
(150m). 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.
PTT
The PTT button allows the user to activate the headset's microphone momentarily while
depressed. The actual microphone transmit function (e.g., radio transmit or intercom) will
depend on the specific programming for the chosen selection on the belt station. For more
information see the Operation Digital Intercom manual (19549P-31). (see section on User
Interface to review programming options).
Selections
The U9110-BSW(EU) has the capability of switching between four “selections”. These selections
are defined within the Digital Intercom System graphical user interface and can be configured to
provide different communications paths between users and radios, as well as the behavior of
auxiliary audio devices connected to the system.

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To cycle though the four selections, briefly press and release the power button. A voice prompt
will indicate the selection. For more information on selections, please see the Digital Intercom
manual (19549P-31).
Low Battery
Under normal conditions, a belt station’s battery can be expected to last for approximately 24
hours of continual use (Note: if a Hear-through headset model is in use, this nominal use time
could be reduced by as much as 50%, depending on noise conditions and amplification level). A
voice prompt will indicate to the user that the battery is running low. Additionally, the Status LED
will turn red, at which point approximately 1 hour of operation would remain.
Purging
In some circumstances it may be desired to “purge” the U9110-BSW(EU) of its known gateway.
Typically purging is not necessary unless there are multiple gateways in the same vicinity and you
wish to link a belt station to a different gateway. A belt station can be linked to only one gateway
at a time.
Purge Procedure
1. Power down belt station (see Power-up/Power-down).
2. Press and hold PTT button. Do not release.
3. Power up the belt station (see Power-up/Power-down).
4. Release POWER button when red LED turns off.
5. Release PTT button.
6. A voice prompt will indicate that the connection has been deleted.
When this procedure is complete, the belt station will not automatically connect to a gateway
and must be linked again.
Battery Removal & Charging
The U9110-BSW(EU) uses a 3.7V Li-Polymer rechargeable battery. This battery is removed by
loosening the battery release screw (See Figure 1). These batteries are charged with the A99-
14CRG 4-bay battery charger (41034G-02).
When installing a battery, take care to align the battery properly and fully tighten the screw (see
Figure 3).

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Figure 3: Battery Insertion/Removal
Troubleshooting
Table 3: Troubleshooting
Problem
Solution
Belt Station will not turn on
Review Power-up/Power-down procedure
Ensure a fresh battery is installed
Cannot link a belt station
Review Registration procedure
Ensure units are within 1 to 3 ft. (0.3 to 0.9m) of
each other while linking
No sidetone
Not connected to a Gateway
Low receive audio
Adjust left/right volume knobs on headset
No audio /intermittent audio
Check headset connection to belt station
Replacement Parts
Battery (P/N: 40688G-90)
Protective skin, black (A99-01SKN, P/N: 40796G-02)

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Care and Maintenance
The U9110-BSW(EU) is not user serviceable. Do not attempt to open the enclosure. If this
product requires service, please contact the David Clark Co. Inc. Customer Service department:
Phone: [phone]
E-Mail: [e-mail]
By Mail: Customer Service
David Clark Company
360 Franklin Street
Worcester, MA 01604
When necessary, the U9110-BSW(EU) may be wiped down with a mild soap and water mixture.
Although it is designed as a water-tight device, do not unnecessarily submerse this product in
water.
Avoid storage of this product in direct sunlight or high temperature environments.
Specifications
Frequency Range
1880 MHz - 1900 MHz (EU)
Average RF Power Output
10 mW (250mW peak) (EU)
Range
500 ft (150m) line-of-sight (nominal)
Battery Life
24 hrs continuous use (nominal)
Operating Temperature
-14°F to 113°F (-10°C to +45°C)
Storage Temperature
-4°F to 140°F (-20°C to +60°C)
Power Requirements
3.7V @ 100mA nominal
Battery Type
3.7V 2000mAh Li-Polymer

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Unauthorized Changes
Changes or modifications not expressly approved by David Clark Company, Inc. could void the
users’ authority to operate the equipment.
Usage Restrictions
Due to the UPCS frequencies used, this product is licensed for operation only in the European
Union Countries, and those countries that have approved the DECT EU Standard.

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SAR Statement
Radio wave exposure and Specific Absorption Rate (SAR) information
This product has been designed to comply with applicable safety requirements for exposure to
radio waves. These requirements are based on scientific guidelines that include safety margins
designed to assure the safety of all persons, regardless of age and health. The radio wave
exposure guidelines employ a unit of measurement known as the Specific Absorption Rate, or
SAR. Tests for SAR are conducted using standardized methods with the product transmitting at its
highest certified power level in all used frequency bands. The product is designed to meet the
relevant guidelines for exposure to radio waves.
SAR data information for residents in countries that have adopted the SAR limit recommended by
the International Commission of Non-Ionizing Radiation Protection (ICNIRP), which is 0.08 W/kg
averaged over the whole body or 2.00 W/kg averaged over ten (10) gram of tissue (for example
European Union, Japan, Brazil and New Zealand):
The highest SAR value for this product when tested for use on the body is 0.216W/kg (averaged
over 10g).
This product is protected by one or more of the following US patents:
10,237,415 10,389,884 10,397,408 10,560,825 10,701,211 10,701,212