Linear SST00049A User Manual

DESCRIPTION

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The ST-23 “Money Sentry” is a special
purpose digitally coded stationary supervised
radio transmitter designed to fit inside a cash
drawer. A paper money “bait” bill placed under
the money clip keeps the ST-23 turned off and
armed (see Figure 1). Removing the money
activates a switch, causing the ST-23 to
transmit a coded radio

alarm

signal to its
associated receiver. This transmitter can be
programmed to activate any of Linear’s
supervised digital receivers that are tuned to
the same frequency. The ST-23 is typically
used in wireless/hardwire security systems
and is powered by two, self-contained,
DURACELL Type DL 2032 3-volt lithium
batteries (included).

MONEY

STORAGE
INSERT

TEST
BUTTON

Figure 1. ST-23 Money Clip Transmitter

LED

CLIP

SUPERVISED FEATURES

The ST-23 continuously monitors its battery
voltage. If the voltage is tested low, the
transmitter will send a

low battery

transmission to the receiver. Because the
radio signal from the transmitter may not
reach the receiver when the cash drawer is
closed, a motion detector is incorporated
into the transmitter to determine the drawer
position. Low battery transmissions occur
every hour

and

up to once every five minutes

whenever the drawer is opened. This

transmitter does not report hourly status
transmissions.

A recessed test button, located on the face
of the ST-23, can be used to test the
transmitter’s operation. Pressing the test
button causes the transmitter to send a

(not

alarm

) report. The unit’s red LED will light

test

during the test. If the red LED blinks as the
test button is pressed, the transmitter’s
batteries are low and should be replaced. The

red LED does not light during

alarm

transmissions.

✶

CAUTION! Removal of storage insert or
bait bill for long periods of time will
cause degradation of battery life.

OPERATION

The ST-23 transmits a 3-second

alarm

signal when the “bait” money is removed
from the retaining clip. An additional 4

alarm

3-second

signals will be sent during
the 1-minute period following the initial
alarm. The transmitter will send a 2-second

restore

transmission when the bait money is

replaced.

CODE SWITCH LOCATION

The digital coding switches are attached to the
circuit board inside the case. To access the
switches, remove the battery door as shown in
Figure 2.

SYSTEM

CODE

SWITCH

CHANNEL

CODE

SWITCH

1

2

3

4

5

1

6

2

7

3

8

4

5

6

7

8

TWO DURACELL

TYPE DL2032

3 VOLT BATTERIES

(+ SIDES UP)

Figure 2. Digital Coding Switch Location

CODE SETTING

✶

CAUTION! All transmitters and receivers
must be re-coded by installer prior to
operation. DO NOT USE THE FACTORY
SET CODE!

System Code

Set the SYSTEM switch to a random code or,
if the ST-23 is going to be used in an existing
system, set the SYSTEM code to match the
other transmitters used in the system.

Among the 256 possible system codes, four
codes are considered invalid, and should not
be used. They are: all keys ON, all keys OFF,
and keys set alternating ON/OFF or OFF/ON
combinations.

Use a pointed object (other than a pencil or
pen) to set the keys numbered 1 through 8.
The ON position is when the top of the switch
is down, facing the
numbers. The OFF
position is when the
top of the switch is up
and the bottom is
down, away from the
numbers.

In the example
shown in Figure 3,
keys 1,4,6 and 8 are
ON; keys 2,3,5 and 7
are OFF.

Figure 3. Example

Coding Switch

Channel Code

Set the CHANNEL switch to the proper code
as defined in the Installation Instructions for the
receiver being used. Different model

receivers require unique channel coding.

Some receivers may require setting of the
transmitter’s CHANNEL switches or the
receiver’s OPTION switches to configure the
receiver for the ST-23 transmitter. The
switches should be set for:

➪

ACTIVE TRANSMITTER (Alarm
transmissions cause alarms)

➪

SILENT ALARM (Receiver triggers
communicator with no audible alarm)

➪

STATUS REPORT DISABLE (Receiver
does not require hourly status reports from
the transmitter)

The ST-23 is currently compatible with
Linear’s:

➪

Silent Signal Console

➪

SS-32T

➪

SSR-32

INSTALLATION

To install the transmitter, proceed as follows:
STEP 1: Remove the paper storage insert

and replace it with a “bait” bill.

✶

IMPORTANT! Do not place more than
one “bait” bill under the money clip.

STEP 2: Remove the battery protection

strip, verify that the system and
channel codes are set correctly,
then replace the battery door.

✶

CAUTION! The storage insert or bait bill
must always be installed prior to closing
the battery door or an alarm
transmission will occur.

STEP 3: Select a cash drawer slot for the

transmitter.

STEP 4: Remove the protective backing

from one side of the supplied
Velcro fastener and stick it in the
center of the cash drawer slot.

STEP 5: Remove the other protective

backing strip and stick the ST-23
transmitter to the Velcro fastener.

STEP 6: Place the receiver into a “enter” or

“program” mode.

STEP 7: Press the transmitter’s test button

to enter the transmitter into the
receiver’s memory. Verify that the
signal was properly received.

CHECKOUT AND TEST

After installation, the transmitter and receiver
should be checked out as a system.

Place the receiver in a “test” mode or disconnect
the communicator’s phone line. Activate the
transmitter by removing the “bait” bill. Receiver
activation indicates that the transmitter is
operating properly, and that the transmitter’s
digital code is correctly matched to the code set
in the receiver. Replace the “bait” bill and verify
that the

restore

signal was received.

Pressing the test button with the “bait” bill installed
causes the LED to light (or blink if the batteries
are low) and a

✶

NOTE: The test button is disabled for

test

transmission to be sent.

approximately 90-seconds after the bait
bill is removed.

CAUSES FOR NON-OPERATION

If the transmitter fails to activate the receiver,
first check the coding switches to see that the
switch keys in the transmitter and the receiver
are correctly set. Next, check the batteries and
replace them if they’re weak.

If the code is set correctly, the battery is good,
and the LED lights when the test button is
pressed but the receiver doesn’t activate,
check for hidden metal obstacles or large
metal appliances between the transmitter and
receiver that may be blocking the radio signal.
Locate the receiver at least 6 feet from
transmitter. Re-location of the transmitter or
receiver may be necessary.

✶

CAUTION: The manufacturer strongly
recommends that you test security
equipment frequently. From the time of
installation, it is absolutely necessary to
test the system at least once a week.
Although the two 3-volt batteries should
last about two years, it is good practice
to change the batteries whenever
pushing the test button or replacing the
“bait” bill causes the transmitter’s LED
to blink.

SPECIFICATIONS

Coding Format

Linear S1: 21 bit A1D PPM: 256 system & 256 channel

Power Requirements

Operational Voltage Range: 6 VDC nominal

Temperature Requirements

Dimensions

Transmit Current

Consumption: 8 mA nominal

Low Battery Mode: 15 µA nominal

Standby Current

Consumption: 4 µA nominal

Low Battery Operational

Operating Temperature: 32° to 131° F (0° to 55° C)

Storage Temperature: -40° to 167° F (-40° to 75° C)

Battery Life: 2 year minimum

codes possible

Life: 1 week minimum

Width: 2.4" (6.1 cm)

Length: 4.5" (11.4 cm)

Height: 0.8" (2.03 cm)

LINEAR LIMITED WARRANTY

This Linear product is warranted against defects in material and
workmanship for twelve (12) months. The Warranty Expiration Date is
labeled on the product.

who buy direct from Linear or through Linear’s normal

customers

distribution channels.

consumers.

nature of the dealer’s warranty, if any.

liabilities on the part of Linear Corporation for consequential
damages arising out of or in connection with use or performance of
this product or other indirect damages with respect to loss of
property, revenue, or profit, or cost of removal, installation, or
reinstallation.

merchantability and implied warranties for fitn ess, are valid only until
Warranty Expiration Date as labeled on the product.

Corporation Warranty is in lieu of all other warranties express or
implied.

For warranty service on Linear equipment return product, at sender’s
expense to:

Linear Corporation
2350 Camino Vida Roble, Ste A
Carlsbad, CA 92009
Attn: Repairs Department

Consumers should inquire from their selling dealer as to the

This warranty extends only t o wholesale

Linear does not warrant this product to

There are no obligations or

All implied warranties, including implied warranties for

This Linear

IMPORTANT !!!

Linear radio controls provide a reliable communications link and fill an
important need in portable wireless signalli ng. However, there are
some limitations which must be observed.

➪

For U.S. installations only: The radios are required to comply with
FCC Rules and Regulations as Part 15 devices. As s uch, they
have limited transmitter power and therefore limited range.

➪

Receivers may be blocked by radio signals that occur on or near
their operating frequencies, regardless of code settings.

➪

A receiver cannot respond to more than one transmitted signal at
a time.

➪

Infrequently used radio links should be tested regularly to protect
against undetected interference or fault.

➪

A general knowledge of radio and its vagar ies shoul d be gained
prior to acting as a wholesale distributor or dealer, and these facts
should be communicated to the ultimate users.

Copyright © 1991 Linear Corporation 202703 C

ST-23

“Money Sentry”
Supervised Cash
Drawer Transmitter

Code Setting and

Installation Instructions

A NORTEK COMPANY

2055 Corte Del Nogal

Carlsbad, CA 92009

[phone] • [phone]

CA [phone] • FAX [phone]

Customer/Technical Service: [phone]