GBA ST1C User manual

GBA Global Bill Acceptors GBA ST1C Operation Manual
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GBA ST1C Operations manual V1_4
GBA ST1C
Operation Manual
This document is the c
opyright of Astrosys International Ltd. and may not be reproduced in total or in part
by any means, electronic or otherwise, without the prior written consent of Astrosys International Ltd.

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Contents
1.0 INTR DUCTI N .............................................................................................................................. 3
2.0 PR DUCT INF RMATI N ............................................................................................................... 4
2.1 General Specifications ................................................................................................................ 4
2.2 Product Architecture .................................................................................................................. 5
2.2 Product Architecture .................................................................................................................. 5
3.0 INTERFACE PR T C LS ................................................................................................................. 9
3.1 NAMA MDB ................................................................................................................................ 9
3.2 CCTALK
®
...................................................................................................................................... 9
3.3 USB ............................................................................................................................................. 9
4.0 S FTWARE C NFIGURATI N....................................................................................................... 10
4.1 n-board Push Button ............................................................................................................. 10
4.2 PC Based GBA Tools ................................................................................................................. 13
4.3 USB Mass Storage Device ......................................................................................................... 13
4.4 Software Configuration ptions: ............................................................................................. 16
4.5 Illuminated Note Guide Patterns ............................................................................................. 17
5.0 ELECTRICAL INTERFACE SPECIFICATI N ...................................................................................... 18
5.1 Power Requirements ............................................................................................................... 18
5.2 Signal Interface......................................................................................................................... 18
5.3 Low Power Mode ..................................................................................................................... 19
6.0 ELECTRICAL C NNECTI NS .......................................................................................................... 21
7.0 MAINTENANCE ............................................................................................................................. 23
7.1 Cleaning the Validator Note Path ............................................................................................ 23
7.2 Clearing a Note Jam ................................................................................................................. 24
8.0 DIAGN STICS & TR UBLESH TING .......................................................................................... 25
8.1 Diagnostics ............................................................................................................................... 25
8.2 Troubleshooting ....................................................................................................................... 27
8.3 Dimensional Drawings ............................................................................................................. 28
Revision History.............................................................................................................................. 30
DISCLAIMER .................................................................................................................................... 30
REGI NAL FFICES ......................................................................................................................... 30

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1.0 INTRODUCTION
This manual describes the operation and maintenance of the GBA ST1C integrated bill validator
and stacker. It is intended to assist the user in the set-up, installation and operation of the
product.
If you have any questions about this or any other Astrosys products then please visit our web sites
at www.globalbillacceptors.com and www.microcoin.com, or contact your regional sales office for
assistance.
The GBA ST1C has been specifically designed for use in Amusement and Vending applications;
however it can also be used in all applications previously served by the GBA vertical stacker range,
including Parking and Internet Kiosks. The following features are also offered:
•Up or Down entry stacking configuration
•“Sense Technology” bill discrimination
•Up to 32 different bills accepted with 4 way insertion
•Accepts bill sizes from 62 to 70mm wide, 120 to 160mm long
•Single Cassette bill capacity option (300)
•Illuminated Bill Entry Bezel
•Tamper-evident, lockable cassette options
•Integrated optical anti-string protection
•Low Power Mode
•Bar code reading option
•USB connectivity and programming option
•Supports multiple interfaces
•Single note escrow
•n board Individual note enable / disable
•Automatic sensor calibration
•n board tri-colour diagnostic LED
•Easy access to note path for cleaning and servicing
•User Support Tools
•CE, UL, C-Tick and R HS compliant
•Manufactured to IS 9001 standards
Please note that the words “bill” and “note” are used interchangeably in this document to imply a
single piece of paper currency.

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2.0 PRODUCT INFORMATION
2.1 General Specifications
Bill Insertion: Up to 32 bill denominations with 4 way insertion
Bill Dimensions: 62 to 70mm wide; 120 to 160 mm long
Bill Acceptance Rate: Greater than 95%
Cycle Time for Validation and Stack: Typically less than 3 seconds
Interface Protocols Supported: Pulse, Parallel, ccTalk
®
(plain & encrypted), bi-
direction serial (“RS232”), NAMA MDB, SSP, VCCS
Power Supply: 12Vdc +/-10% (see section 5.1 Power Requirements
for details of optional power regulator module)
Power Consumption Refer to section 5.1 Power Requirements
Environmental Range
( perating Temp): 0° to 55°C
( perating Hum): Up to 90% R.H., non-condensing
(Storage Temp): -10° to 65°C

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2.2 Product Architecture
2.2 Image of product assembly
The GBA ST1C product consists of Main Chassis (1) which supports the Top Sensor Assembly (not
shown) and Bottom Sensor Assembly (2). Inter-changeable accessories are:
(3) Bill Cassette (300 Bills storage)
(4) Faceplate / External Note Guides
-For Faceplate/Note Guide ptions refer to section 2.2.4 Note Guide & Faceplate
3. Bill Cassette
1. Main Chassis
4. Faceplate /
Note Guide
2. Bottom
Sensor
Assembly

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2.2.1 Cassette Fitting / Removal
To fit a note cassette to the GBA ST1C validator, ensure that the cassette lid is level with purple
cassette clip of the GBA ST1C body. Line up the four cassette locating studs with the four location
slots in the channel and push the cassette firmly towards the validator body. The studs will locate
into the joints. To ensure that the cassette latch has successfully re-engaged, press down on the
cassette lid. Remove the cassette by sliding the cassette clip forwards (away from the cassette)
and lifting the cassette away from the GBA ST1C unit.
2.2.1 Cassette removal
2.2.2 Cassette
Currently available cassette option holds 300 notes. The cassette has the option to be locked for
security using two cam locks. To access the bills squeeze two tabs as shown below.
2.2.2 Cassette 300 (fitted as standard) 2.2.2 Image of Cassette open
Squeeze two tabs and pull
back to open the cassette
and remove stacked bills

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2.2.3 Bottom Sensor Assembly
2.3.1 Image of Bottom Sensor Assembly
2.2.4 Note Guide & Faceplate Options
Note guides are available in two sizes:
1. USD – suitable for note widths up to 67mm
2. CAN – suitable for note widths up to 70mm
There is a different faceplate for each of the note guide widths, and both styles of faceplate are
available in either up or down stacking configuration.
2.2.4.1 Up stacker Faceplate 2.2.4.2 Down stacker Faceplate
To limit the impact of machine abuse is anticipated, the GBA ST1C unit is secured to the faceplate
using four screws. The validator can be mounted either with the faceplate showing at the front of
the host machine or with the majority of the faceplate concealed, and just the illuminated note
guide visible.
Access Latch
Tension Rollers

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2.2.5 Interface Cable Assembly
The GBA ST1C is fitted with a 20 pin interface connector. All interfaces, with the exception of
NAMA MDB, utilise this connector for communication to a host machine. For further details
relating to interface and connection information, please refer to section 5.0 ELECTRICAL
INTERFACE SPECIFICATI N
2.2.6 Bar-coded Coupon Sensor
The ST1C can be fitted with a sensor for detecting and reading the barcodes on a printed coupon.
The sensor uses green light, so it can readily read thermally printed coupons. The sensor can only
scan one face of the coupon, so the coupons must be inserted with the barcode facing upwards
for the up-stacker arrangement, and facing downwards for the down-stacker.
The bar-coded coupons should be a similar size to the wider notes that the validator handles.
At present, only the ccTalk and GBA BSCP protocols provide the host with commands to read back
the content of the barcode as a text string.
Further details on the barcode reading function, including bar code printing sizes and the codes
read, are available from your regional Sales ffice.

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3.0 INTERFACE PROTOCOLS
The GBA ST1C can communicate with a host (machine) via one of several base interface protocols.
These protocols are;
•NAMA MDB
•Pulse
•Parallel
•ccTalk
®
•Bi-directional serial protocol (“RS232”)
•SSP
•JVI/VCCS
Variants to some of these protocols are also available; please contact your regional office for
further details.
With the exception of MDB the GBA ST1C will be connected to the host machine using a cable
assembly terminated with a 20-way connector, as denoted in section 6.0 ELECTRICAL
C NNECTI NS.
For NAMA MDB, the interface cable terminates with a 6-way connector.
3.1 NAMA MDB
If the GBA ST1C is used in an MDB interface application, then it must be fitted with an optional 20
to 42 Volt power regulator and with opto-isolators on the communication lines, as required by the
NAMA MDB specification. This option must be specified when ordering the ST1C. An adaptor cable
is required to connect to a standard NAMA 6 pin connector.
Please contact Technical Support for details.
3.2 CCTALK
®
If the GBA ST1C is used in a ccTalk® interface application, an alternative 20 pin harness is available
if the host controller uses a single data line for communications both to and from the validator.
Part Number: ASY-W-10265.
Please contact Technical Support for details.
For further details relating to the operation of specific interfaces please refer to the Interface
Description Manual.
3.3 USB
The GBA ST1C can be offered with an optional USB interface. The USB mini-AB socket is fitted to
the side of the unit, next to the 20-way connector power plug.
The USB interface can be used to connect directly to a USB PC host, where it then acts as a USB /
serial comms port, and can be used to transmit the BSPC RS232, SSP and ccTalk protocols. The
GBA USB Driver will need to be installed; please contact your regional office for a copy, and specify
which version of Windows you are using.

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4.0 SOFTWARE CONFIGURATION
4.0 - Image illustrating rear of Bottom Sensor Assembly
The GBA ST1C can be configured using either the on-board push button or via a Windows based PC
package (GBA Talk) or connecting a USB memory device to the USB port.
4.1 On-board Push Button
The on-board push button is located on the side of the main chassis – see figure 4.0.
This push button will allow access to on-board programming modes including note enable (1
press), note disable (2 presses) and Primary Calibration / Configuration (3 presses). A single long
press of more than 2 seconds will cancel the programming mode. In the note enable and disable
modes a sample note must then be inserted and scanned. If the operation is successful the
validator will return to normal operation mode. If it is unsuccessful, it will remain in the program
mode and the illuminated note guide will continue to flash until the push button is held for more
than 2 seconds.
If the push button is held for more than 5 seconds an error is reported (Status ED solid red).
4.1.1 Configuration Procedure – Enable Note
Procedure:
1. Push button x 1, the Status LED will flash green rapidly.
2. Insert a sample note of the specific denomination required to be enabled.
3. The GBA ST1C will scan the note in and then return it.
4. Enable complete. The Status LED will return to solid green.
Status LED
Push Button
MDB Connector
20 Pin Connector
USB Port

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4.1.2 Configuration Procedure – Disable Note
Procedure:
1. Push button x 2, the Status LED will flash red rapidly.
2. Insert a sample note of the specific denomination required to be disabled.
3. The GBA ST1C will scan the note in and then return it.
4. Disable complete. The Status LED will return to solid green.
4.1.3 Configuration Procedure – Programming Card
Equipment Required;
Program Card. (PC software is available to print these cards. Please consult your local sales office)
Procedure;
1. Push button x 3, the Status LED will flash orange rapidly.
2. Insert the Program Card into the reader.
3. The GBA ST1C will scan the Program Card in and then return it.
4. Configuration is complete.
5. If programming has not been successful, the Status LED will repeatedly flash a 4 colour
error code until the push button is pressed to cancel.
6. If successful, the Status LED will return to steady green or orange.
Note: Please ensure the programming card has been printed on a high quality printer with good
solid black lines on the card.
4.1.4 Configuration Procedure – Re-Calibration
Although calibration of the GBA ST1C is not a necessity it is recommended periodically for
preventative maintenance, and also after any change to the software configuration of the unit.
Equipment Required;
Calibration Papers:
Synthetic White Paper - 2 chamfered corners, Part Number ASY-W-10268 for units with US
or Canadian note guides, Part Number ASY-W-10311 for units with wider note guides.
Black calibration card
Procedure;
1. Push button x 3, Status LED will rapidly flash orange.
2. Insert the white calibration paper into the validator. It should be presented in the centre of
the note path and square to the direction of travel.
3. The ST1C unit will draw-in the paper all the way into the cassette; hold it momentarily
before returning it in several short steps.
4. Remove the calibration paper from the note entry point.
5. Insert the Black calibration card.
6. The ST1C unit will draw-in the card and return it immediately in one smooth action
7. Calibration is complete
8. If calibration has not been successful, the Status LED will repeatedly flash a 4 colour error
code until the push button is pressed to cancel.
9. If successful, the Status LED will return to steady green/orange.
Note: Please ensure the ST1C calibration paper has 2 chamfered corners.

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4.1.5 Calibration Error Codes:
Status / Fault Flash 1 Flash 2 Flash 3 Flash 4 Comments
Calibration aborted Red Red Red Red
Eeprom fault Red Red Green Green
Sensor Errors
ransmissive sensors If there is a problem, try cleaning
the lenses.
Wide Left Red Red Green Red
Wide Right Red Red Red Green
Middle Left Green Green Green Red
Middle Right Green Green Red Green
Narrow Left Green Green Red Red
Narrow Right Green Red Green Green
Reflective Sensors If there is a problem, try cleaning
the lenses.
Upper Right Green Red Green Red
Upper Left Green Red Red Green
Lower Right Green Red Red Red
Lower Left Red Green Green Green
Coupon Red Green Red Red
Other sensors
ptical Anti-String Gate Red Green Red Green
Front Left Sensor Red Green Green range
Front Right Sensor Red Green Red range
Other Errors
Length error Red Red Green range
Paper feed fault Red Red range Red Try reinserting the paper carefully
Paper length too short or
tacho fault
Red Green range Red
Calibration paper skewed Red range Green range Paper was inserted at an angle
Calibration paper dirty Red range Red range r crinkled. Use a new piece.
Program Cards
Error on program card Red Red Red range Try reprinting the card
Program card not
supported
Red range range Green The program card function is not
supported by the ST1

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4.2 PC Based GBA Tools
The GBA ST1C can also be configured using PC based software, GBA Talk or GBA Service. This
software also provides calibration and diagnostic functions.
Note: for full instructions on using GBA Talk, refer to the utility’s help file.
4.2.1 Configuration Procedure – GBA Talk PC Software
Equipment Required;
GBA Talk Kit, consisting of PC software, USB/serial dongle or diagnostic harness and 20 pin
harness.
Note: the 20 pin harness must contain a 4 pin socket connected to pins 18, 19 and 20.
Procedure;
1. If the kit includes a black cable terminated in a 9-pin D connector, then plug this into the
DB9 connector of the PC, and the 4 pin connector into the 4 pin plug of the 20 pin harness.
2. Alternatively, if the kit includes a USB to serial converter, such as the VAL364 USB module.
Please contact Technical Support for details.
3. With GBA Talk open, click the “Upload All” button to view the current configuration of the
validator.
4. Make the required changes by using the form controls.
5. To complete the procedure, carry out the calibration process by selecting “Calibrate” from
the Calibration window.
4.3 USB Mass Storage Device
The GBA ST1C validator can be supplied with an optional USB interface, which can be used to
reprogram a unit from a USB Mass Storage Device (memory stick). Those validators with a USB
interface are fitted with a mini-AB receptacle.
4.3.1 Connecting a USB Mass Storage Device
Most USB memory devices are fitted with a standard-A plug, which fits the standard sockets on a
PC. To connect the memory device to a validator requires a suitable adaptor cable. ne solution is
to use a cable with a USB standard-A plug at one end and mini-B plug at the other (these are
widely used for connecting PC’s to music players and cameras) and a USB standard-A female to
female connector (also widely available).
Power up the validator and then plug the memory device firmly into the connector.
The memory device should be a conventional USB memory device (i.e. with no novelty features),
formatted by Windows in a FAT format, not NTFS. To find out what format has been used, in
Windows Explorer select the device, right click and select “Properties”. n the “General” tab, the
type should be described as “Removable Device” and file system as “FAT”. Devices with smaller
capacities tend to work more reliably. Also the files must not be encrypted in any way.
4.3.2 File location on the memory device
The validator files should be stored in the root directory of the memory stick. This will appear as
“F:\” or similar letter in “My Computer” on a Windows™ PC. The files should not be put in any

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folder, as the validator will not find them. lder and smaller devices have a limit on how many
files can be stored in the root directory (typically 512).
In the root directory you can store one firmware file, one dataset file and one configuration file
that matches the country code of the dataset. A Setup USB wizard tool is available within the GBA
Talk and GBA Service utilities to help you with this. It is not necessary to have all of these files. You
can, for instance, just have a new configuration file on the device and just that will be loaded.
4.3.3 Sequence of events
1. When the validator detects that a USB device is connected, it will attempt to identify it. If it
can successfully identify it as a memory device, it will then check it, otherwise an error is
given.
2. While the validator is reading the memory device, the Status LED will flash orange/green
alternately. The speed of flashing will reflect the speed at which the individual device
communicates.
3. The validator then searches the root directory for a firmware file (this has the suffix “phy”).
If it finds one, it then checks the firmware version number. If the version number is
different from the current firmware (whether higher or lower) it will load that firmware
and then restart. nce it has restarted it will check the memory device for other files.
4. If more than one firmware file is found, the validator stops reading the memory device and
goes into an error state.
5. If it finds no firmware files, it proceeds directly to the next stage.
6. It next checks for a dataset file (suffix “stx”) and loads that. The dataset file name should
be in the form “ST2 06 N0419100.stx”. Again, if there is more than one dataset file, the
validator will stop reading and go into an error state. Also, if the validator determines that
the dataset format is not compatible with the current firmware version, it will not
download the dataset.
7. nce the dataset is loaded, the validator then looks for a corresponding configuration file.
The file name will be in the form “06_101_M00.xml”. The first 2 characters are the
currency code and must match the second block of characters in the dataset filename.
8. Again, if the validator finds more than one configuration file for that currency, it will enter
an error state.
9. Note that dataset and configuration files are issued by AstroSystems with the correct
naming convention names.
10. nce the validator has finished, it will repeatedly flash a 4 colour code on the Status LED at
the back, indicating either success or failure, until the memory device is disconnected. The
success/error codes are shown below.

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4.3.4 USB Download Error codes displayed by the diagnostic LED:
Status / Fault Flash 1 Flash 2 Flash 3 Flash 4
Success range Green Green Green
On board Faults
Fault with validator USB interface range Red Red range
Bus Error (Slave and Host pins high) range Red Red Red
USB Download Disabled range Red Red Green
Device Faults
USB Device not recognised range range Red Green
Cannot read MST Boot Sector range range Red range
Error reading MST range range Red Red
File faults
Too many dataset files found range range range Green
Error in dataset file range range range range
Too many configuration files found range range range Red
Error in configuration file range range Green Green
Too many firmware files found range range Green range
Error in firmware file range range Green Red
Firmware does not support this
dataset range Red range range

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4.4 Software Configuration Options:
All of the software options below can be set using either the GBA Talk PC software, a configuration
file on a USB Mass Storage Device or Program Card facility, as mentioned above. Two kinds of
program card are available. Firstly a card to set all options (all options must be specified) and
secondly individual, specific option cards that will set only key options such as security level,
ccTalk
®
Encryption Key or Note enable / disable.
Interface:
The GBA ST1C can be set for use with the following interfaces:
(1) Pulse/NISR Serial Protocol
(2) Parallel
(3) BSCP (Bi-directional Serial Communications Protocol - RS232)
(4) MDB
(5) ccTalk
®
Non Encrypted
(6) ccTalk
®
Encrypted
3
(7) Parallel XT
(8) Parallel Binary
(9) Smiley Secure Protocol (SSP)
(10) JVI/VCCS
Definitions of the above can be found in the Interface Description Manuals.
cc alk
®
Encryption Key Reset:
Should a validator require replacing in a ccTalk
®
application, the Encryption key will require
resetting to the default in both the host machine and the note validator. This is achieved, on the
note validator, by use of the ccTalk
®
Encryption Key Reset Programming Card using the procedure
described above, in “Configuration Procedure – Programming Card”. For resetting the host
machine please refer to the machine user guide.
Escrow ime out period (Parallel interfaces only):
This option enables the Escrow time out period to be set in 1-second intervals between 1 and 255
seconds. Please Note: The standard escrow time is 26 seconds. Adjust with care! The host
machine must be designed to work with any other time selected. Please contact Technical support
for more details.
Low Power Mode: In this mode the quiescent current drawn by the unit is reduced to 30 µA by
remaining in hibernation until a note is presented. See section “5.3 Low Power Mode” for further
details.

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How to handle a note that is found in the validator at power up: If the ST1C validator detects that
there is a note in the note path when it powers up, by default it will return the note to the user.
However, for some applications this behaviour is undesirable as the user is awarded a credit
before a note is stacked. The validator can be configured to stack the note instead.
Depending on the interface selected, the validator will give one of the following messages:
Interface Message to host
Pulse and Parallel No message
BSCP (RS232) Note type zero stacked (zero = unknown denomination)
MDB Note rejected
ccTalk Unknown Bill Type Stacked (event code 0,21)
SSP Unknown Note Stacked At Reset (event code 0xE2)
JVI/VCCS No message
4.5 Illuminated Note Guide Patterns
The illuminated note guide can be configured to flash different patterns according to the validator
state:
S 1C State Pattern
ut of Service - fault Note Guide off
Not accepting notes at the request of the
host controller.
Note Guide off
In service, waiting for a note Note Guide on
In service, handling a note Flashes the top and bottom alternately

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5.0 ELECTRICAL INTERFACE SPECIFICATION
5.1 Power Requirements
5.1.1 Power Supply – 20-pin connector
Voltage: 12Volts DC +/- 10% Regulated
5.1.2 Power Supply – Optional MDB 6-pin Connector and Power Regulator
Voltage: 20 to 50 Volts DC
5.1.3 Power Consumption
Quiescent: 200mA
Validating: 800mA
Stacking: 700mA
Stalled: 1400mA
5.2 Signal Interface
5.2.1 20-pin connector
pen Collector outputs:
Maximum pen Voltage 40V
Maximum Sink Current 50mA @ 12VDC
Maximum utput Low Voltage 0.4VDC
Minimum utput High Voltage 2.4VDC
Digital inputs
Input low level voltage 0…. 1V
Input high level voltage 3…..12V (typically 3… 5V)
Input pull up to 5V 33K Ω
5.2.2 Optional MDB 6-pin Connector
This connector provides opto-isolated data communication lines, in accordance with the NAMA
MDB specification.
Maximum output low voltage: 1V @ 20mA
Maximum input idle level current: 0.5mA
Minimum input active level current: 5mA
Pull-up resistor on TX none
Limiting resistor on RX internal, 560Ω
5.2.3 USB Port
The ST1C is compliant as a USB 2.0 full speed host or device and is fitted with a mini-AB socket.

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5.3 Low Power Mode
This mode is designed so that the ST1C unit remains in hibernation, drawing very low power, until
a note is presented at the front. At this point it will wake up immediately and process the note. If
no other note is presented within 2 seconds, the unit will return to hibernation.
While asleep, the illuminated note guide will “blink” briefly every few seconds to show that the
validator is in service. If the ST1C had a fault before going into hibernation (e.g. a note jam) then
the note guide remain dark.
The “Use Low Power Mode” option must be set via GBA Talk or Service tools.
In this mode the quiescent current drawn by the unit is reduced to 10 µA by remaining in
hibernation until a note is presented.
5.3.1 Electrical Connections:
The 12 Volts dc power should only be connected to pin 17 of the 20 way connector – pin 16 must
not be connected to the supply. When the ST1C wakes up, the 12 Volt bus is energised. Pin 16 can
then be used either to provide power to another device or to wake up the host controller. The
maximum supply current is 200mA.
See section 6.0 ELECTRICAL CONNECTIONS .
5.3.2 Interfaces Supported in Low Power Mode
Low Power Mode is intended to be used with either Pulse Mode or Parallel XT Mode. (Unlike
standard Parallel Mode, Parallel XT mode uses the BUSY line to signal the host when it is
activated.)
The ST1C can also be controlled using the ccTalk serial protocol, although the implementation will
vary from the standard process.
5.3.3 Operational Features:
1. During the wake up process, the ST1C will pull the BUSY line low (pin 3), keeping it active
during the entire transaction. Therefore, the BUSY line can be monitored and used to wake
up the host if this is also put to sleep to save power.
2. The ST1C will return to sleep mode 2 seconds after all activity has ceased. However it will
wake up again on any new note presentation.
3. Therefore the host should latch its power supply on wake up to allow the machine to
complete the customer transaction rather than rely on ST1C to keep it awake.
4. Should the host need to wake up the ST1C at any point, this can be achieved by pulling pin
18 low and keeping it low as long as ST1C is required. This feature can be used to run tests
on the ST1C or download an updated note dataset.
5. If the host is using the ccTalk serial interface then:
a. It does not need to enable the ST1C or the notes when it wakes up. The ST1C will
scan the note immediately, and hold it in escrow. If the host fails to begin polling
the ST1C within 7 seconds after the wake up signal is issued then the note will be
rejected.
b. The Inhibit Line must be connected to ground, or pulled low by the host, before the
note is scanned into the ST1C. This allows the host to signal if it wishes the ST1C to
even start scanning.

GBA Global Bill Acceptors GBA ST1C Operation Manual
Page 20 of 30 Astrosys International Ltd
GBA ST1C Operations manual V1_4
6. If a note is returned to the customer, then the ST1C will wait up to 3 seconds for the user
to remove it, before powering down. If the note has not been removed, it will send a pulse
on the ALARM line, and then go into hibernation.