Elo TouchSystems IntelliTouch SecureTouch Signal Name DB-9 P2 pin Sourced by Signal Function

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Table B.4 Serial Connector, P2, signal names and functions

Signal Name	DB-9	P2 pin	Sourced by	Signal Function

-DCD	1	1	ctrl	“carrier detect”, handshake=’0’ when controller power
				on
-DSR	6	2	ctrl	“data set ready”, handshake=’0’ when controller power
				on
RXD	2	3	ctrl	serial data from controller to host
-RTS	7	4	host	“ready to send”, handshake=’0’ when controller may
				send
TXD	3	5	host	serial data from host to controller
-CTS	8	6	ctrl	used as “ready to receive”, handshake=’0’ when host
				may send
-DTR	4	7	host	ignored
RI	9	8	n/u	not used
SG	5	9	com	signal ground
n/u	n/c	10	n/u	connector key

Signal electrical characteristics are given in the following table. These specifications comply with ANSI/EIA/TIA 232-E.

Table B.5 Serial signal electrical characteristics

Parameter	Value	Applicable Signals1	EIA-232 subsec.
Minimum ON state input voltage2	+3 volts	TxD, RTS, DTR	2.1.3
Minimum OFF state input voltage2	-3 volts	TxD, RTS, DTR	2.1.3
DC Load Resistance, receiver	5 k_ ± 2 k_	TxD, DTR	2.1.4
DC Load Resistance, RTS	1.75 k_ ± 500 _	RTS	2.1.4
Source Impedance (Power Off)	> 300 _	DSR, DCD,CTS, RxD	2.1.5
Power-off condition interpretation	ON condition	RTS, DTR	2.1.5
Output Voltage, Open Circuit	25 volts, max.3	RxD, DSR, DCD, CTS	2.1.6
Output Voltage into test load4	>5 volts;	RxD, DSR, DCD, CTS	2.1.6
	<15 volts3
Short Circuit Current	<100 mA	RxD, DSR, DCD, CTS	2.1.6
Transition Characteristics	per EIA-232-E	RxD, DSR, DCD, CTS	2.1.7

1.Signals defined in Table 1. Serial Connector, P2, signal names and functions

2.Measured with respect to circuit SG, Signal Ground.

3.Absolute magnitude.

4.Output voltage measured over the entire range of test load from 3000 ohms to 7000 ohms.

B-73

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Contents Page Elo IntelliTouch /SecureTouch Touchscreen Guide Disclaimer Page Intellitouch 10-YEAR Warranty Page Table of Contents Index List of Figures Viii List of Tables Page Introduction Intellitouch TechnologyIntelliTouch Touchscreen IntelliTouch TouchscreenIntelliTouch controller IntelliTouch ControllerAgency Approvals Driver SoftwareWork Area Safety InformationDesign Considerations for CRTs and LCDs Getting StartedProtective Clothing Bezel design Bezel DesignCRT Integration Safety InformationSuggested Tools Definition of TermsTypical IntelliTouch Touchscreen Installation Summary of Installation StepsIncoming Inspection Testing the MonitorDisassembling the Monitor Unpacking the TouchscreenDischarge the CRT Remove the Back CaseRemove the Electronic Chassis 14I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Remove the CRT Verify Touchscreen Fit Page Attaching the Touchscreen Proper placement of adhesive tape to the touchscreen Spacing the CRT from the Bezel Installing the Controller Touchscreen Cabling System for Internal Serial Controller Internal Serial Controller 2500SP4 Pins Signal Function 24I n t e l l i T o u c h / S e c u r e T o u c h G u i d e External Serial Controller 26I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Internal USB Controller 2500U Internal USB Controller 2500U28I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Reassembling the Monitor Routing the Touchscreen CablesProper Sealing Improper Sealing Sealing the MonitorSystem Evaluation Sealing Material SelectionProper Bezel Mounting Improper Bezel Mounting LCD Integration Unpacking the Touchscreen Definition of Terms Disassembling the LCD MonitorRequired Parts for Serial Connection Tools and EquipmentRequired Parts for USB Connection Optional Parts for USB Connection Optional Parts for Serial ConnectionRemoving the LCD Removing the Rear CaseDetermining Touchscreen Fit Mounting the Touchscreen Attaching double-sided adhesive tape to the touchscreen Spacing the LCD from the Bezel Sealing10 2500S Internal Serial Controller 11 2500U USB controller Parasitic Tap of 5Vdc Power12 DC to DC converter Parasitic Tap of 7-30Vdc DC to DC converterModifying the Case for USB Output Modifying the Case for Serial Output13 Horizontal escutcheon plate Re-assembling the Display48I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Troubleshooting Process Troubleshooting GuideSoftware Troubleshooting Display ProblemsVideo Alignment Problems Hardware TroubleshootingSerial Controller Using the Comdump UtilityByte Byte DescriptionHost Signal Source P2 Pins DB25RS-232 Connections Power Connections Touchscreen and Touchscreen Cables Figure A.2 Transducer and Wedge AssemblyEC2 Cable IC1 Cable2x6 Male Header DB9 Male Function IntelliTouch Serial Controllers Diagnostic LEDsIntelliTouch Serial Controller 2500S Diagnostic CodesAA Bit Value hex Description Figure A.4 DB9 and DB25 Connector Pin Positions DB9 and DB25 Connector Pin PositionsSpecifications Mechanical IntelliTouch TouchscreensOptical EnvironmentalUL Compliance Fire Retardation FCC Compliance Agency ApprovalsIntelliTouch 2500U USB Controller Physical CharacteristicsElectrical Touchscreen Connector Power Connector, P4 P2 pin number Signal name Standard wire color Signal name P4 pin Signal function Signal name P3 pin Signal functionAgency Approvals LED Diagnostic CharacteristicsLED Blink Rate Function LED State FunctionFigure B.4 2500U USB Controller, top view 2500U USB Controller DrawingsFigure B.6 2500U USB Controller, bottom-view Environments IntelliTouch 2500S Serial Controller72I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Parameter Value Applicable Signals EIA-232 subsec Signal Name DB-9 P2 pin Sourced by Signal FunctionBoard mounted Cable applied Header Plug Jumper Function Jumper Settings76I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Figure B.11 2500S Serial Controller, top view DrawingsFigure B.13 2500S Serial Controller Part Number Description ELO Part NumbersCables Stylus 82I n t e l l i T o u c h / S e c u r e T o u c h G u i d e Glossary Page Glossary-85 Page Glossary-87 Vertical Refresh Rate-See Refresh Rate Index Page Page