Black Box ACX4000 Manual Download Page 39

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DEVICE VIEWS

ACX4000- KVM Local/ Remote Unit with audio – rear view

ACX4000- KVM Dual head, Local/ Remote Unit, with optional audio – rear
view

Connect to 5V power

supply

Connect to 5V power

supply

INTERCONNECT – carries 2

video –

Connect to Local/ Remote Unit with

CATx- cable

INTERCONNECT – carries 1

video

and data signals – Connect to Local/

Remote Unit with CATx- cable

INTERCONNECT – carries video and

data signals – Connect to Local/

Remote Unit with CATx- cable

Summary of Contents for ACX4000

Page 1: ...ACX4000 DVI D CatX Multiplex Repeater Cross point Switch Single head KVM Switch Dual head KVM Switch Manual http www blackbox com...

Page 2: ...be switched in turn to a single display The changeover can be triggered remotely using the serial interface RS232 and or by a push button at the device As a 7 port KVM Switch up to 7 Single head port...

Page 3: ...t For an introduction to the Converter see Chapter 2 The Converter product codes covered in this manual are ACX4000 7 port Switch ACS4100A T ACX4000 DVI only Local Unit ACS4122A T ACX4000 DVI serial a...

Page 4: ...acturer assume any liability for damages resulting from the use of the information contained herein The manufacturer reserves the right to change the specifications functions or circuitry of the produ...

Page 5: ...LEERE SEITE 5...

Page 6: ...IEC 61000 4 3 2001 IEC 61000 4 4 2001 EN 61000 3 2 2001 EN 61000 3 3 2002 The device was tested in a typical configuration with CPU This equipment has been found to comply with the limits for a Class...

Page 7: ...t any airflow Do not place a power supply directly on top of a unit Do not obscure a unit s ventilation holes To safeguard against personal injury and avoid possible damage to equipment or property pl...

Page 8: ...tch for CATx 26 Configuration Multiplex Repeater 1 Source up to 7 Displays 26 Configuration Multiplex Repeater 2 Sources each up to 3 Displays 26 Configuration Multiplex Repeater 4 Sources on 4 Displa...

Page 9: ...ostic LEDs 53 Setup 54 Operation 54 By serial interface 54 Control commands 54 7 2 Cross point Switch 55 Configuration Cross point Switch 1 Input 7 Outputs 56 Configuration Cross point Switch 2 Inputs...

Page 10: ...ructions within the command mode 83 Examples 84 7 5 Systeminfo 85 Control command 85 Available Information 85 7 6 Restore Factory Defaults 86 8 Troubleshooting 87 Monitor 87 USB Keyboard USB Mouse 88...

Page 11: ...d Shipping Weight 108 Environmental 109 B ACX4000 Switch Unit 110 Power Supply 110 Interface 110 Maximum Length of Interconnection Cable 110 Type of Interconnection Cable 110 Size and Shipping Weight...

Page 12: ...4000 SWITCH with the help of the provided stickers according to your application 2 Set the DIP switch according to your application 3 Connect ACX4000 Switch to Local unit with CATx cable s 4 Connect A...

Page 13: ...tively signals coming from 7 signal sources can be switched in turn to a display The changeover can be triggered remotely using the serial interface RS232 and or by a push button at the device As a 7...

Page 14: ...ts one Monitor Keyboard Mouse Dual head An extender system that supports two Monitors Keyboard Mouse DVI Digital Video standard installed by Digital Display Working Group www ddwg org R G B CLOCK in a...

Page 15: ...le application for a ACX4000 Switch System Multiplex Repeater or Cross point Switch Up to 7 remote monitors and audio outputs CPU with DVI graphic card and audio output ACX4000 Extender Local Unit Loc...

Page 16: ...ard mouse and touch screen simultaneously You can extend a USB hub but this does not raise the number of supported devices Maximum length of interconnection cable from a Local Unit to a ACX4000 Switch...

Page 17: ...l Unit Dual head ACS4022A T ACX4000 DVI USB HID serial Audio Local Unit Single head ACS4222A T ACX4000 DVI USB HID serial Audio Local Unit Dual head KVM Extender DVI USB HID optional serial audio Remo...

Page 18: ...e Compatible with all standard 2 button 3 button and wheel mice The ACX4000 KVM devices with USB connectors support the extension of keyboard and mouse ONLY use with other HID devices Human Interface...

Page 19: ...Unit Page 46 Selecting the moment of switching to the next frame The transmission of screen data is not synchronous to the screen changes of the graphic card Normally the transmission is terminated d...

Page 20: ...package ACX4000 Switch 1x 5V DC universal power supply for the ACX4000 Switch 1x serial cable RJ45 DB9 Female for switching purpose 1x US type power cord 1x sheet of product stickers User manual Quick...

Page 21: ...ces audio 1x Serial link audio ZIP type cable 1 8m with one side DSUB9pin female connector 2x 3 5mm stereo plugs other side miniDIN8pin male connector The following parts should be in your ACX4000 KVM...

Page 22: ...ATx cable Recommended cable S UTP Cat5 according EIA TIA 56A TSB 36 or Digital STP 17 03170 Four pairs AWG 24 Wiring according EIA TIA 568A 10BaseT Use of cables from a higher category Cat5e Cat6 Cat7...

Page 23: ...etween the ACX4000 switch and Local Unit and between the ACX4000 switch and Remote Unit Use for this either the provided crossed CATx cable or insert the provided crossed cable with the help of the pr...

Page 24: ...t it with your controller More information for control through the serial interface can be found on pages 55 65 or 75 11 Connect the 5V power supplies to the units Only use the power supply originally...

Page 25: ...d or mounting parts If mounted into 19 racks the space to the left and to the right side of the ACX4000 must kept free The ACX4000 Switch its extenders and power supplies may become warm Do not instal...

Page 26: ...o the ACX4000 Media Remote Units Push button no function in this operating mode Push button no function in this operating mode R L R R R R R R Connect to the ACX4000 Media Local Unit Connect to the AC...

Page 27: ...tch 1x7 Connect to 5V power supply Push button no function in this operating mode LA LB LD LC RA RB RD RC Connect to the ACX4000 KVM Media Local Units Connect to the ACX4000 KVM Media Remote Units R1...

Page 28: ...R2 R1 R6 L1 L2 Push button for the sequential selection of pre programmed configurations Connect to 5V power supply Connect to the ACX4000 Media Local Units Connect to the ACX4000 Media Remote Units L...

Page 29: ...tton for the sequential selection of pre programmed configurations Connect to 5V power supply L4 L1 L2 L3 R2 R4 R3 R1 Pushbutton for the sequential selection of pre programmed configurations Connect t...

Page 30: ...o 5V power supply L4 L1 L2 L3 R2 R1 L5 L6 Pushbutton for the sequential selection of pre programmed configurations Connect to 5V power supply Connect to the ACX4000 Media Local Units Connect to the AC...

Page 31: ...K M Connect to the ACX4000 KVM Remote Units Console Video 1 K M L4 L1 L2 L3 R L5 L6 L7 Connect to 5V power supply Connect to the ACX4000 KVM Local Units CPU Push button for the sequential selection o...

Page 32: ...ACX4000 32 ACX4000 Switch rear view Serial Interface RS232 Operating Mode DIP switch...

Page 33: ...CX4000 Media Local Unit ACX4000 Media Remote Unit ACX4000 Media Local Unit with Audio To CPU DVI Connect to remote DVI monitor Connect to local DVI monitor Connect to CPU DVI graphic card Local DVI mo...

Page 34: ...Audio ACX4000 Media Local Remote Unit rear view Audio Out Connect to 5V power supply Remote DVI monitor port connect to remote console monitor Serial Out INTERCONNECT carries video and data signals co...

Page 35: ...Local Remote Unit rear view Connect to 5V power supply Remote keyboard mouse port To CPU DVI graphic card Connect to local DVI monitor INTERCONNECT carries video and data signals connect to Local Remo...

Page 36: ...with audio ACX4000 KVM Remote Unit with Audio Audio In To CPU Serial To CPU DVI Connect to CPU USB Audio Out Serial Out Connect to local DVI monitor Remote DVI monitor port Connect to remote console m...

Page 37: ...hic card 2 nd local DVI monitor port Connect to local console 2 nd monitor Connect to CPU 1 st DVI graphic card Local DVI monitor port Connect to local console monitor 2 nd remote DVI monitor port Con...

Page 38: ...rt Connect to remote console 2 nd monitor 1 st remote DVI monitor port Connect to remote console 1 st monitor Connect to CPU 2 nd DVI Graphic card 2 nd local DVI Monitor port Connect to Local console...

Page 39: ...o rear view Connect to 5V power supply Connect to 5V power supply INTERCONNECT carries 2 nd video Connect to Local Remote Unit with CATx cable INTERCONNECT carries 1 st video and data signals Connect...

Page 40: ...ch for CATx LED Appearance Diagnostics Power LED Red LED Off On Device not ready Device ready Link Status Green Orange LED Off Orange ON Orange blinking Green ON Green blinking No transmission over th...

Page 41: ...rance Diagnostics Power LED Red LED Off On Device not ready Device ready Video Okay Green LED Off On No or invalid video signal detected Device ready Link Status Green LED blinking On No CATx connecti...

Page 42: ...tputs may be changed In doing so it is possible to interconnect two transmitters this may damage the connected equipment The location of the operating mode selector DIP switch is shown below For the s...

Page 43: ...Switch Every port can either be an input to a Local Unit or an output to a Remote Unit Each connection input output is possible 1x IN 7x OUT The signals of one source can be switched to up to 7 displ...

Page 44: ...2 set the DIP switch 3 switch power on the device is resetting 4 switch power off 5 set the DIP switch back 6 switch power on done Operating Mode after Reset Power ON After reset the respective DEFAUL...

Page 45: ...ws at both sides at the bottom of the device Unscrew the UNC type screws on each side of the monitor connectors Carefully displace the lower and upper shells of the case The following diagnostic LEDs...

Page 46: ...locate jumpers DDC colour depth You can select whether the DDC information is taken from internal DDC table from the local monitor or downloaded from the remote monitor and stored in internal table D...

Page 47: ...ocal Unit and stored into the DDC EPROM After a successful programming of the DDC EPROM the Video OK LED at the Local Unit is blinking rapidly for approx 1 second Done Selection of Color depth You can...

Page 48: ...s terminated when a frame is displayed on the screen If the device switches to the new frame during HSYNC the displaying period of the old frame you may see horizontal screen breaks at the moment of s...

Page 49: ...connected to the second stage repeaters allowing up to 49 display units to be headed The distance between a Local Unit and ACX4000 Switch or between a ACX4000 Switch and Remote Unit or between two ACX...

Page 50: ...e transferred over CATx cables to one equivalent Remote Unit This allows an extension to the cable length if the usual 140m distance by CATx cables is not sufficient Connect to 5V power supply Input t...

Page 51: ...OPERATING MODES 51 Example Applications A video audio source is switched over the ACX4000 Switch to 4 different screens loudspeakers Additionally a control monitor can be attached at the Local Unit...

Page 52: ...ACX4000 52 Three cascaded ACX4000 Switches each with a local second screen and 13 screens for presentations...

Page 53: ...ng mode Meaning of the diagnostic LEDs OFF Channel not busy appropriate Local Remote Unit is switched off or interconnection cable disconnected ON Green Channel is busy and the connection to the Local...

Page 54: ...B9 to the CPU is included in delivery For the complete communication protocol and an explanation of the control characters please see Appendix D Protocol for command mode For communication please set...

Page 55: ...CX4000 Switch the transmission continues over CATx cables to up to 7 Remote Units Alternatively a further ACX4000 Switch slave can be used between the first stage switch and further Remote Units There...

Page 56: ...o 6 outputs and transferred over CATx cables to 6 Remote Units Optionally a further ACX4000 Switch can be inserted for a second switching stage R1 R3 R2 R4 R5 R6 R7 L Connect to the ACX4000 Media Remo...

Page 57: ...to 4 outputs and transferred over CATx cables to 4 Remote Units Optionally a further ACX4000 Switch can be inserted for a second switching stage L1 L2 L3 R2 R4 R5 R3 R1 Connect to the ACX4000 Media R...

Page 58: ...to 2 outputs also on several and be transferred over CATx cables on up to 2 Remote Units Optionally a further ACX4000 Switch can be inserted for a second switching stage Push button for the sequentia...

Page 59: ...transferred over CATx cables to one Remote Unit Optionally a further ACX4000 Switch can be inserted for a second switching stage Connect to 5V power supply L4 L1 L2 L3 L5 L6 L7 Connect to the ACX4000...

Page 60: ...ACX4000 60 Example Application Three video sources are switched over the ACX4000 Switch on four different screens...

Page 61: ...he respective DEFAULT Mode is selected 1x7 Input I1 is switched to Output O1 2x6 I1 to O1 and I2 to O2 3x5 I1 to O1 I2 to O2 and I3 to O3 4x4 I1 to O1 I2 to O2 I3 to O3 and I4 to O4 5x3 I1 to O1 I2 to...

Page 62: ...busy appropriate Local Remote Unit is switched off or interconnection cable disconnected BLINKING Green Channel of the current selected CPUs BLINKING Orange Selection of an inactive channel ON Green...

Page 63: ...perated for longer than 2 seconds With the first key press the macro display is switched on The LED with the number of the active selected macro flashes With each key press the display will switch to...

Page 64: ...TX 0x54 ETX Reset the switch and set the connections as a function of SW7 see above STX 0x40 0x80 ETX Read the system info version number from the switch STX 0x52 ETX Switch off all local remote conne...

Page 65: ...ascading of the ACX4000 KVM Switch in two stages is in all application areas allowed so up to 49 CPUs to be addressed In addition to the DVI signals and USB for keyboard mouse bi directional stereo au...

Page 66: ...ACX4000 66 Example Application Four CPUs are switched over the ACX4000 Switch to one console...

Page 67: ...ACX4000 KVM Switches are cascaded it is on the highest level directly after the console The device is Slave if ACX4000 KVM Switches are cascaded it is on second level directly after the Local Units O...

Page 68: ...appropriate Local Remote Unit is switched off or the interconnection cable is disconnected BLINKING Green Channel of the current selected CPUs BLINKING Orange Selection of an inactive channel ON Green...

Page 69: ...ess the display will switch to the next channel as indicated by a rapidly blinking LED If the last channel is reached the device will cycle to the first channel b By serial interface You can find the...

Page 70: ...tatus from macro where Loc No 7Bit date 1 to 7 Macro No 7Bit date 1 to 8 Examples STX 0x54 ETX Reset the switch and set the connections as a function of SW7 see above STX 0x40 0x80 ETX Read the system...

Page 71: ...put of letters does not differentiate between large and lower case SHIFT shifts between upper and lower case Key1 Key2 means that all keys must be pressed at the same time Key1 Key2 means that the key...

Page 72: ...delivery status 1 1 CTRL SHIFT I simultaneous 2 Scroll lock Scroll lock press twice rapidly 3 left SHIFT left SHIFT press twice rapidly 4 left CTRL left CTRL press twice rapidly 5 left ALT left ALT pr...

Page 73: ...mber of the port Caution Applies only to the selected level M x S y RETURN or M 0 x S 0 y RETURN Only in cascaded applications Switch the master to port 0x and the attached slave on port 0y with x and...

Page 74: ...to 7 y ASCII digits 1 to 7 Examples CTRL SHIFT I Call the command mode SHIFT 3 Switch immediately to port 3 after call the master is selected M2S5 RETURN Switch the master to port 2 and the slave to...

Page 75: ...tages for all applications allowing up to 9 dual head CPUs to be addressed In addition to the DVI signals and USB for keyboard mouse bi directional stereo audio serial RS232 V24 can be transferred by...

Page 76: ...ACX4000 76 Example Application Three CPUs with dual head graphic cards and local consoles switched over the ACX4000 Switch to one console...

Page 77: ...if ACX4000 KVM Switches are cascaded it is on highest level directly after the console The device is slave if ACX4000 KVM Switches are cascaded it is on second level directly after the Local Units Op...

Page 78: ...y or appropriate Local Remote Unit is switched off or the interconnection cable is disconnected BLINKING Green Channel of the current selected CPUs BLINKING Orange Selection of an inactive channel ON...

Page 79: ...ess the display will switch to the next channel indicated by a rapidly blinking LED If the last channel is reached the device will switch to the first channel b By serial interface You can find the al...

Page 80: ...Examples STX 0x54 ETX Reset the switch and set the connections as a function of SW7 see above STX 0x40 0x80 ETX Read the system info version number from the switch STX 0x47 0x81 0x81 ETX Switch conso...

Page 81: ...ters does not differentiate between large and lower case SHIFT shifts between upper and lower case Key1 Key2 means that all keys must be pressed at the same time Key1 Key2 means that the keys must be...

Page 82: ...delivery status 1 1 CTRL SHIFT I simultaneous 2 Scroll lock Scroll lock press twice rapidly 3 left SHIFT left SHIFT press twice rapidly 4 left CTRL left CTRL press twice rapidly 5 left ALT left ALT pr...

Page 83: ...mber of the port Caution Applies only to the selected level M x S y RETURN or M 0 x S 0 y RETURN Only in cascaded applications Switch the master to port 0x and the attached slave on Port 0y with x and...

Page 84: ...y ASCII digits 1 to 3 Examples CTRL SHIFT I Call the command mode SHIFT 3 Switch immediately to port 3 after call the master is selected M2S1 RETURN Switch the master to port 2 and the slave to 1 3 R...

Page 85: ...cable RJ45 on DB9 to a CPU is included in delivery For communication please set up the format of the serial data communication to 115 2K 8 1 NO 115 2 KBAUD 8 Data bit 1 Stop bit NO parity Control comm...

Page 86: ...e In the Cross point Switch operating mode all macros in memory are reset Standard operating mode Reset the ACX4000 Switch to default settings Factory Reset 1 switch power off 2 set the DIP switch 3 s...

Page 87: ...tted each second expires the capability of the data link Therefore the data have to be reduced before transmitting This is done in a first step by a so called RLE Run Length Encoding algorithm If this...

Page 88: ...Depending to our measurements a delay of approx 100 150msec are recognized as disturbing The total delay comes from time values are approx values 5 to 15msec for mouse movement and data transmission t...

Page 89: ...compression Avoid photos for background or horizontally graduated colors better use monochrome backgrounds They allow higher compression higher frame rates If and only if the link has frame dropping a...

Page 90: ...ACX4000 90 Appendix A Example Applications This section illustrates some specific applications using the ACX4000 Minor ACX4000 as Multiplex Repeater with audio option...

Page 91: ...APPENDIX A EXAMPLE APPLICATIONS 91 Three cascaded ACX4000 as Multiplex Repeater and a total of 13 screens for presentations...

Page 92: ...ACX4000 92 ACX4000 as Cross point Switch here 3x Input 4x Output...

Page 93: ...APPENDIX A EXAMPLE APPLICATIONS 93 ACX4000 as Single head KVM Switch to 7 1 optional with a local console and or serial audio option...

Page 94: ...ACX4000 94 ACX4000 as Dual head KVM Switch to 3 1 with a local console...

Page 95: ...the list of parts delivered allow covering unused device positions Rack mount kit 455 4G List of parts delivered Mounting instruction Align the holes on the base plate with the vacant screw holes on...

Page 96: ...can mount a rack mountable p s u type 455 PS instead of a regular device This p s u is capable of powering up to three devices Please note Use the rear mounting holes to fix the p s u After mounting t...

Page 97: ...rts delivered allow covering unused device positions Rack mount kit 455 8G List of parts delivered Mounting instruction Align the holes on the base plate with the vacant screw holes on the base of the...

Page 98: ...allows mounting of up to 4 devices In the lefthand position you can mount a rack mountable p s u type 455 PS instead of a regular device This p s u is capable of powering up to three devices 19 rack...

Page 99: ...nit s serial port is wired as DTE i e the same as that on a PC To connect a serial printer or other DTE rather than DCE device to the Remote Unit you will need a Null Modem crossover cable between the...

Page 100: ...he link Audio Interface Using a Microphone A microphone may be plugged into the Line In connector on the Remote Unit There are two ways of setting up a microphone The Local Unit s Line Out connection...

Page 101: ...ption Command byte in the range of 0x40 0x6F see the list of allowed commands below Data Bytes a Binary data in order to prevent that during the transmission of binary data control statements or contr...

Page 102: ...Errors occurred NAK b No errors ACK c Optional reply telegram with data a repeat telegram b next command c receive and process the replay telegram Telegrams global functions Function Telegram Answer 1...

Page 103: ...UTPUT STX 0x47 INPUT No OUTPUT No ETX ACK 2 switch off a single OUTPUT STX 0x48 OUTPUT No ETX ACK 3 switch a single OUTPUT feedback channel to INPUT STX 0x4B INPUT No OUTPUT No ETX ACK 4 switch off a...

Page 104: ...ers what type of keyboard brand of mouse make and model of monitor type and make of cable etc Any particular application that when used appears to create the problem or make it worse The results of an...

Page 105: ...blackbox fr 33 820 07 09 11 33 820 05 07 09 Germany www black box de techsupp black box de 49 811 5541 110 49 811 5541 499 Ireland www blackbox co uk techhelp blackbox co uk 353 1 662 2466 353 1 662...

Page 106: ...ation is constructed for HID devices HID is a device class enabling inputs to a CPU Touch screens graphic tablets fingerprint sensors are also HID devices Some devices install additional devices e g t...

Page 107: ...45 1000 Mbit High speed transmission Wiring acc EIA TIA 568B Gigabit Ethernet Audio Interface Description Bi directional stereo audio link Transmission Method Digitized virtually CD quality audio 16 b...

Page 108: ...ble acc EIA TIA 56A TSB 36 or Digital STP 17 03170 Four pairs AWG 24 Wiring acc EIA TIA 568A 10BaseT CATx patch cable AWG26 8 stranded cable S UTP Cat5 cable acc EIA TIA 56A TSB 36 or Digital STP 17 0...

Page 109: ...APPENDIX G SPECIFICATIONS 109 Environmental Operating Temperature 41 to 113 F 5 to 45 C Storage Temperature 13 to 140 F 25 to 60 C Relative Humidity max 80 non condensing...

Page 110: ...Handshake DSR Maximum Length of Interconnection Cable CATx installation cable AWG24 solid cable 140m 400ft CATx patch cable AWG26 8 stranded cable 70m 200ft Type of Interconnection Cable CATx install...

Page 111: ...00 Switch 103 x 143 x 42mm 4 x5 6 x1 7 Weight 0 6kg 1 3lb Shipping box 460x250x120mm 18 1 x9 8 x4 7 Weight 1 6 kg 3 5lb Environmental Operating Temperature 41 to 113 F 5 to 45 C Storage Temperature 13...

Page 112: ...a 2 10 T M D S data 1 18 T M D S data 0 3 T M D S data 2 GND 11 T M D S data 1 GND 19 T M D S data 0 GND 4 n c 12 n c 20 n c 5 n c 13 n c 21 n c 6 DDC Input SCL 14 5V high impedance 22 T M D S clock G...

Page 113: ...ouse connector USB type B Signal Output Local Unit Pin Signal 1 VCC 5V Red 2 Data White 3 Data Green 4 GND Black Keyboard Mouse connector USB type A Signal Output Remote Unit Pin Signal 1 VCC 5V Red 2...

Page 114: ...ace Single head KVM devices only audio serial option Connector Remote Unit Connector Local Unit Pin Signal Pin Signal 1 n c 1 n c 2 RxD 2 RxD 3 TxD 3 TxD 4 DTR 4 DTR 5 GND 5 GND 6 DSR 6 DSR 7 RTS 7 RT...

Page 115: ...ctor Audio RS232 Dual head and Media Local Unit only Pin 1 AUDIO GND 2 RS232 GND 3 AUDIO OUT RIGHT CHANEL 4 AUDIO OUT LEFT CHANEL 5 RS232 RxD 6 AUDIO IN RIGHT CHANEL 7 AUDIO IN LEFT CHANEL 8 RS232 TxD...

Page 116: ...ACX4000 116 B ACX4000 Switch Unit Serial Interface switch socket DCE Pin Pin 1 5V Out 5 TxD Out 2 n c 6 RxD In 3 DSR In 7 n c 4 GND 8 n c 1 8...

Page 117: ...APPENDIX H CONNECTORS 117 C All ACX4000 Devices Power Supply Pin Signal Inner 5V Outer GND CATx Interfaces Wiring acc EIA TIA 568A 10BaseT Pin Pin 1 D1 5 D3 2 D1 6 D2 3 D2 7 D4 4 D3 8 D4 1 8...

Page 118: ...118 Appendix I Connection Cable Serial cable to connect the external switchbox to CPU Pin Signal Pin Signal 1 n c 1 5V 2 RxD 2 n c 3 TxD 3 DSR 4 DTR 4 GND 5 GND 5 TxD 6 DSR 6 RxD 7 RTS 7 n c 8 CTS 8 n...

Page 119: ...NOTES...

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