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Chapter 4

Digital I/O Functionality

NI CVS-1450 Series User Manual

4-14

ni.com

Figure 4-7.  

Example of Using an External Flyback Diode for Inductive Loads

Transmission Line Effects

Transmission line effects can degrade the signals on the I/O cables and 
cause instability. To minimize transmission line effects, use twisted-pair 
wires with a characteristic impedance of 118

Ω 

to connect external signals 

to the 44-pin I/O DSUB connector. Use a 75

Ω

 coaxial cable, such as 

RG-179, to connect to the SMB connectors.

Figure 4-8 shows connections to the 44-pin DSUB connector and the 
TRIG 0 SMB connector that minimize transmission line effects.

Digital

Output

Viso

Ciso

Vcc

CVS-1450 device

External
Flyback 

Diode for 

Inductive Loads

Load

Содержание NI Vision CVS-1450 Series

Страница 1: ...NI Vision NI CVS 1450 Series User Manual NI CVS 1450 Series User Manual July 2005 373610E 01...

Страница 2: ...a 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 2...

Страница 3: ...surges fire flood accident actions of third parties or other events outside reasonable control Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form ele...

Страница 4: ...t of Communications DOC Changes or modifications not expressly approved by NI could void the user s authority to operate the equipment under the FCC Rules Class A Federal Communications Commission Thi...

Страница 5: ...enu items and dialog box options Bold text also denotes hardware labels and parameter names italic Italic text denotes variables emphasis a cross reference or an introduction to a key concept Italic t...

Страница 6: ...ware Documents 2 3 Vision Builder AI Documents 2 3 NI IMAQ for IEEE 1394 Cameras Driver Software Documents 2 3 Vision Development Module and LabVIEW Real Time Module Documents 2 3 Vision Development M...

Страница 7: ...ge Using the LabVIEW Real Time Module 2 17 Chapter 3 LEDs DIP Switches and Connectors LED Indicators 3 1 POWER OK LED 3 2 STATUS LED 3 2 ACT LINK LED 3 2 100 Mbps LED 3 2 DIP Switches 3 3 SAFE MODE Sw...

Страница 8: ...Connecting the Digital I O 4 12 Wiring an Isolated Input to a Sourcing Output Device 4 12 Wiring an Isolated Output to an External Load 4 12 Protecting Inductive Loads 4 13 Transmission Line Effects 4...

Страница 9: ...atus information and to configure the CVS 1450 device settings When configured the CVS 1450 device can run applications without a connection to the development computer Each CVS 1450 device ships with...

Страница 10: ...0 Series front panel Figure 1 1 CVS 1450 Series Front Panel 1 Power LED 2 Status LED 3 Isolated Digital Input 4 TTL Digital Outputs 5 IEEE 1394a Ports 6 TTL I O and Isolated I O 7 Reset Button 8 DIP S...

Страница 11: ...three common video formats Use this table as a guide when determining the combination of cameras to use in your application Note Bandwidth calculations described in Table 1 1 do not include software d...

Страница 12: ...94 Cameras is the interface path between the application software and the CVS 1450 device NI IMAQ for IEEE 1394 Cameras includes an extensive library of VIs you can call from LabVIEW These VIs include...

Страница 13: ...ated inspection With Vision Builder AI you can perform powerful visual inspection tasks and make decisions based on the results of individual tasks You can also migrate your configured inspection to L...

Страница 14: ...ations NI Vision Assistant which is included with the Vision Development Module is an interactive prototyping tool for machine vision and scientific imaging developers With Vision Assistant you can pr...

Страница 15: ...amera IEEE 1394 jackscrew to latch cable part number 778796 01 or any standard IEEE 1394 cable Facilitates plug and play connection from the CVS 1450 device to up to three 1394 cameras You can use a 4...

Страница 16: ...er NI LabVIEW Real Time Module 7 0 or later with the Vision Development Module 7 0 or later Accessories National Instruments offers the following accessories for use with a CVS 1450 device Hardware VG...

Страница 17: ...Tutorial NI Vision Builder for Automated Inspection Configuration Help NI Vision Builder for Automated Inspection Inspection Help NI IMAQ for IEEE 1394 Cameras Driver Software Documents Getting Start...

Страница 18: ...do so Disconnect all field power prior to removing covers or shields If the device is rated for use with hazardous voltages 30 Vrms 42 4 Vpk or 60 Vdc it may require a safety earth ground connection...

Страница 19: ...ized impulse withstand voltage levels that commonly occur in electrical distribution systems The following is a description of Installation Measurement3 Categories Measurement Category I is for measur...

Страница 20: ...fixed installation and stationary motors with permanent connections to fixed installations Measurement Category IV is for measurements performed at the primary electrical supply installation 1 000 V...

Страница 21: ...already configured on a network you must configure the CVS 1450 device on the same network If the development computer is not connected to a network you can connect the two directly using a CAT 5 or C...

Страница 22: ...1394 cable Ethernet cable Monitor Connecting a Camera and Monitor to the CVS 1450 Device Before connecting a camera and monitor to the CVS 1450 device make sure that all CVS 1450 device DIP switches...

Страница 23: ...reater than 30 VDC Doing so could damage the CVS 1450 device To connect power to the CVS 1450 device refer to Figure 2 3 while completing the following steps 1 Plug the 4 position connector from the p...

Страница 24: ...NI desktop power supply follow the instructions in this section to connect power to the CVS 1450 device Note If you are not using the NI desktop power supply use 0 75 mm2 18 AWG ferrules according to...

Страница 25: ...oltage input labeled V on the 4 position connector 2 Wire the common mode signal ground output of the power supply to the common mode signal input labeled C on the 4 position connector If you are usin...

Страница 26: ...nect the CVS 1450 device to the development computer refer to Figure 2 5 while completing the following steps 1 Verify that the development computer is connected to the network and is powered on 2 Usi...

Страница 27: ...essary for setting up the development computer Vision Builder AI version 2 0 or later NI IMAQ for IEEE 1394 Cameras driver version 1 5 or later Installing Vision Builder AI and NI IMAQ for IEEE 1394 C...

Страница 28: ...ip To uniquely identify unconfigured CVS 1450 devices connect and configure one CVS 1450 device at a time 4 Click Configure to launch the Vision Builder AI Remote Target Configuration Wizard 5 In the...

Страница 29: ...d your acquisition click OK to add the step You can now add inspection steps as documented in the NI Vision Builder for Automated Inspection Tutorial LabVIEW Real Time Module with the Vision Developme...

Страница 30: ...sert the Vision Development Module CD into the CD ROM drive 6 When the splash screen appears click Install Vision Development Module and follow the setup instructions 7 Insert the NI IMAQ for IEEE 139...

Страница 31: ...ization process takes several minutes While the CVS 1450 device is restarting an icon appears next to the device name to indicate that the CVS 1450 device is disconnected The MAX status bar also indic...

Страница 32: ...K 4 Click the Open button 5 Navigate to LabVIEW examples IMAQ 6 Double click IMAQ1394 examples llb and select Grab vi 7 Click the Run button to begin acquiring images Now that you are acquiring images...

Страница 33: ...DIP switches and connectors on the NI CVS 1450 device The Connectors section provides signal names and descriptions for each connector LED Indicators Figure 3 1 shows the location of the POWER OK and...

Страница 34: ...flashes a specific number of times to indicate error conditions or certain DIP switch settings The STATUS LED remains lit if the CVS 1450 device detects an internal error Refer to the Hardware Errors...

Страница 35: ...hes This section describes the SAFE MODE IP RESET NO APP and USER 1 DIP switches on the CVS 1450 device To enable a DIP switch move it to the ON left position and then reset the CVS 1450 device by pre...

Страница 36: ...ce Use Safe mode to reconfigure TCP IP settings and to download or update software from the development computer Downloading incorrect software to the CVS 1450 device may cause it to hang during resta...

Страница 37: ...n the same subnet or you can use an Ethernet crossover cable to connect the CVS 1450 device directly to the development computer NO APP Switch To prevent the CVS 1450 device from automatically running...

Страница 38: ...put circuitry Caution The isolation provided by the CVS 1450 device is intended to prevent ground loops that could introduce noise into the system This isolation does not provide safety isolation Tabl...

Страница 39: ...on the CVS 1450 device to connect the chassis to earth ground Connecting the grounding lug shown in Figure 3 5 to earth ground connects the common mode signal of the main power to earth ground throug...

Страница 40: ...er 1 NI CVS 1450 Series Overview To access the IEEE 1394 connectors on the CVS 1450 device use any standard 6 pin IEEE 1394 cable Note You can use a 4 pin to 6 pin converter cable with cameras that ha...

Страница 41: ...tor on the CVS 1450 device Table 3 3 VGA Connector Signals Pin Number Signal Name Signal Description 1 R Red 2 G Green 3 B Blue 4 NC No Connect 5 C Common mode signal of the CVS 1450 device main power...

Страница 42: ...1 as Port 0 Figure 3 7 shows the location and pinout of the COM1 DSUB 9 pin connector Table 3 4 lists and describes the COM1 signals Figure 3 7 COM1 DSUB 9 Pin Connector 10 C Common mode signal of the...

Страница 43: ...ice automatically detects the speed of the connection and configures itself accordingly If you are connecting the CVS 1450 device to the development computer through a network port use a standard Ethe...

Страница 44: ...nnection to the TTL outputs use the National Instruments SMB 111 coaxial cable part number 763422 01 Note Additional TTL outputs are available on the 44 pin DSUB connector Caution Do not connect volta...

Страница 45: ...more than 100 mA from 24 V or 30 V isolated outputs Do not draw more than 50 mA from 5 V isolated outputs Table 3 5 44 Pin DSUB and 37 Pin Terminal Block Connector Signals 44 Pin DSUB on CVS 1450 Devi...

Страница 46: ...eneral purpose output 14 34 Ciso Isolated common mode signal 15 9 ISO Input 0 Input port Data 0 16 2 TTL Input 1 Pulse generator trigger input General purpose input 17 3 C Common mode signal of the CV...

Страница 47: ...33 16 Ciso Isolated common mode signal 34 14 ISO Input 4 Input Port Data 4 35 15 ISO Input 5 Input port latch Data 5 Pulse generator trigger input 36 28 Ciso Isolated common mode signal 37 25 ISO Inpu...

Страница 48: ...nal 43 30 ISO Input 10 General purpose input General purpose input 44 31 ISO Input 11 User shutdown General purpose input Table 3 5 44 Pin DSUB and 37 Pin Terminal Block Connector Signals Continued 44...

Страница 49: ...ng strobe lighting outputting inspection results or communicating with PLCs You can also define the functions of digital input and output signals For information about how to use the LabVIEW Real Time...

Страница 50: ...that can introduce noise into a system You can apply signals up to 30 V to the isolated inputs The voltage swing of the isolated outputs is determined by the Viso you supply on the connector Note The...

Страница 51: ...450 device uses this input to initiate a timed pulse that can be used for camera control lighting control encoder pulse counting and result output timing Table 4 2 Isolated Inputs and Outputs Primary...

Страница 52: ...lting in a high true or low true signal Based on the polarity setting the output signal asserts after the appropriate delay time and de asserts after the configured pulse width You can set the delay t...

Страница 53: ...output pulse The pulse delay is configurable in units of microseconds or quadrature encoder counts If configured for microseconds available values are between 10 s and 4 294 967 295 s which is 4 294...

Страница 54: ...a microsecond delay and width Figure 4 3 High and Low Pulse Trains Quadrature Encoder The quadrature encoder uses ISO Input 6 for its Phase A input and ISO Input 7 for its Phase B input Encoder speed...

Страница 55: ...ion port you can configure the application software to run the appropriate inspection sequence For example an upstream CVS 1450 device programmed for part classification might drive the product select...

Страница 56: ...th an external event An example of how to use general purpose inputs is reading the status of a general purpose input as the first step in your inspection sequence and recording that value as part of...

Страница 57: ...is dependent on configuration settings of the SAFE MODE DIP switch and the software enabled Shutdown mode Table 4 4 summarizes how user configuration affects the behavior of the CVS 1450 device in the...

Страница 58: ...drive low or 3 state and each isolated output is on off configurable Shutdown mode is unavailable when the SAFE MODE DIP switch is turned on Refer to Table 4 4 for a summary of how user configuration...

Страница 59: ...e I O TTL Output 0 This option outputs a signal on TTL Output 0 A High on TTL Output 0 indicates that the watchdog timer has expired Low indicates that it has not expired If the watchdog timer has exp...

Страница 60: ...Refer to Appendix B Specifications for switching thresholds and current requirements Caution Do not apply a voltage greater than 30 VDC to the isolated inputs Doing so could damage CVS 1450 device Fi...

Страница 61: ...at switching time due to energy stored in the inductive load This flyback voltage can damage the outputs and the power supply To limit flyback voltages at the inductive load install a flyback diode a...

Страница 62: ...tability To minimize transmission line effects use twisted pair wires with a characteristic impedance of 118 to connect external signals to the 44 pin I O DSUB connector Use a 75 coaxial cable such as...

Страница 63: ...ure 4 8 Typical System Setup Digital I O configuration varies depending on the number of cameras your system setup requires You can access the digital I O through the 44 pin DSUB connector or through...

Страница 64: ...e Camera Setup Table 4 5 Typical Single Camera System Setup Signal Name Signal Type Purpose TRIG 0 Isolated input Trigger input from proximity sensor or external device TRIG 1 Timed pulse TTL output E...

Страница 65: ...ces An Ethernet connection between the development computer and the CVS 1450 device allows you to assign an IP address configure the CVS 1450 device download inspection tasks and remotely monitor an o...

Страница 66: ...tify each unit The serial number and MAC address are printed on the top side of each CVS 1450 device unit as shown in Figure 5 2 Figure 5 2 Serial Number and MAC Address Label on the CVS 1450 Device T...

Страница 67: ...t National Instruments Corporation 5 3 NI CVS 1450 Series User Manual Figure 5 3 CVS 1450 Device Connected to a Monitor At any time you can reconnect the host machine to the CVS 1450 device and remote...

Страница 68: ...communicate with unconfigured CVS 1450 devices even if these devices are on the same subnet You can test this by connecting the development computer and the CVS 1450 device directly to a network port...

Страница 69: ...oftware Installed Install application and driver software on the CVS 1450 device Refer to Chapter 2 Setup and Configuration for installation instructions No Camera Found Verify that the total power re...

Страница 70: ...turned on ISO Input 11 is used to indicate to the CVS 1450 device that all external devices are ready for operation When ISO Input 11 turns off the NI 1450 shuts down Either turn on ISO Input 11 with...

Страница 71: ...CVS 1450 device with the NO APP switch enabled prevents any VIs from running at startup Restarting with the SAFE MODE switch enabled starts the CVS 1450 device in Safe mode and does not launch the em...

Страница 72: ...ult in an unresponsive or unstable system and could damage the CVS 1450 device Table A 1 STATUS LED Flashes and Corresponding Error Conditions Number of Flashes Error Condition 0 stays lit The CVS 145...

Страница 73: ...m IEEE 1394 bus power 18 W maximum shared by all three ports Isolated supply1 5 to 30 VDC Memory SDRAM 128 MB Nonvolatile storage CVS 1454 32 MB CVS 1455 128 MB CVS 1456 256 MB Processor CVS 1454 Inte...

Страница 74: ...TTL Inputs and Outputs Digital logic levels TTL Inputs Number of channels 2 Maximum pulse rate 2 MHz Minimum pulse detected 500 ns Power on state Input high impedance 61 9 k pull up to 5 V TTL Outputs...

Страница 75: ...7 1 mA typical 14 mA maximum Maximum pulse rate 100 kHz Minimum pulse detected 10 s Reverse polarity protection Yes 30 V Isolated Current Sourcing Outputs Number of channels 4 On state voltage range...

Страница 76: ...tion for dimensional drawings of the CVS 1450 device Environmental The CVS 1450 Series is intended for indoor use only Operating temperature Vertical mounting position 0 C to 55 C All other positions...

Страница 77: ...lity Emissions EN 55011 Class A at 10 m FCC Part 15A above 1 GHz Immunity EN 61326 1997 A2 2001 Table 1 EMC EMI CE C Tick and FCC Part 15 Class A Compliant Note For full EMC compliance operate this de...

Страница 78: ...ures C 1 C 4 provide dimensional drawings and clearance information for the CVS 1450 Series Caution If you choose not to mount the CVS 1450 device on a DIN rail or flat surface do not position the CVS...

Страница 79: ...te You can ground the CVS 1450 device to your mount by connecting a grounding wire to the grounding lug on the CVS 1450 device Refer to the Earth Ground Connection section of Chapter 3 LEDs DIP Switch...

Страница 80: ...the top and bottom of the CVS 1450 device for air circulation Allow 50 8 mm 2 0 in on the sides of the CVS 1450 device for air circulation Allow enough space in front of the CVS 1450 device to connect...

Страница 81: ...your mount 1 Align the screw holes of your mounting bracket with the four holes on the back of the CVS 1450 device Figure C 1 shows the location of the mounting holes on the CVS 1450 2 Insert four 4 4...

Страница 82: ...l Instruments Application Engineers make sure every question receives an answer For information about other technical support options in your area visit ni com services or contact your local office at...

Страница 83: ...i com calibration If you searched ni com and could not find the answers you need contact your local office or NI corporate headquarters Phone numbers for our worldwide offices are listed at the front...

Страница 84: ...pecification Version 1 30 DIP switch Dual Inline Package switch E Ethernet cable standard CAT 5 or CAT 6 Ethernet cable used to connect a Real Time target to a network port Ethernet crossover cable CA...

Страница 85: ...consisting of a series of continuous pulses R rising edge The digital signal transition from the low state to the high state RS 232 Standard electrical interface for serial data communications S subne...

Страница 86: ...ndard protocols for communicating across a single network or interconnected set of networks UDP is for low overhead transmissions V VDC Volts direct current VI Virtual Instrument A combination of hard...

Страница 87: ...et 5 2 connectors 3 6 COM1 3 10 Ethernet 3 11 IEEE 1394 3 8 SMB 3 6 TRIG 0 3 12 TRIG 1 3 12 TRIG 2 3 12 VGA 3 8 conventions used in the manual v CVS 1450 hardware connecting multiple CVS 1450 systems...

Страница 88: ...al load wiring 4 12 F flyback diode inductive loads figure 4 14 flyback voltage flyback diode 4 13 G grounding lug 3 8 H hardware connection accessories 2 2 basic components 2 8 camera monitor 2 8 con...

Страница 89: ...nd services D 1 network connecting 2 7 specifications B 2 subnet 2 7 NI 1450 hardware DIP switches overview 3 3 IEEE 1394 connector 3 8 optional hardware 2 2 overview 1 1 parts locator 1 2 NI support...

Страница 90: ...outputs B 3 physical characteristics B 4 power requirements B 1 safety B 5 TTL inputs B 2 outputs B 2 STATUS LED 3 2 error indications table A 4 subnet 2 7 5 2 support technical D 1 T technical suppo...

Страница 91: ...ndex National Instruments Corporation I 5 NI CVS 1450 Series User Manual Vision Development Module configuring IP address 2 16 description 1 5 image acquisition 2 17 installing 2 15 W Web resources D...

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