DOP8/16/24 Optoisolated Digital Input Board User`s Manual
Contents
1. EE NN EN EN mm EE EN mm mm EEN EM E ml OOOO OOO OOOO id ee ee oe 00 00 00 gt e eo ee ee ee oom CON com CON com CON OOH con sem eon oo com ER EE HEG HE AA eee 00 0 ee eee oo 000 000 000 OOK 000 000 ooo SE DDIDIDIVX eco eee YO eee 000 se e 00 0 000 000 Ai Se EE EE ge HO00090 meeeeL O meeeeee ditataan SMS ome NE NE mm HE NE mn RN21 i Fig 1 DOP8 16 24 Board Layout Connecting to the PC Interface Board Figure 2 shows the DOP24 s P1 I O connector pinout with all of the pins used by the DOP24 board labeled The DOP8 board uses DOUTO through 7 only and the DOP16 board uses DOUTO through DOUTIS only The DOP board is pin for pin compatible with Real Time Devices DIO24 and DIO48 boards with pinouts for connec tion to opto 22 systems DouTi6 DOE DouTi7 3 4 pour18 5 6 pourig 7 N C DIGITAL GND DIGITAL GND DIGITAL GND DOUT20 DIGITAL GND DOUT21 DIGITAL GND DOUT22 DIGITAL GND DOUT23 DIGITAL GND DOUTS G Q8 DIGITAL GND DOUTS DIGITAL GND DOUTIO 67 2 DIGITAL GND DOUT11 63 4 DIGITAL GND DOUTI2 5 68 DIGITAL GND DOUT13 67 8 DIGITAL GND DOUT14 DIGITAL GND DOUTI5 67 63 DIGITAL GND DOUTO 63 G4 DIGITAL GND DOUTI 5 69 DIGITAL GND DOUT2 67 G8 DIGITAL GND DOUT3 DIGITAL GND DOUT4 DIGITAL GND DOUTS DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND2. DOP8 16 24 Optoisolated Digital Input Board User s Manual D O Real Time Devices USA Inc ies ee Zn Accessing the Analog World Publication No DOP24 9742 DOP8 16 24 User s Manual TTD REAL TIME DEVICES USA Post Office Box 906 State College Pennsylvania16804 Phone 814 234 8087 FAX 814 234 5218 Published by Real Time Devices USA Inc P O Box 906 State College PA 16804 Copyright O 1997 by Real Time Devices Inc All rights reserved Printed in U S A Rev A 9742 INTRODUCTION The DOP8 DOP16 and DOP24 optoisolated digital input boards provide 8 16 or 24 optoisolated input channels for digital signal sensing and switch monitoring applications These boards can drive 8 16 or 24 digital input lines and are pin for pin compatible with DIO24 and DIO48 boards that can be used to directly drive opto 22 racks The DOP8 16 24 features e 8 16 or 24 optoisolated digital input channels e LED indicators to monitor input logic status e Input buffered with voltage comparators e Adjustable threshold level e On board screw terminals for easy wiring What Comes With Your Board You receive the following items in your DOP8 16 24 package e DOP8 DOP16 or DOP24 mechanical relay output board e User s manual If any item is missing or damaged please call Real Time Devices Customer Service Department at 814 234 8087 If you require service outside the U S co
3. Fig 2 P1 I O Connector Pin Assignments Connecting to the Signal Sources The DOP8 16 24 is connected to a signal source as shown in Figure 3 For example the circuit may be used to detect closure of a switch The positive side of the switch would be connected to the positive terminal on the DOP board and the negative or ground side would be connected to the negative terminal The channel output is connected to a digital input line on your digital VO board through DOP8 16 24 connector Pl If your interface board s digital I O is provided by an 8255 programmable peripheral interface PPI then you must set up the lines that routed through the optoisolation circuitry on the DOP as mode 0 inputs The interface board manual tells you how to set up the PPI TB1 and TB2 are 25 terminal miniature screw terminal strips which let you easily connect and disconnect the digital inputs from external devices TB1 and TB2 also provide ground terminals for your convenience DOP8 16 24 Circuitry Figure 3 shows a single channel on the DOP board All channels are identical To show how the circuit oper ates let s use our example of detecting switch closure When the switch is open there is no current flow through the input circuit the DOP LED is off and the digital output is low or 0 When the switch is closed a current is gener ated in the input circuit the LED lights and the digital output goes high or to 1 The input signal is buffer
4. control of REAL TIME DEVICES OR AS A RESULT OF SERVICE OR MODIFICATION BY ANYONE OTHER THAN REAL TIME DEVICES EXCEPT AS EX PRESSLY SET FORTH ABOVE NO OTHER WARRANTIES ARE EXPRESSED OR IMPLIED INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND REAL TIME DEVICES EXPRESSLY DISCLAIMS ALL WARRANTIES NOT STATED HEREIN ALL IMPLIED WARRANTIES INCLUDING IMPLIED WARRANTIES FOR MECHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE LIMITED TO THE DURATION OF THIS WARRANTY IN THE EVENT THE PRODUCT IS NOT FREE FROM DEFECTS AS WARRANTED ABOVE THE PURCHASER S SOLE REMEDY SHALL BE REPAIR OR REPLACEMENT AS PROVIDED ABOVE UNDER NO CIRCUMSTANCES WILL REAL TIME DEVICES BE LIABLE TO THE PURCHASER OR ANY USER FOR ANY DAMAGES INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAM AGES EXPENSES LOST PROFITS LOST SAVINGS OR OTHER DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PRODUCT SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSE QUENTIAL DAMAGES FOR CONSUMER PRODUCTS AND SOME STATES DO NOT ALLOW LIMITA TIONS ON HOW LONG AN IMPLIED WARRANTY LASTS SO THE ABOVE LIMITATIONS OR EXCLU SIONS MAY NOT APPLY TO YOU THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO HAVE OTHER RIGHTS WHICH VARY FROM STATE TO STATE C 3 C 4
5. ed with a voltage comparator to allow flexible signal conditioning A threshold trimpot TR1 is included on the board to adjust the threshold level for all channels The level is factory set at about 1 milliampere In a noisy environment you may want to adjust the threshold level to a higher setting to achieve the required noise immunity and prevent false readings This is done by connecting an input circuit such as one using a 5 volt supply and appropriate series resistance and adjusting TR1 until the LED for channel 1 turns on at a higher input current level such as 5 or 10 milliamperes Bar gt wessen THRESHOLD Fig 3 DOP8 16 24 Channel Circuit Diagram APPENDIX A DOP8 16 24 SPECIFICATIONS A 2 DOPS 16 24 Characteristics Typical E 25 C Input Circuitry Nimbertoftchannels ie EE EE Ge Reid Ge Ed RR See 8 16 or 24 I ype 6f optoisolator 2 Ee A oe De De Gee Gee ge weke 4N25 Input current per channel nanna 80 mA max B ffening toi td voltage comparator Threshold voltage current seen nn 1 5 volts 1 mA adjustable Maximum input voltage eee ee nee ee ee Re nar arr rna 1500 Vdc Current Requirements EBWOlS IAPUtS D EE da 85 mA Power Requirements EMOS it Na adi From PC bus Connectors Two 50 pin box headers Screw Terminals TB1 and TB2 25 terminal 22 12 AWG wire Size 6 875 L x 5 0 W 175mm x 127mm A 3 A 4 APPENDIX B DOP24 PINOUT B 2 DOP24 Pin
6. ntact your local distributor In addition to the items included in your DOP8 16 DOP24 package Real Time Devices offers a full line of board accessories Key accessories for the DOP include the TB50 terminal board and XB50 prototype terminal board which can be connected to the daisy chain connector for prototype development and easy signal access and the DWK 1 and DWK 2 discrete wire kits for connecting 40 pin interface boards to the 50 pin DOP board Using This Manual This manual is intended to help you get your new board running quickly while also providing enough detail about the board and its functions so that you can enjoy maximum use of its features even in the most complex applications We assume that you already have an understanding of data acquisition principles and that you can provide the software necessary to control the DOP board When You Need Help This documentation package should provide enough information for you to achieve your desired results If you have any problems using this board contact our Technical Support Department 814 234 8087 during regular business hours eastern standard time or eastern daylight time or send a FAX requesting assistance to 814 234 5218 When sending a FAX request please include your company s name and address your name your telephone number and a brief description of the problem DOP8 16 24 DESCRIPTION Board Layout The DOP8 16 24 board layout is shown in Figure 1 below
7. out DOUT12 DOUT13 5 VOLTS B 3 N C DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND DIGITAL GND B 4 APPENDIX C WARRANTY C 2 LIMITED WARRANTY Real Time Devices Inc warrants the hardware and software products it manufactures and produces to be free from defects in materials and workmanship for one year following the date of shipment from REAL TIME DE VICES This warranty is limited to the original purchaser of product and is not transferable During the one year warranty period REAL TIME DEVICES will repair or replace at its option any defective products or parts at no additional charge provided that the product is returned shipping prepaid to REAL TIME DEVICES All replaced parts and products become the property of REAL TIME DEVICES Before returning any product for repair customers are required to contact the factory for an RMA number THIS LIMITED WARRANTY DOES NOT EXTEND TO ANY PRODUCTS WHICH HAVE BEEN DAM AGED AS A RESULT OF ACCIDENT MISUSE ABUSE such as use of incorrect input voltages improper or insufficient ventilation failure to follow the operating instructions that are provided by REAL TIME DEVICES acts of God or other contingencies beyond the
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