ADU71 User Manual
Contents
1. a 250 ohm resistor to convert the 4 20mA current signal to a 1 5VDC signal as shown in Figure 3 CAUTION Ensure the resistor is correctly and firmly connected to the device input terminals If the resistor is not correctly connected or open circuit the ADU71 will apply 24VDC to the input of the device under control when the ADU71 loop current is enabled This may damage the input circuitry of the device under control CONTROL SYSTEMS USB to Current Output 4 20maA D r sews orrinak nat Serial Ka O talr Figure 3 ADU71 driving a 1 5VDC input VFD or valve If the device under control has a 0 5VDC input the connections are identical to Figure 3 however the ADU71 LOOP is programmed to provide 0 20mA to the loop as shown in Figure 4 J1 USS ONTRAK COHTAOL STSTEMS Ae oe eee 6 eee ADU USB to Current Output 4 20maA 0 20 ae oe nek Serial Ka T10000 5 ata or Figure 4 ADU71 driving a 0 5VDC input VFD or valve Page 150of 18 ADU71 User Manual If the device under control has a 0 10VDC input a 500 ohm resistor or two 250 ohm resistors in series should be shunted across the input terminals of the device under control The ADU71 LOOP is then programmed to provide 0 20mA to the loop as shown in Figure 5 CAUTION Ensure the resistor is correctly and firmly connected to the device input terminals If the resistor is not correctly connected or open circuit the ADU72. mode the ADU71 status LED will turn to green and the output will have to be re enabled by the host application Ensure system power settings are set such that the host computer does not enter sleep mode during normal operation Page 5of 18 ADU71 User Manual 4 AduHidTest USB Device Test Program AduHidTest is a Windows based USB device test program used to test the connection of ADU data acquisition devices to a USB port The program is also a useful tool to allow programmers to become familiar with the ADU 71 command set AduHidTest software can be downloaded from the Ontrak website at http www ontrak net programming htm Note that the program requires the AduHid dll to operate and it should be copied to the dame directory as the AduHidTest exe file Getting Started There are three steps in using a USB device in any application software The three steps are 1 Obtain a handle for the USB device 2 Send commands to the USB device 3 Receive data from the USB device STEP 1 Obtain a handle for the ADU71 A handle is a unique code that application software uses to identify a USB device for the purpose of reading and writing to the device A USB bus can have up to 128 devices connected to a single host and there are three criteria that can be used to open a handle The three criteria are Vendor ID Product ID and Serial Number If a single device is connected to the bus any of the three criteria may be used If multiple devices are c
3. 1 powered but not enumerated GREEN ADU71 powered and enumerated by host computer OFF ADU71 disconnected from USB bus OR host computer has entered SLEEP mode The ADU71 can be connected to the USB bus via the enclosed 10 A B USB cable The cable provides both power and communications connections to the ADU71 When first connected the STATUS led will turn RED indicating power is applied For Windows operating systems a message may flash on the screen indicating New hardware Found ADU71 USB to Current Output Interface Depending on the version of Windows the host may prompt to search for adriver Select Let Windows Search for a Driver and click next After a few seconds the STATUS led will turn green indicating enumeration is complete The enumeration process is completely transparent to the application program as the ADU71 is a USB HID class device Enumeration is completed by the Windows or other operating system standard USB HID drivers The ADU71 can be connected directly to the host hub or externally powered hubs Caution Use of System Sleep If the Windows or other operating system allows the host computer to enter sleep mode attached USB devices will be set to suspend mode In this mode the power draw of the ADU71 drops to less than 2 5mA USB2 0 Specification and the current loop output is put into high impedance mode In suspend mode the ADU 71 Status LED is turned off Once the host computer is revived from sleep
4. 1 will apply 24VDC to the input of the device under control when the ADU71 loop current is enabled This may damage the input circuitry of the device under control USB to Current Output 4 20maA 0 201w awe orirak nae Serial Ka O tirilur Figure5 ADU71 driving a 0 10VDC input VFD or valve Multiple voltage input devices can also be connected to the ADU71 LOOP output provided each is shunted by the appropriate resistor as shown in Figure 6 C 20meA USE to Current Output 4 2 0 20 aara Tial ic Figure6 ADU71 driving multiple O 5VDC voltage input devices with 0 20mA output Page 16 of 18 ADU71 User Manual 8 Specifications and Dimensions supply Voltage NONE Bus Powered USB Supply Current Loop Disabled 65mA Typical 75mA Max USB Supply Current 20mA Loop Current 180mA Typical 200mA Max Operating Temperature 25c Min to 85C Max Current Loop Output Resolution 16 Bits Range 4 20mA or 0 20mA programmable Total Unadjusted Error 0 3 FSR MIN 0 3 FSR MAX Full Scale Error 0 2 FSR MIN 0 2 FSR MAX Temperature Stability 16 ppm FSR Degree C Slew rate ims to 10s Programmable Isolation 2500v Internal Loop Power Supply Voltage 24v Nominal lisolation 2500V Loop Compliance Voltage 21V Minimum Special Functions Internal 24VDC supply eliminates need for Internal Loop Power Supply aaen leonpa un Mounting Options Flange
5. 764 Notre Dame Ave ONTRAK Unit Sudbury Ontario CONTROL SYSTEMS carom die DATA ACQUISITION AND CONTROL 705 671 6127 FAX ADU71 USB to Current Output 4 20mA 0 20mA Transmitter User Manual Ver 1 0 CONTROL SYSTEMS JATA ACOUD TIOR AND CONTHIDI L ADU71 USB to Current Output 4 20mA 0 20A www ontrak not Serial No H10001 www ontrak net EU Declaration of Conformity We the undersigned Manufacturer Ontrak Control Systems Inc Address City 764 Notre Dame Avenue Unit 1 Sudbury Province Country Postal Code Ontario CANADA P3A2T2 Phone and FAX 705 671 2652 705 671 6127 FAX Email Address tom ontrak net certify and declare under our sole responsibility that the following Apparatus Model No ADU 71 SN H10000 and higher Description USB to Current Output Interface Brand Ontrak Control Systems Inc Conforms with the essential requirements of the EMC Directive 2004 108 EC via Annex II based on the following specifications applied RF Emissions EN55011 2009 A1 2010 Class B ESD Immunity IEC 61000 4 2 2008 Level2 Criterion B RF Immunity IEC 61000 4 3 2006 A1 2007 A2 2010 Level 2 Criterion B And therefore complies with the essential requirements and provisions of the EMC directive The technical documentation is kept at the following address Company Ontrak Con
6. Mount STANDARD DIN Rail ONTRAK CONTROL SYSTEMS USB to Current Output 4 20mA 0 20mA www ontrak met H10001 Hole Dia 0 19 Page 17 of 18 ADU 71 User Manual Notes Page 18 of 18 ADU71 User Manual
7. an be set to eight different rates ranging from 1ms to 10 seconds The slew rate is the rate at which the output changes and the specified rate is the time it takes for the output to change from 0 FS to 100 FS The slew rate settings are Ims 10ms Default or power up setting 50ms 100ms 500ms 1s 5S 10s NOU BWN FP OO I To set the slew rate the following command is used SRn Sets slew rate to desired rate n O to 7 Example SR3 Sets slew rate to 100ms The slew rate can be read back using the following command SR Returns present slew rate setting Example SR returns 5 Slew rate is set to 5 seconds 6d Using the Watchdog Feature The ADU71 features a host watchdog function that is used to disable the output current if the host application becomes inactive for a specified time period When enabled the watchdog timer will be reset with every write to the ADU71 by the host software 0 OFF Default or power up setting 1 100ms 2 1s 3 5s 4 10s To set the watchdog operation the following command is used WDn Sets watchdog n 0to 4 Example WD3 Sets watchdog time to 5 seconds Page 12 of 18 ADU71 User Manual The watchdog setting can be read back using the following command WD Returns present watchdog setting Example WD returns 0 Watchdog setting is 0 OFF IMPORTANT 1 When the watchdog times out the ADU71 output current will go to zero and the outp
8. ause a response to be sent from the ADU71 back to the host computer For example if an rd read output current setting command is sent the ADU71 will send back the 5 digit value of the present output current setting To read responsive commands simply click the Receive ADU button and the data will be splayed d Open Close By Vendor Id 0x0a07 Ontrak Control Systems Ine By Product Id 71 PADU By Serial T10002 Open i Show List Device Pipe rd RS 232 Pipe Stream Pipe Capture Stream Data to DataRead txt ViTimeout 500 milli seconds Copyright 2013 Ontrak Control Systems Incorporated www ontrak_net Figure 5 Open Close By Vendor id 0x0a07 Ontrak Control Systems Inc By Product Id 71 By Serial T10002 Open Device Pipe rd gt SendADU OK ig Receive ADU OK 65535 HEX RS 232 Pipe m gt Send 232 Ta Receive 232 Stream Pipe Capture Stream Data to DataRead txt ViTimeout 500 milli seconds Copyright 2013 Ontrak Control Systems Incorporated www ontrak net Figure 6 Sending rd Command Receiving Data These procedures can be repeated using the various commands available on the ADU71 The AduHidTest software is an invaluable tool to allow programmers to become familiar with any ADU product Page 9 of 18 ADU71 User Manual 5 ADU71 Command Summary WRnnnnn WLnnnnn RD SRn WDn STA RST Sets output current to nnnnn and sets range to 0 20mA n
9. e Pipe RS 232 Pipe Stream Pipe Capture Stream Data to DataRead txt MiTimeout 500 milliseconds Copyright 2013 Ontrak Control Systems Incorporated www_ontrak_net Figure 3 Handle Open to ADU71 7 Page 7 of 18 ADU71 User Manual STEP 2 Sending Commands to the ADU71 Once connected you may now send commands to the available pipes on the ADU71 device Pipes are the individual connections to functional sections of the ADU71 The Device Pipe is used to send standard ASCII ADU commands to control the peripherals built into the ADU71 such as the current loop output or the watchdog timer The ADU71 does not use the RS232 or Stream pipes Type wr65535 Enable loop in 0 20mA mode and set current to 20mA into the device pipe send window and click Send ADU An OK will appear beside the Send ADU button if successful and the ADU71 will begin sourcing 20mA at its Loop output terminals Note that ADU commands are not case sensitive By Vendor Id 0x0a07 Ontrak Control Systems Inc O By Product Id 71 ZADU By Senal T10002 Open IC Open Close Close Device Pipe wr65535 m gt SendADU OK Receive ADU RS 232 Pipe Stream Pipe l Capture Stream Data to DataRead txt ViTimeout 500 milli seconds Copyright 2013 Ontrak Control Systems Incorporated www ontrak net Figure 4 Sending wr65535 Command Page 8of 18 ADU71 User Manual STEP 3 Receiving Data from the ADU71 Some commands will c
10. he AduHid DLL requires one of the following Windows operating systems 98SE 2000 XP Vista Windows 7 Windows 8 The programming section of the web site also contains examples for use with various other operating systems and provides details that allow use of the ADU71 without using the Windows based AduHid DLL 2 ADU71 Features eProvides a standard powered current loop output of 4 20mA or 0 20mA e Drives 4 20mA 0 20mA devices or 1 5VDC 0 5VDC or 0 10VDC inputs using external resistors eldeal for controlling variable frequency drives VFD valves etc elnternal isolated 24VDC supply derived from USB bus No need for external loop power supply eProgrammable slew rate from 1ms to 10 seconds eProgrammable host watchdog function eLoop error detection eOver temperature detection e2500V Isolation to loop eBus Powered eHigh retention USB Connector eCE Marked eBi colour LED status indicator eHigh quality cage clamp type terminal blocks eUses standard HID drivers included with Windows 98SE 2000 XP 7 8 32 bit or 64 bit eMini driver DLL provided for use with VB VC NET LabVIEW and TestPoint and others eMeets IEC61000 4 2 ESD protection for USB port eAvailable in flange standard or DIN rail mount Page 4of 18 ADU71 User Manual 3 The ADU71 STATUS LED The ADU71 STATUS LED is a bi colour Red Green led indicator used to identify the current status of the ADU71 USB connection The LED modes are RED ADU7
11. nnnn 00000 to 65535 Sets output current to nnnnn and sets range to 4 20mA nnnnn 00000 to 65535 Returns present current output setting Sets slew rate to desired rate n O to 7 Ims 10ms Default or power up setting 50ms 100ms 500ms 1s 5S 10s NOU BWN FE OO I Sets watchdog n 0to 4 0 OFF Default or power up setting 1 100ms 2 1s 3 5s 4 10s Returns present status 0 Loop Output Disabled Default or power up setting 1 Loop Enabled No fault 2 Slew Active The output is presently slewing 3 Loop is OPEN Fault condition 4 Over Temperature ADU71 core above 150C Resets ADU71 to power on default condition Page 10 of 18 ADU71 User Manual 6 ADU71 Command Descriptions 6a Setting Range and Output Current The ADU71 operates in either a 4 20mA or a 0 20mA range The range is set by the commands used to set the desired output current The current is set using a 16 bit integer number ranging from 00000 O FS to 65535 100 FS The commands to set the output current and range are WRnnnnn Sets output current to nnnnn and sets range to 0 20mA nnnnn 00000 to 65535 WLnnnnn Sets output current to nnnnn and sets range to 4 20mA nnnnn 00000 to 65535 Examples WR32768 Sets range to 0 20mA and sets current to 32768 65535 X 20 10mA WR65535 Sets range to 0 20mA and sets current to 65535 65535 X 20 20mA WL32768 Sets range to 4 20mA and
12. onnected we recommend using the Serial Number to open the handle All ADU devices have their unique serial number printed on the top label When run the AduHidtest Software will display the following window Open Close By Vendor Id 0x0a07 Ontrak Control Systems Inc J By Product Id By Serial Show List Device Pipe RS 232 Pipe Stream Pipe Capture Stream Data to DataRead txt iTimeout 500 milli seconds Copyright 2013 Ontrak Control Systems Incorporated www ontrak net Figure 1 AduHidTest Software Window Page 6 of 18 ADU71 User Manual The Open Close section of the window is where the handle is determined Click on the Show List button to view the devices connected to the USB bus Note Only ADU devices will be listed Figure 2 is the window that appears when the Show List Button is clicked Choose your device The serial number is on the label of the blue box ADU 1 Serial Number T 10002 Figu re 2 ShowList Window The window indicates that there is one ADU71 connected with serial number T10002 Select the device by double clicking on the text ADU7Z1 serial number T10002 The AduHidTest main window will now display the product ID and Serial number Click the By Serial radio button and then click Open to open the handle to the selected ADU71 Open Close By Vendor Id 0x0a07 Ontrak Control Systems Ine By Product Id 71 By Senal 110002 Open Devic
13. oop source for driving 4 20mA or 0 20mA input devices The ADU71 can also be used with external resistors to provide 1 5VDC 0 5VDC or 0 10VDC signals for variable frequency drives valves etc The ADU71 internally generated 24VDC loop supply eliminates the need for an external loop power supply 7a Connecting to 4 20mA Current Input Devices The first connection example shows the correct method to connect a device which has a 4 20mA current loop input Figure 1 shows the correct connections Note that the of the LOOP output is connected to the of the device under control and the of the LOOP output is connected to the of the device under control as shown in Figure 1 USB te Current Gutput 4 2 Arrai weer ora net Serial we Figure1 ADU71 connection to a 4 20mA current loop input device such as a variable frequency drive VFD motor controller If the application requires two current input devices they can be connected in series as shown in Figure 2 di U ONTRAK CONTROL SYSTEMS USB te Current Output 4 7 1 20 aara Spatial Fee Figure 2 ADU71 connections to multiple 4 20mA current loop input devices Page 14 of 18 ADU71 User Manual 7b Connecting to Voltage Input Devices Voltage input devices can also be connected to the ADU71 LOOP output provided the input connections are terminated with an appropriate resistor For 1 5VDC input devices the input should be shunted with
14. sets current to 32768 65535 X 16 4 12mA WLOOOOO Sets range to 4 20mA and sets current to 00000 65535 X 16 4 4mA 6b Reading Output Current The ADU71 output current setting can be read back as a 16 bit number from 00000 0 FS to 65535 100 FS The 16 bit integer number returned represents the current setting and the output current can be calculated depending on which command was used to set the current If the O 20mA range WRnnnnn was used to set the output current the output current setting can be calculated using the following formula nnnnn 65535 X 20 Output Current Setting If the 4 20mA range WLnnnnn was used to set the output current the output current setting can be calculated using the following formula nnnnn 65535 X 16 4 Output Current Setting The command to read back the present current setting is RD Returns present current output setting For example RD returns 32768 If output current was set with the WRnnnnn command output current setting is 32768 65535 X 20 10mA If output current was set with the WLnnnnn command output current setting is 32768 65535 X 16 4 12mA RD returns 12657 If output current was set with the WRnnnnn command output current setting is 12657 65535 X 20 3 86mA If output current was set with the WLnnnnn command output current setting is 12657 65535 X 16 4 7 09mA Page 11 of 18 ADU71 User Manual 6c Setting the Slew Rate The ADU71 slew rate c
15. trol Systems Inc Address City 764 Notre Dame Ave Unit 1 Sudbury Country Postal Code Canada P3A 2T2 Phone Number 705 671 2652 Fax Email 705 671 6127 tom ontrak net Name of Person binding the manufacturer S om Tom Fortin Director Ontrak Control Systems Inc Oct 29 2013 Sudbury Ontario CANADA Page 2 of 18 ADU71 User Manual Table Of Contents What is Included and Where to Start 4 ADU71 Features 4 The ADU71 STATUS LED 5 AduHidTest USB Device Test Program 6 ADU71 Command Summary 10 ADU71 Command Descriptions 11 6a Setting Range and Output Current 11 6b Reading Output Current 11 6c Setting the Slew Rate 12 6d Using the Watchdog Feature 12 6e Using the Status Feature 13 6f The ADU71 Reset Command 13 The ADU71 Connection Diagrams 14 7a Connecting to Current Input Devices 14 7b Connecting to Voltage Input Devices 15 Specifications and Dimensions 17 Page 3 of 18 ADU71 User Manual 1 What is Included and Where to Start The ADU71 ships complete with a 10 USB cable and this User Manual A complete SDK including DLL programming language examples and AduHidtest software is available at http www ontrak net programming htm First time users should first review the ASCII command set for the ADU71 and then use AduHidTest USB test software to become familiar with the operation of the various features of the product Note T
16. ut will switch to high impedance mode To re enable the output after a watchdog timeout occurs use either the WRnnnnn or WLnnnnn command 2 If the host computer goes to sleep and suspends the USB connection the ADU71 will turn off the output immediately regardless of watchdog timer settings 6e Using the Status Feature The ADU71 features a status function that returns a numeric indication of the ADU71 operating status The five operating status conditions are 0 Loop Output Disabled Default or power up setting 1 Loop Enabled No fault 2 Slew Active Output is presently slewing 3 Loop is OPEN Fault condition 4 Over Temperature Fault condition ADU71 core above 150C The operating status can be read back using the following command STA Returns present status Example STA returns 1 Loop is enabled and no fault is detected 6f The ADU71 Reset Command The ADU71 features a reset command than can be used to return the ADU71 to the power on state at any time The reset command is RST IMPORTANT NOTE ADU71 Test Software and V2 0 DLL The ADU71 is a Full Speed USB product and requires the use of the new AduHidTestV2 0 and the Aduhid dll Ver 2 0 or higher The V2 0 DLL and AduHidTest V2 0 Software can be downloaded at http www ontrak net programming htm Page 13 of 18 ADU 71 User Manual 7 ADU71 Connection Diagrams The ADU71 USB to Current Output Interface is a USB bus powered current l
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