High Current Output Signal Converter (HCOSC) User Manual
Contents
1. no effect on the output due to the high impedance connection This provides a way for the output micro to monitor the control circuit even when disconnected and act accordingly Relays 1 and 2 can be set up for various alarm conditions the relay outputs are specified at 30 VDC up to 1A The digital input is an opto coupled input at 9 to 30 VDC and can be used to reset alarms and to provide some output control functions and the interlinking of units in Follow Me mode The Feedback output is designed to output 4 20 mA or 0 10 V which is in proportion to either the output current or output voltage DIP switch selectable This output is galvanically isolated from the input power supply output and communications The RS485 communications is register based using our simple ASCII RMF protocol with Modbus also available The Alarm Relays and Alarm LEDs are configurable and can be set up to switch low to high or high to low and can be normally open or normally closed The LEDs can be used to indicate Alarm Relay status in either normally open or normally closed configurations The Alarm LEDs will flash at different rates to indicate which alarm is active during the Alarm delay time if selected Alarm values and various settings are user configurable using DIP switches and single push button PB capture function The Input LED can be configured to provide a quick indication of the input signal state off slow flash on and fast flash Input LED2. values can be setup by injecting and using the single push button PB capture function Dither control is provided for Hydraulic Valve applications Adjustable frequency from 50 to 800 Hz and amplitude adjustable from O to 20 of output range using front panel trimpots An output control relay is included for fail safe applications so that the two or more controllers can be used in parallel with the facility to isolate the output in the event of a module failure Will be nice to have a USB connection on the front of the unit to be able to upload new firmware and to plug in a PC or configurator could be a Bluetooth gadget or wireless to link to an Ipad or phone app Filename Filename High Current Output Signal Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 6 of 8 Parallel Redundancy and Fault Monitoring this needs more detail and diagram revisions and diagrams showing the connections for each mode To provide proper parallel redundancy we incorporate some self monitoring for each device and the ability to be able to self disconnect If we look at the possible failure modes which can be acted upon they are No current output fi Galvanic Max current output Micro Isolation o Controller Short circuit AOST Oscillating or variable current output We also include internal output current and voltage Hydraulic l vake feedba
3. 1 4QU Fax National 011 7924687 United Kingdom e mail sales danntech com Tel 075 9069 1824 P O Box 1023 Fontainebleau 2032 e mail sales danntech com Republic of South Africa www danntech com www danntech com Danntech makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Danntech shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material This document contains proprietary information which is protected by copyright No part of this document may be photocopied reproduced or translated into another language without the prior written consent of Danntech The information in this document is subject to change without notice Filename Filename High Current Output Signal Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 8 of 8
4. Filename High Current Output Signal Converter User Manual docx Version 0 a Date 02 October 2014 High Current Output Signal Converter HCOSC User Manual This document is in process of being written and will be updated when the units are available We have been manufacturing various devices used for control of hydraulic valves and this is the recent revision specifically designed to incorporate all the features required in a modern hydraulic valve controller The unit comes in several different models and is designed to provide either a linear voltage or current output of up to 24 V at up to 350 mA or 12 V at up to 1 25 A The output can be either constant voltage or constant current which is user configurable Using multiple powerful internal processors we can adapt some of the features to suit specific applications Main features z EF High speed step response less than 1 mS b DITHER man Various process signal inputs direct resistance joystick connection E rer Fi High speed ModBus connection for integration into control systems 7 Sg Multi way isolation between input output power supply communications r feedback digital input and relay outputs Compact DIN rail mounting a model with ruggedized aluminium IP66 enclosure for mobile applications will be available in the future or on o 8 ig E demand 4 All controls can be adjusted on site using front panel trimpots and the
5. O to 20 this is a taddition so that the average output remains as set P6 Dither Frequency adjustable from 50 to 800 Hz P7 fF FF Seven trimpots which can be locked or unlocked by dipswitch Filename Filename High Current Output Signal Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 3 of 8 Front panel LEDs Power In Status green LDS Input yellow LDI Output bi colour bargraph Relay 1 orange Relay 2 orange Digital Input yellow Ramping Up orange inside output bargraph Ramping Down orange inside output bargraph USB Comms Activity blue Isolating relay state bi colour led Red Green Over temperature red amp t amp amp amp amp t FF There will also be a recessed push button for configuration Power in and Status of Input normal running POWER Off input lt minimum input value mode IN INPUT 4 Slow flash input lt low value O On input low lt input lt input high SETPOINT Fast flash input gt input high value g D 7eROW RELAY Status of Relay 1 Trimpots to make IMAX various manual SPAN RELAY2 adjustments A Status of Relay 2 Can be locked RAMP by means of DIP switch UP beneath side cover DIN RAMP DOWN A Status of Digital Input a lt lt Over Temperature USB communications j n a shutdown indication activity indication o USB s dno wa
6. al Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 5 of 8 How it Works The rear backplane connector can be used in future options for CAN Bus or TTL RS232 multi drop communications where several units are used in conjunction with a RMF Controller to co ordinate the communications The RMF controller can communicate using RS485 RS232 or USB and later we can include an Ethernet interface This design version has dual processors to be able to provide all the required features with a suitable response time Micro Controller 1 will do the input control and communications passing only an output value to Micro Controller 2 Micro Controller 2 the output controller will do the ramping dither output control output feedback over temperature control output monitoring and fault monitoring functions We have added a hardware watchdog which requires a regular pulse from each of the micro controllers to keep the watchdog happy and the output relay enabled In addition to the hardware watchdog each processor will also have internal watchdogs which will reset the processor should anything disrupt the code execution The hardware watchdog is a last resort function to ensure that a malfunctioning unit disconnects itself from control circuit The output feedback is also an addition and this is a high impedance amplifier interface to the output designed so that a failure of this amplifier can have
7. ck and an output relay then the firmware can incorporates some safety features The alarm relay can Galvanic Micro Isolation I Controller E indicate the of module health for an external controller So version VO 1 of parallel redundancy is as follows The units can run as follow me where there is a master and a slave The master provides all the current and does all the control while the slave just monitors the input and the voltage output using hiZ feedback and the All Good relay on 5 amp 6 of the master The master is configured so that if the digital input goes low then the isolating relay opens The slave RL2 output is connected to the digital input of the master so it can open the master isolating relay if necessary the sense of these things can all be inverted if required The slave takes over all functions and sends an alarm opens its RL1 to alert the system that there has been a failure and the master needs replacement In autonomous mode each unit operates independently and monitoring and safety is done by a supervisory system In autonomous mode If all is good as determined by micro 2 RL1 is closed isolating relay closed RL2 does alarm and warning functions Digital input activated can be set high or low causes isolating relay to open and all that goes with that It will be nice to have a direct indication of the status of the isolating relay This drawing nee
8. ds more info added to show how the unit can work together Watchdog The watchdog is included to ensure that if any of the processors stop working or if the digital input dictates the unit to stop then the watchdog automatically will open the isolation relay and disconnect the output from the load This will ensure that the units can be used in a parallel redundant mode in master slave configuration or independently Inputs 1 Power supply detected 2 Input processor is alive toggle detect 3 Output processor is alive toggle detect 4 Input processor digital input 5 Output processor digital input 6 External digital input can be 1 healthy or inverted O healthy or disabled Filename Filename High Current Output Signal Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 7 of 8 Will probably be good to have a power up delay built in Where all is assumed to be good and output connected by default Can be say for 100mS to allow all the inputs to become stable Alternately the isolating relay can be kept open for the power up delay so as to keep disconnected from the load until everything has settled think use a simple 14 or 16 pin PIC to do this function danntech ce danntech ltd Reg No CK1986 15338 23 Co No 6510211 Tel International 27 11 7921239 15 College Close Hamble le Rice Tel National 011 7921239 Southampton Hampshire Fax International 27 11 7924687 S03
9. n locked with side access DIP switch Very many settings can be selected using DIP switches without the requirement for PC software Unit can also be completely configured using the USB connection and configuration software Completely configurable Designed for parallel redundant operation either in a Master Slave configuration or using an external supervising controller Filename Filename High Current Output Signal Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 1 of 8 Basic Design Philosophy This device is an upgrade of the device we have made for some years which was actually crap The firmware in the old one was crappy This new design has been changed to cater for Signal Conversion with higher output current and voltage as well as Hydraulic Valve Control The primary design is focussed on the hydraulic valve application have done the design so that all the basic setting can be configured by an enlightened user in the field following instructions in the user manual without any fancy equipment PC IPad or smartphone configuration will also be possible using the USB interface later this will enable more complex setup to be done where DIP switches and LEDs are unable to provide all the features or are too complex to use To put into context the various offerings we have and need please see the document Current Output Signal Converter Range i e not switched m
10. ode or pulse output type General Description This unit is designed to provide either a linear voltage or current output of up to 11 V I think this may need to be able to be higher at up to 30 V for 24 V solenoids and currents up 350 mA I don t think that we can fit on two of these DC to DC converters The output can be either constant voltage or constant current which is user configurable Inputs and Outputs Standard inputs which are DIP switch selectable are 4 20 mA 0 20 mA 0 100 mV 0 1 V 0 10 V 0 100 V 1 V 10 V others possible and you can calibrate to any values within each standard range Resistance up to 10 kQ user rangeable Standard outputs DIP selectable are 4 20 mA 10 mA 50 mA 100 mA 250 mA 350 mA General Description The unit is delivered as required on order but almost all the input output alarms and LED functions are user configurable using DIP switches and single push button PB In the future we will also provide a software interface or a small configurator which can be plugged into the device to make configuration quicker and easier Input ranges can be set up using DIP switch selection and then can be re ranged anywhere within the selected range using the push button is used to capture the desired input minimum and desired input maximum You can of course just use as delivered or by selecting any of the preset configurations Input resolution 16 bit may be 24 bit Output res
11. olution 16 bits Step response of 2 mS or less 500 Hz Four way isolation of up to 1000 VDC between input output auxiliary power supply and communications if fitted The output can also be ranged to suit the user application using two trimpots and the push button used to capture the desired output settings or it be simply used as configured for delivery or using any of the presets Devices can be connected up in parallel or series to provide higher output currents or voltages and parallel redundancy if required Filename Filename High Current Output Signal Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 2 of 8 Power loss for a converter at 6W minus load power so for a 100 load at 250mA 6 0 625 5 3W for 400 load at 250mA 6 2 5 3 5W In the case of higher voltage output parts say 30V maximum for OPA541 then max heatsink power dissipation can be 12 W 10 Vx 4 A High quality plug in screw terminals which can accommodate wire 2 5m cross section Dimensions Width 45mm Height top to bottom 110mm Depth off rail from chassis plate to front 125mm Current requirements are 300mA max at 24VDC supply with some switch on surge we don t know this yet but my guess is around 500mA for a few milliseconds We have an internal time delay fuse soldered on PCB so external fusing is not needed This functional diagram will be updated with the final documenta
12. tion High Current Output Signal Converter Functional Diagram V2 20 ha FBOUT FBOUT n a 15 Data 1 0 16 Data 9 4Vin Feedback Fak A USB R5485 Power In Output 6 6 RL STATUS ee Power 15VDC PE touns nu for Loop w STATUS DC DC DEDE F Powered ye Avi Converter Converter ge eos Sensors a Output Feedback Hardware Config DIP Current ___ Switch 8 SW1 Source Sa u l Voltage Feedback lt Micro N Micro S Controller 1 Controller 2 a IH 4 ih l n put Current Feedback Input Signal Conditioning Isolating Setpoint Dto A Relay nverter o z z T OUT Bias Zero j Hardware O B murs is Watchdog utput Timer Hardware Imax Span f Switches PB Config 8 2 SW1 2 Switches ry 8 SW4 Ramp i Down ik ne aon L Dither siy Frequency he gt Ampia 4 I Powerin Digital 11 DIN input 12 DIN Trimpot Controls Setpoint for applications where a fixed variable setpoint is used to control the output Bias to adjust the zero output value AKA Zero P2 Imax to adjust the maximum output current AKA Span P3 Ramp Up controls the ramp up time range selected using DIP switches off 0 1S 0 10S 0 100S Ramp Down controls the ramp up time range selected using DIP switches off 0 1S 0 10S 0 100S Dither Amplitude controls the amount of dither added to the output signal
13. ung ybiH uhi LED bargraph red green orange to i indicate output value alarm levels and other yssu USB connector to provide connection for PC configuration and or A iG J MOPPING output health related information Output Isolation Relay Status iin Green Relay Closed Output Connected A ISOLATION _ y RELAY Red Relay Open Output Disconnected Recessed Push Button PBN Switch for manual configuration and capturing of injected calibration values Filename Filename High Current Output Signal Converter User Manual docx 02 October 2014 Version 0 a danntech PROCESS INSTRUMENTATION Page 4 of 8 Versions Models Basic Model Plug In Screw Terminal Top Front 4 input O Relay 1B a aa Relay 1 A a a Output Po Output Plug In Screw Terminal Bottom Front Rear Backplane Bus Connector for Multi Drop Plug In Systems Enhanced Models includes two additional plug in screw terminals 9 Feedback Plug In Screw Terminal Top Back ei ps Relay 2 B e Relay 2 A Plug In Screw Terminal RS485 Bottom Back RS485 Power Output and Power Supplies input Output Output DC to DC Converter Input DC to DC Converter 9 36VDC 180 mA 12 V 1 x TRACO TEN 5 2423WI 9 36VDC 180 mA 25 V 2 x TRACO TEN 5 2423WI 18 36VDC 380 mA 12 V 1 x TRACO THD 12 2423 Filename Filename High Current Output Sign
Download Pdf Manuals
Related Search