USB ANALOG/DIGITAL MULTI I/O-CARD

Transcription

1 Ordering No CON- CFriedrich, Datenblatt_DBD.dot Characteristic features Universal PC Output/Input card For IBM-compatible PCs under WINDOWS Simple connection at the USB-Port 8 digit inputs with pullup protection 8 digital open collector outputs 12 24V 0.5A 4 analog inputs V / 10V / 1k / 10k / 100k 1 analog output V Suitable for DIN rail mounting Typical areas of application Control systems, switchgear cabinet manufacture Building instrumentation, Home automation Analog instrumentation Stepper motor control and actuators I/O-Card for Software PROFILAB Description This is the ideal USB-extension card, if maximum flexibility is required: With 8 digit inputs, 8 digital outputs, 4 analog inputs and one analog output, this extension card is the multi talent for PC-based, analog and digital control systems over USB. All inputs and outputs are terminated at screw terminals and the card is provided with extensive display and checking facilities through LEDs and switches. Therefore, this is also an ideal card for demonstration and training! The digital output of the card is suitable for direct triggering of valves, relays or stepper motor due to application of powerful drivers. Integrated free wheeling diodes enable direct triggering of inductive loads without further protection measures. The status of output is signalled over LEDs. The digital inputs are not galvanically isolated and directly compatible to TTL- or CMOS logic signals. Through the pullup resistance, switch contacts or opto-coupler can be directly evaluated. Low-pass filter and a protective circuit ensures protection against stray signals and transients. The input status is displayed over LEDs. The four analog inputs are adjusted over jumper plugs to match the signal source of V or V. In the 1V range, current signals can also be evaluated over an external 50 ohm shunt. A further speciality is that resistive sensor element like LDRs of NTCs can also be directly connected to the card without additional pre-amplifier. In addition, the sensor element is operated in ratiometric manner over a configurable voltage divider over the reference voltage. For simple offset correction or to test the inputs, there are four potentiometers on the circuit board which can be alternatively connected. Technical data USB Multi I/O-Card Digital Output Digital Input Analog Output Analog input Connection ULN 2003, Open collector driver, max. 24 V, 0,5 A For switch contact, TTL and CMOS compatible, integrated pullup resistance and transient protection V voltage signal, 8 bit 8 Bit, configurable: voltage input V, V; resistance input k, k, k Screw terminals, max. 1.5 mm² pin row connector and RP12 plug PC-connection USB 1.1, compatible to USB 2.0 Operating voltage Application temperature EMV Noise emission Noise immunity Mounting Dimensions V, ext. Power supply C 89/336/EWG EN :2001 EN :2001 DIN rail mounting 160mm x 100mm x 60mm Rights reserved for change in technical data due to technological advancements! Further information at our website:

2 The analog output signal is scaled on V and is available over an operation amplifier buffered at the output. Here also, a simple test is possible: The light intensity of LED changes proportional to the consumed voltage. The standard rail housing of the card can be directly installed in the switchgear cabinets. The connection is through the USB-Port of PC (USB1.1 specification, 2.0 compatible). Safety instructions The product should be installed and used only according to the intended application. The I/O card may also contain voltage over 24 V depending on the external circuit involved. Contact with live voltage parts leads to fatal dangers. Therefore, fitment and maintenance of the card shall be carried out by only trained personnel. The USB card must be assembled inside a switchgear cabinet or in a fully closed plastic housing. Mounting and servicing operations should be carried out only after switching off the voltage. Touching the electronic components in switched off condition should also be avoided. Electronic components can get damaged due to electrostatic discharge process. The product is not meant for controlling electrical systems which perform safety related functions. In normal operation also, there is always a danger of malfunctioning due to any fault or failure of the control system itself (PC) or e.g. due to any inherent software error of the control program. The user has to ensure that there are no consequential damages due to malfunctioning or undefined switching status of the relay. This is all the more possible, if heavy loads like heaters or motors are triggered. Due to wrong tightening of screws of the connection terminals or by use of inappropriate tool, the terminals can get damaged because of which the insulation or the contact can get disturbed. Badly connected leads can come out during operation and cause a serious risk to safety. Due to contact resistance at terminal connections, there can be increased heat generation which can cause fire. Wrongly wired connections can destroy electric components and cause other damages. Accessories As accessories, a matching USB connection cable and also a power supply unit (Standard 12V/630mA) are available. For safe operation, the PCB should be placed in a suitable housing (e.g. Ordering No. GEH-REL). The I/O module is compatible with the software "Profilab" with which regulation and control programs can be created under graphical environment without any programming knowledge. Installation System requirements: Operating system Windows 98, 2000 or XP. USB-connection 1.1 or higher, CDROM-drive, 64 MB RAM (XP: 128 MB), minimum 2 MB free hard disk space. For a first test of the card, the input and output terminals can be left unwired, as the I/O status is also indicated over the LEDs and the input can be set over the switch. The current supply of the USB part is through the interface and supply to the outputs is from the external power supply unit. The integration to a PC is over a standard connection cable directly to the PC. The USB connection corresponds to specification 1.1 and is compatible to 2.0. During first time connection to the PC, the standard windows dialogue box starts for driver installation. Install the required device driver, by manually selecting the device driver in the Hardware assistant. The driver files are on the CD in the folder "\Driver\EZUSB\Driver_XP_2K" (for Windows 98, it is in the directory Driver_98). After this, install the software USB-Tools. This is on the CD under the directory \Software\USB\USB-Tools. This software is required for testing the card and setting the card number. Now start the software USB-Tools. In the application window, the connected I/O card with the description and card number appears. By double clicking on the device description, a window opens up in which you can test and also configure various functions of the card. Settings Card number: If you are operating only one card on the PC, then you don't need to do any settings for this. However, up to 32 USB-cards can be operated on a PC. For operating multiple cards, a unique card number must be assigned to each card. For this, the card is to be connected to the PC and the write protection jumper connection WP is to be closed with a shorting plug. The assigning of new card address is done with the corresponding dialogue box in the window of USB-TOOLS. Page 2

3 In order to complete the process, the program must be terminated and the card should be taken out of the USB port, so that further new numbers can be released. On the next start, the card is recognized with the new card number. In this way, proceed with all the cards, which are to be operated with the PC. Don't forget to remove the write protection jumper again, in order to protect the card from inadvertent overwriting. al test: All the functions of the card can be tested with the help of the software USB- TOOLS. Duly consider the limiting values provided in the data sheet while wiring the inputs and outputs. The card can get damaged due to wrong wiring and connection to high voltage! Since LEDs and jumper plugs are available on the card for all inputs and outputs, you should not connect any external components for the first test. Testing the digital output: The functioning of digital output can be cross checked in the application window of USB Tools by activating/deactivating the white check box under the corresponding output. The corresponding LED must glow on the card and the associated OCoutput is connected against ground. By selecting the relay control mode and time duration, the output can get connected across automatically. Testing the digital input: The functioning of digital inputs can be cross checked by switching the input against ground with the DIL switches. The LED of the associated input glows on the card and in the application window of USB Tools, the red signal with respect to the input changes to green. Testing the analog input: For this, the jumper plugs must be inserted in the outer position (11-12 potentiometer) for configuration of the inputs. Select the input configuration to 0 in USB-TOOLS. Now you can separately adjust the value for each channel at the potentiometer. The measured value is displayed in USB-Tools. Testing the analog output: In USB-tools, the desired output value can be adjusted at the slide "DA converter". The LED glows with the light intensity proportional to the adjusted value. At the output terminals, the voltage value can be measured on a scale of V. Software The scope of supply includes extensive documentation and USB driver, a free ware DLL with programming examples. Documented source code in C, Delphi and Visual Basic enables the programmer to integrate in his own control software. Configuration tools help to define the card address and testing of components. Software Profilab With this software, available as accessories, professional grade measuring systems and control projects can be developed in a simple, graphics based development platform. The measurement circuit is to be simply drawn to create a project. Without any programming knowledge, the status of I/O-Module can be applied in the project. Arithmetic and logical building blocks take care of the linking and processing of input values. The system is operated through a self designed virtual front panel, on which switches, potentiometers, displays, LEDs, instruments etc. are arranged. The software also provides facility of compiling the project into an EXE file which can run without PROFILAB. Page 3

4 Input circuit The inputs are not galvanically isolated and compatible to standard CMOS or TTL-signals for 3.3 V or 5V voltage level. Through the pullup resistance (22k), ground reference switch contacts or opto coupler can also be evaluated. The input is protected against transients with series resistance and clamping diode. However, voltages over 5 V DC or high energy transients can damage the input! The 5 V voltage at the input terminals from external power supply unit is stabilised at the circuit board and is made available at the screw terminals. Output circuit The output is directly controlled from an integrated driver unit ULN 2803, which switches against ground. The data sheet of the component is available on the CD in the directory "\PDF. It can be operated with only DC voltage of up to 24 V DC. The driver is not protected against short circuit and can get damaged on overload. The maximum output current for each channel is 0.5 A. The cumulative current of all channels should not exceed 1 A, otherwise the voltage supply of the actuators must be externally blocked. The external power pack must be able to supply the operating current for the connected load. In case of external connection, the overall current should not exceed 3 A based on the layout of the printed circuit board. The 12 24V voltage from external power supply unit which is also made available at the output terminals, is provided with a series connected reverse polarity protection diode. The ground terminal GND is connected to the PC ground and also to the ground of external power supply unit. Analog Input Four input channels are available. The operating voltage 5 V and V and two input channels (1.3 as well as 3.4) are made available at the RJ 12 socket. The three pole terminal connector are laid out parallel to RJ12 socket with one channel and V operating voltage. The analog inputs can be made compatible to a wide variety of sensors and industrial measuring probes through a row connector. In order to also use resistive sensors as measuring probes, there is an option to apply the reference voltage over a attachable pre-resistance at the sensor, which works as a ratiometric voltage divider. RJ 12 socket layout Pin Description 6 +5V Operating voltage 5V 5 +12V Operating voltage 12 24V 4 AIN_y unoccupied 3 AIN_x Input evaluation 2 GND Device ground 1 GND Device ground/shielding View of the connection socket: Page 4

5 Layout of terminal strip Pin Description 1 +12V Operating voltage 12 24V 2 ANA Input evaluation 3 GND Device ground View of contacts in socket: Hint: The connector Pin 1 ( +12V) is connected with the external supply voltage. If the board is powered with 24 V, the voltage at this Pin is also 24 V. The analog input is to be configured over jumper plugs for different type of applications: Pin Description 1-2 RIN 100k Divider resistance for impedance measurement upto 100k 3-4 RIN 10k Divider resistance for impedance measurement upto 10k 5-6 RIN 1k Divider resistance for impedance measurement upto 1k V Voltage input V V Voltage input V Potentiometer Test and simulation (1-2) RIN 100k: Impedance input 100 k: All such components are suitable as sensors, in which the resistance value changes as a function of the measured parameter, e.g. LDR's (photo resistors) or NTC's (temperature sensors). The sensor is connected with a resistance value of kohm at the input socket between ANA and GND. (3-4) RIN 10k: Same as (1), however for sensors with resistance value k (5-6) RIN 1k: Same as (1), however for sensors with resistance value k (7-8) V: Voltage input V for industrial transducer with voltage output. The measuring probe is connected at the input socket between ANA and GND. Measurement of current signals 0(4) ma is also possible over a 50 Ohm shunt. (9-10) V: Same as (4) however with voltage input 0..1V, (11-12) Poti: Potentiometer for Test and for Simulation, positioning during despatch. In order to measure values of measuring probes with current output, a shunt (instrument grade resistance) of 50 ohms can be connected at the input and configuration V can be selected. The voltage and resistance measuring range are short time protected against over voltage. External connected high voltage can lead to failure of components. At pin 5 of RJ12 socket, 5V operating voltage is available for supply to external measuring probes. The voltage is stabilised and short circuit protected in line with specification for integrated voltage regulator 78L05. The maximum current consumption should not exceed 50 ma in total. Presence of external voltage leads to damage of components! At pin 4 of RJ12 socket, operating voltage from external power supply (12 24V) is available for supply to external components. A short circuit proof power supply is recommended for the application. Accessories Accessories USB Connection cable Plastic housing Power supply unit 300mA Software Profilab Ordering No. KAB-USB-AB GEH-REL NG12V-HG SOFT-PROFILAB Page 5

6 Layout of USB-Socket (Type B) Power supply DC 12 V Inputs Digital Inputs PIcture Pin 1 +5V 2 Data 3 Data + 4 Ground Centre pin Operating voltage V DC, Outer terminal GND +5V Ext. Operating voltage 5 V I0 Digital Input, Bit 0 I1 Digital Input, Bit 1 I2 Digital Input, Bit 2 I3 Digital Input, Bit 3 I4 Digital Input, Bit 4 I5 Digital Input, Bit 5 I6 Digital Input, Bit 6 I7 Digital Input, Bit 7 GND Reference potential Outputs Digital Output GND Reference potential OC0 Digital Output, Bit 0 OC1 Digital Output, Bit 1 OC2 Digital Output, Bit 2 OC3 Digital Output, Bit 3 OC4 Digital Output, Bit 4 OC5 Digital Output, Bit 5 OC6 Digital Output, Bit 6 OC7 Digital Output, Bit 7 +12V Ext. Operating voltage 12 24V Analog Output AN_OUT GND Analog Input Analog output V Reference potential +12V Ext. Operating voltage V ANA_ GND Analog Input pin, with ref. to ground Reference potential The ground terminal GND is connected to the PC ground and the ground of external power supply. Page 6

7 USB Interface Analog Input Page 7

8 Digital Input/Output Analog Output Page 8