MCQ Data Aquisition Board. Preliminary Datasheet

Transcription

1 MCQ Data Aquisition Board Preliminary Datasheet

2 Technical Data Sheet Specifications: Resolution: Max 24-bit Number of Channels: 8 Max Max Sampling Rate: from 50 Hz to 2 KHz programmable for each channel. Data acquisition from your own sensor up to 8 sensors, with Sensor Board. Ideal for OEM applications. User interface with 3 push-buttons and 4 LED Low cost. Power Supply: V AC/DC USB interface Modular Architecture I2C BUS with build-in drivers for: Sensirion SHTxx series (Temperature/Relative Humidity) Sensirion SDP600 series (Differential Pressure) 4 digital input (Normally Open) 2- channel PWM for valves and actuator control 2 programmable analog output channels (0-5V), Max 80 ma Firmware Update from USB. Easy integration and communication with all MCQ Instruments products to make Custom Solution for laboratory uses. 485 BUS with open propetary protocol. The MCQ Data Acquisition Board is designed to provide a complete data acquisition solution for test and measurement applications and control several kinds of actuators. The MCQ Data Acquisition Board can collect data from 8 different sensors with an optional signal conditioning daughter card called Sensor Board. The Sensor Board is easily adapted to different sensors granting the maximum sensor performances and allowing test automation and control, calibration processes and the possibility to store all results. All this features make this Board ideal for OEM applications 2/10

3 TECHNICAL SPECIFICATIONS Input Range mv, V, +2.5 V, ±625 mv, ±1.25 V, ±2.5 V Resolution Max 24 Bit Number of Channels 8 Sampling Rate Power Supply User Interfaces from 50 Hz to 2 KHz programmable for each channel V AC/DC 3 push-function button and 4 LEDs Connectors Interfaces Slot for custom daughter board Sensor board 4 digital input (Normally Open) I2C BUS with build-in drivers for: Sensirion SHTxx series (Temperature/Relative Humidity) Sensirion SDP 600 series (Pressure) Other I2C Devices on request USB PC Interface 485 BUS with open propetary protocol 2 PWM channel for valves and actuator control 2 programmable output analog channels Analog Output (0-5V), Max 80 ma Output Signal Digital: 485 BUS with open propetary protocol 3/10

4 Connections: The image below illustrates you the interfaces and connections of the Board. 12 Power 13 Actuators 14 Flow 15 USB 16 Connectors Control Connector 485 Connector 17 Firmware Update Connector USB Led Programmable Led Power Led System Programming Led 5 Reset 6 Programmable Switch 7 Programmable Switch 8 I 2 C Connector 11 Sensor board connectors 10 Microcontroller 9 Digital Input 4/10

5 Digital Input: 4 digital inputs for external communication with external devices or external switches or remotes. The digital input channels of DATA Acquisition Board are TTL and CMOS compatible. DIGITAL INPUT 4 - DIGITAL INPUT 3 - DIGITAL INPUT 2 - DIGITAL INPUT 1 + Digital Input Circuit: The digital input circuits have a 10 KOhm pull up resistor to 3.3 Volt, as illustrated in the figure below. This forces the digital inputs to be normally high, and allows contact closures to be connected directly between the digital input channels and which will pull the channel low when contacts are closed. Digital Inputs are reverse voltage protected, and protected against over voltage with internal CLAMP DIODES DVDD_3.3V D4 Connection: 4.7K R1 Diode TVS DIN1 + DIN2 + DIN3 + DIN X C1 D1 D2 D3 R3 R2 4.7K 47K C2 TO MICROPROCESSOR DIN pF 100pF 5/10

6 Actuator Input: ANALOG OUTPUT 2 (PUMP) + ANALOG OUTPUT 2 (PUMP) - - ANALOG OUTPUT 1 (PUMP) + ANALOG OUTPUT 1 (PUMP) - PROPORTIONAL VALVE 2 (PWM) + PROPORTIONAL VALVE 2 (PWM) - PROPORTIONAL VALVE 1 (PWM) + PROPORTIONAL VALVE 1 (PWM) - Proportional Valve 1 & 2 PWM Output 0-10 V, with PWM frequency selectable from 1 KHz to 20 KHz Proportional Valve 1-2 can be used with any actuator requiring PWM input. Proportional Valve 1-2 can be also used to control solenoid valves (ON-OFF) with LOW STATE = 0V and HIGH STATE = 10V Max current for each channel: 150 ma Analog Output 1 & 2 0 5V Analog Ouput for analog actuators and analog controlled devices (diaphragm pumps and other analog devices) Analog Outputs can be also used to control low voltage solenoid valves (ON-OFF) with LOW STATE = 0V and HIGH STATE selectable by user in the range 0-5V Different upper range is possible upon customer request ( max 10V) Max current for each channel: 150 ma 6/10

7 Power Supply: DC IN 2 (12-24V) DC IN 1 (12-24V) The Data Acquisition Board requires a DC supply in the range V. Min current supply: 600 ma. DC Input is not polarized. Internal Diode Rectifier provides the right polarization. Power Supply + and - could be connected indifferently to each position of the connector. Fast DAC Output: DC IN 2 (12-24V) DC IN 1 (12-24V) Output non-implemented in the current firmware release. For future use (e.g. sound alarms or piezo actuators). 7/10

8 BUS RS 485: DC OUT - (10V) DC OUT + (10V) RS B RS A Flow Board can assume both MASTER or SLAVE rule in a MASTER/SLAVE environment. Proprietary BUS protocol provides fast and secure communication between each MCQ Instruments device. Flow Boards, Acquisition Boards and Gas Blenders can be connected togheter with a maximum number on each bus of 64 devices. One MASTER is required on each BUS. MASTER device provides with BUS setup function a scan of the BUS network searching for connected SLAVE devices (each SLAVE device must have a unique address in the range 11-74, Address 10 is reserved to MASTER device). Once scan is complete, MASTER device stores in non-volatile memory the bus configuration with addressed and rules. On restart MASTER will provide BUS monitoring and it will be able to detect a failure of each of the SLAVE device, reporting it as an alarm. In this case MASTER will continue to communicate with all other remaining devices. For more information contact support@mcqinst.com For details of 485 BUS protocol functions, download document Communication Protocol from our website. 8/10

9 I2C BUS: I2C SCL VDD 3.3 V I2C SCK User can connect via I2C various sensors using this protocol. The flow board can supply 3.3V DC with a maximum current of 100 ma MCQ Instruments periodically develops drivers for various third-part sensors like Pressure sensors, Relative Humidity and Temperature sensors, etc. Flow Board actually includes drivers for the following sensors: 1) Sensirion SHTXX series Relative Humidity and Temperature 2) Sensirion SDP600 series Differential Pressure Other drivers can be developed on request. For more information contact support@mcqinst.com 9/10

10 Contact MCQ Instruments MCQ s.r.l. Via delle Quattro Fontane, Rome - Italy Phone: Fax: info@mcqinst.com support@mcqinst.com 10/10