MR-BusIO-MAINTM BusIO MAIN BOARD (10-PIN MRconnect User Manual (c) ready) GRAVITECH.US uResearch GRAVITECH GROUP Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US MR-BusIO-MAINTM BusIO MAIN BOARD (10-PIN MRconnect User Manual Description The MR-BusIO-MAIN is an experiment board which receives output signals from any microcontrollers. The signals then distribute to daughter boards for each experiment. It designed to connect directly with 10PIN MRconnect(c). It is a quick and easy way to control up to 8 daughter boards. The MR-BusIO-MAIN can receive 3 types of input: from 8-bit port of any microcontrollers to the board directly (10PIN MRconnect(c)), from I2C bus through PCF8574 Expansion Port IC (optional), or from 34-pin header that have jumpers to select which pins to use to control the daughter boards. The block diagram in Figure 1 show the structure of the I/O pins for MR-BusIO-MAIN board. (c) ready) Interfaces I2C: When using I2C interface, user must connect PCF8574 IC on to the board. The jumpers to configure I2C address must be set to appropriate setting base on the user code. In the event of user want to switch to use different input type, i.e. 10PIN MRconnect(c), user MUST remove PCF8574 IC before attempt to connect. 34-PIN Header: When using 34-PIN header, user must assign jumpers to select which port pins to use. There are three ports available to use A, B, or C. User can only select from one port. 10-PIN MRconnect(c) 10PIN MRconnect(c): I2C (Optional) When using 10PIN MRconnect(c), user can connect directly to 10-PIN header without configure any things. 34-PIN Header FIG1: System block diagram Power: There are three ways to connect to the board. User must choose only one way to connect. The signals then route to IO0IO7 for all 8 daughter boards. PCB size is 6.0" x 3.5". The card can be power by using the power from the 10PIN MRconnect(c), 2-PIN header, pin 25 from 34-PIN header, or external 2.5mm, center negative, 916VDC wall adapter or pin 10 on I2C input header. When using external power supply, make sure it is +5VDC. Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US MR-BusIO-MAINTM BusIO MAIN BOARD (10-PIN MRconnect User Manual FIG 3: MR-BusIO-MAIN Board Layout FIG 4: MR-BusIO-MAIN Schematic Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US (c) ready) MR-BusIO-MAINTM BusIO MAIN BOARD (10-PIN MRconnect User Manual (c) ready) 10PIN MRconnect(c) Pinout: P0 P2 P4 P6 VCC P1 P3 P5 P7 GND FIG 2: 10 PIN MRconnect(c) Daughter Boards * Experiment board for buzzer output. The input signal is isolated from buzzer driver circuitry by PC817 Photo-coupler IC. All of the accessories are available for purchase via our website. If you don't see the item you need, please contract our sales department at sales@gravitech.us * MR-BusIO-BUZZER MR-BusIO-ACIN Experiment board for receiving 110220VAC input and translates into TTL 5VDC level. It is using PC817 Photocoupler IC to isolate high current and low current. It is best for monitoring the present of AC voltage. * MR-BusIO-DCIN Experiment board for receiving 5V, 12V or 24VDC input and translates into TTL 5VDC level. It is using PC817 Photocoupler IC to isolate high current and low current. It is best for monitoring the present of DC voltage. Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US MR-BusIO-MAINTM BusIO MAIN BOARD (10-PIN MRconnect User Manual * MR-BusIO-DCOUT * Experiment board for switching DC output voltage by using NPN Power Transistor 2SC1061. The advantage of this transistor is VCE(sat) = 1V (max.) at IC = 2A and IB = 0.2A. The output DC voltage is switching ON and OFF by TTL level 5VDC. It is using PC817 Photo-coupler IC to isolate high current and low current. It is best for controlling DC voltage for up to 50V at 3A. * MR-BusIO-PHOTORELAY Experiment board for switching output by using AQV210E IC, PhotoMOS Relays. PhotoMOS Relays combined advantage of solid state relays and mechanical relays together, so efficient is perfect and better than other devices. The maximum peak value at the load is 350V, 130mA for both AC and DC. ready) MR-BusIO-RELAY Experiment board for switching AC or DC output by using mechanical relay. The maximum controlling voltage is 250VAC at 5A or 24VDC at 10A. It is using PC817 Photo-coupler IC to isolate high current and low current. It is best for switching output load. * MR-BusIO-SSRAC Experiment board for switching AC output voltage by using SSR (Solid State Relay). SSR is similar to mechanical relay that consists of inductor and surface contact. The internal structure of SSR uses semiconductor material to switching ON and OFF. The maximum controlling voltage is 400VAC at 6A. It is best for switching AC output voltage. Copyright (c) 2007 MicroResearch GRAVITECH GROUP (c) WWW.GRAVITECH.US MR-BusIO-MAINTM BusIO MAIN BOARD (10-PIN MRconnect User Manual * MR-BusIO-SW Experiment board for receiving input from push button switch. When the switch has been pressed, the indicator LED is illuminated and status on I/O pin is LOW. Moreover, user can add DS18S20 IC, 1Wire Digital Thermometer onto the board. It can send the temperature value via 1Wire bus system to microcontroller (optional). It is best for sensing switch input and temperature reading. Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US (c) ready) MR-BusIO-MAINTM BusIO MAIN BOARD (10-PIN MRconnect User Manual (c) ready) Notes Contact Us We maintain a website where you can get information on our products, obtain literature and download support files. Visit us online at: WWW.GRAVITECH.US For sales questions or to place and order, direct your e-mails to sales@gravitech.us. Refer to our website for product pricing, shipping rates, payment instructions, and for other info we need to complete your order. Use our online Forum or e-mail your technical support questions to support@gravitech.us. We try to respond to your questions the same day. Disclaimer: MicroResearch reserves the right to modify its products or literature, or to discontinue any product at any time without prior notice. The customer is responsible for determining the suitability of any device for any application developed using MicroResearch components. Copyright (c) 2007 MicroResearch GRAVITECH GROUP WWW.GRAVITECH.US Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Gravitech: MR-BUSIO-MAIN