/ declared. 1.2 Registered trademarks TQ-Systems GmbH aims to adhere to the copyrights of all the graphics and texts used in all publications, and strives to use original or license-free graphics and texts. All the brand names...
A general rule is: do not touch the TQ-product during operation. This is especially important when switching on, changing jumper settings or connecting other devices without ensuring beforehand that the power supply of the system has been switched off.
3.1.2 Technical data electronics The interfaces and system components listed in the following are implemented on the STK-MBa28. Due to the fact that the STK-MBa28 can be installed in a casing the interfaces are divided into external and internal interfaces.
Ethernet 2, block diagram 4.1.1.3 RS485 (X32A) The AUART0 of the TQMa28 drives the RS485 interface of the STK-MBa28. The optocouplers Avago HCPL0631 and HCPL0601 are used for galvanic separation. The Recom RSS-0505/HP serves as the power supply for the galvanically separated part of the RS485 interface.
A voltage of 24 V ±20 % at the GPIO plug connector serves as the power supply. As placement option the supply voltage of the STK-MBa28 can alternatively be used as the power supply. In this case the user has to ensure the correct level of the input voltage.
The module interface of the TQMa28 on which the module is plugged consists of two plug connectors. Plug connector X11 on the STK-MBa28 connects to module plug connector X2 of the TQMa28. Plug connector X17 on the STK-MBa28 connects to module plug connector X1 of the TQMa28.
Page 37 4.2.1.4 LCD backlight (X5, X21, X24) As a placement option the STK-MBa28 offers a driver for displays with LED backlight. A Linear Technology LT3518 is used for this purpose. A 12 V supply of up to 2 A, as well as the signals LCD_BKL_ON and LCD_CONTRAST are available at another plug connector.
A touchscreen controller integrated in the i.MX28, which uses the ADC inputs, is made available on the STK-MBa28. This allows connecting 4- or 5-wire touchscreens at the STK-MBa28. The lines of the touchscreen are equipped with protective ESD diodes, as well as a CLC filter.
4.2.1.6 LVDS display (X9) An LVDS transmitter, which transforms the data signals of the LCD bus to LVDS level, is implemented on the STK-MBa28 as a placement option. A Texas Instruments SN75LVDS83B is used for this. TQMa28 - X1 SN75LVDS83B MBa28 –...
4.4 System Components 4.4.1 Temperature sensor (D10) Near plug connector X17 on the top side of the STK-MBa28 is a National Semiconductor LM73 temperature sensor. It can be read out via I2C1. The base address can be taken from the following table.
Page 63 6.2 Requirements for the superior system 6.2.1 Protection against external effects The STK-MBa28 is not protected against dust, external impact and contact (IP00). An adequate protection has to be guaranteed by the surrounding system. 6.2.2 Thermal management The main heat source is the TQMa28. Information to the cooling of the TQMa28 is to be taken...
7. SAFETY REQUIREMENTS AND PROTECTIVE REGULATIONS 7.1 EMC requirements The assembly TQMa28/STK-MBa28 is EMC tested in a TQ Blue-IPC. Current technical concepts were taken into consideration during the development to avoid or reduce EMC interference. The STK-MBa28 meets the following EMC rules and EMC standards: •...
The display manufacturers permit a number of pixel defects. These vary depending on the manufacturer and type of display. The permissible error of the pixel display manufacturers (warranty claims) are usually set very high. Pixel errors in the display are allowed by TQ-Systems GmbH.
The STK-MBa28 is manufactured RoHS compliant. TQ-Systems GmbH issues the RoHS conformity declaration. 8.6 WEEE regulation TQ-Systems GmbH, which markets the product, is responsible for the observance of the WEEE regulation. 8.7 Accumulator The lithium accumulator, which is necessary to buffer the RTC, is not in the scope of delivery and must be purchased by the user.
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