8채널 24V 디지털 입력 절연 모듈 -ISO1228
(DIGI ISOLATOR 2 CLICK)
개요
- 본 제품은 8채널 24V 디지털 입력 절연 모듈 -ISO1228 입니다.
- 8채널 24V 디지털 절연칩 ISO1228 를 탑재하고 있습니다.
- 디지털 입력으로부터의 과전압 등으로 메인 회로가 손상 받는 것을 보호 할 수 있습니다.
- SPI 인터페이스를 가지고 있습니다.
특징
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HOW DOES IT WORK?
DIGI Isolator 2 Click is based on the ISO1228, an eight-channel isolated digital input from Texas Instruments. The ISO1228 on this Click board™ is configured in sinking type of inputs. The current drawn from the digital inputs is diverted to LEDs once the digital input crosses the input voltage threshold. This feature allows field-side LED indication with no additional power consumption. The field supply voltage ranges from 8.5 up to 36V, and besides digital inputs, it can be connected over the screw terminals. The isolator also features wire-break detection, an integrated field supply voltage monitor, a built-in CRC check across the barrier, and more.
There are several settings that you can make on DIGI Isolator 2 Click. The ISO1228 supports built-in digital low-pass filters, which the software can program. You can also program it over two FILTER SEL jumpers, which support three input states (high, low, float), resulting in 9 values. Software settings will override those on FILTER SEL. The isolator will turn the FAULT LED on if a fault condition occurs.
DIGI Isolator 2 Click can use a standard 4-wire SPI serial interface to communicate with the host MCU, supporting clock frequencies of up to 25MHz. While using the SPI interface, you can reset the device over the RST pin and control the enable function over the EN pin. Whenever the data on inputs of the isolator changes, the interrupt INT pin will go Low. Whenever the information for the synchronization with the host MCU is transmitted, the SYN pin will be asserted High. The SPI interface supports the Burst mode, which can be selected over the FUNC SEL B jumper.
You can also use a parallel interface where the four SPI pins, along with the RST, SYN, and INT, will act as standard general-purpose inputs (isolator outputs). The OUT7 of the ISO1228 is also used as a Burst mode jumper. In parallel mode, you should let the FUNC SEL B jumper float. Furthermore, you can't use the input 6 of the DIGI Isolator 2 Click board™. The selection of communication can be made over the FUNC SEL C jumper.
This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the VCC SEL jumper. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.
SPECIFICATIONS
Type Isolators,Port expander Applications Can be used for the development of programmable logic controllers (PLC), digital input modules, and more On-board modules ISO1228 - eight-channel isolated digital input from Texas Instruments. Key Features Eight isolated digital inputs, low power, and heat dissipation, wire-break detection, integrated field supply voltage monitor, SPI burst mode, parallel mode, integrated IEC ESD and surge protection, wide field supply voltage range, and more Interface SPI ClickID Yes Compatibility mikroBUS™ Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V,External
문서
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