Serializer Click Board™

Product Code: MIKROE-4925

How Does The Serializer Click Board™ Work? The Serializer Click Board™ uses the MAX31910, an eight-channel digital input translator/serializer for high-channel density digital input modules in industrial and process automation from Maxim Integrated, now part of Analog Devices. It features integrated current limiting, low-pass filtering, and channel serialization. Input current limiting allows a significant reduction in power consumed from the field voltage supply (external typical 24V) compared to traditional discrete resistor-divider implementations. The device uses patent-pending circuit techniques to further reduce power beyond possible input current limiting alone. The MAX31910 translates, conditions, and serializes the 24V digital output of sensors and switches to 5V CMOS-compatible signals required by the MCU. It provides the front-end interface circuit of a programmable logic controller (PLC) digital input module. Selectable on-chip low-pass filters allow flexible debouncing and filtering sensor outputs based on the application.

The serializer is stackable so that any number of input channels (IN1-IN8) can be serialized and output through only one SPI-compatible port. The serializer inputs (IN1-IN8) sense the state (ON vs. OFF) of field sensors by monitoring both voltage and a current flowing through the sensor output. The current sinking through these input pins rises linearly with input voltage until the limit set by the current clamp is reached (set by an onboard potentiometer). Any voltage increase beyond this point does not further increase the input current. The Serializer Click Board™ communicates with MCU through a standard SPI interface in a configuration with installed digital isolators (ISO7741 and LTV-817S). Also, it uses an interrupt pin, the FLT pin of the mikroBUS™ socket, used as a 'fault' indicator which immediately notifies the host when a fault such as an overtemperature or undervoltage condition occurs. It also has a two-channel switch labelled DB, which determines the current switching frequency. The current switching clock period is automatically selected according to a switch position. The Serializer Click Board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. This way, it is allowed for both 3.3V and 5V capable MCUs to use the communication lines properly. However, the 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 Measurements Applications The Serializer Click Board™ be used for various applications such as industrial, process, and building automation, digital input modules for PLCs, and more On-board modules MAX31910 - eight-channel digital input translator/serializer from Maxim Integrated, now part of Analog Devices Key Features Low power consumption, highly integrated, eight channels, robust features and performance for industrial environments, flexible power supply capability, and more Interface SPI Compatibility mikroBUS Click board size L (57.15 x 25.4 mm) Input Voltage 3.3V or 5V,External PINOUT DIAGRAM This table shows how the pinout of the Serializer Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns). Notes Pin Pin Notes NC 1 AN PWM 16 NC NC 2 RST INT 15 FLT Fault Indicator SPI Chip Select CS 3 CS RX 14 NC SPI Clock SCK 4 SCK TX 13 NC SPI Data OUT SDO 5 MISO SCL 12 NC SPI Data IN SDI 6 MOSI SDA 11 NC Power Supply 3.3V 7 3.3V 5V 10 5V Power Supply Ground GND 8 GND GND 9 GND Ground ONBOARD SETTINGS AND INDICATORS Label Name Default