MAXM15462AMB+T

Smart factories (often referred to as Industry 4.0) are made possible through the convergence of industrial IoT, adaptive manufacturing, cloud computing, and artificial intelligence. Together, these four elements increase productivity by providing the flexibility to adapt manufacturing lines. This allows the production of multiple products without the need to stop production or schedule a technician to reconfigure equipment. Increasingly, this new level of intelligence is being moved to the very edge of the factory floor. 

The **MAXREFDES212** Go-IO programmable logic controller (PLC) reference design (Figure 1) consists of multiple software configurable IOs in a compact form factor (less than 1 cubic inch) to address the needs of industrial automation, building automation, and industrial robotics. GoIO provides design engineers with the means to rapidly create and prototype new industrial control systems before they are sourced and constructed. 

## **ISOLATED DIGITAL INPUT** 

The **MAX22192** octal isolated digital input (Figure 2) translates eight, 24V, current-sinking industrial inputs to an isolated, SPI-compatible output. 

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ROBUST<br>DIGITAL IO<br>COMMUNICATIONS<br>MAX14912  Octal Digital Output with  MAXM22511 Integrated Iso Power<br>Fast / Safe Demag with Diagnostics with Iso RS485 Transceiver<br>MAX22192  Octal Isolated Digital Input MAX14483 / MAX14130 Low Power,<br>Small Size, Digital Isolators<br>IO-LINK INDUSTRIAL POWER<br>MAX14819  Dual IO-Link Master  MAXM15462  42V, 300mA Himalaya<br>Transceivers, with Integrated  uSLICTM Step-Down Power Module<br>Framer and L+ Supply Controllers<br>**----- End of picture text -----**<br>


_Figure 1. Go-IO Key Enabling Technologies_ 

- **Flexible Configuration:** Go-IO can be configured for Type 1, Type 2, or Type 3 inputs 

- **"Energy-less” LEDs:** Current from the input signals is routed through LEDs, meeting the IEC 61131-2 requirements with no additional power dissipation 

- **Wire Break Detection:** Provided by a second threshold detector on each input 

Key Benefits: 

- **Power Savings:** Current limiters on each digital input greatly reduce power dissipation while increasing accuracy compared to traditional resistive inputs 

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ULTRA-PORTABLE IO ON THE GO: MEET THE GO-IO 

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24V 150Ω  3.3V 1.8V<br>1µF 0.1µF 0.1µF 1µF 0.1µF 1µF<br>7.5kΩ  VDD24F VDD3F VLF M1 M0 VDDL<br>REFDI<br>24kΩ<br>REFWB<br>EXTVM AFS GPI<br>1.5kΩ<br>FIELD INPUT IN1<br>1000pF LED1 LCS CS<br>LSCLK SCLK<br>FIELD INPUT 1.5kΩ 1000pF IN2 MAX22192 LSDOLSDI MOSIMISO CONTROLLERMICRO<br>LED2<br>LLATCH GPO<br>1.8V<br>INPUT AT PIN<br>1.5kΩ  4.7kΩ<br>FIELD INPUT IN8<br>1000pF LED8 SDOEN<br>470Ω  LFAULT GPI or INT<br>LEDC2<br>470Ω<br>LEDC1<br>470Ω<br>24VM LEDC0<br>LEDR2<br>LEDR1<br>LEDR0<br>FCS FSCLK FSDO FSDI OSDI FFAULT IFAULT OREADY IREADY FLATCH GNDF GNDL<br>4.7kΩ  4.7kΩ<br>3.3V FIELD SIDE LOGIC SIDE<br>**----- End of picture text -----**<br>


_Figure 2. MAX22192 Octal Isolated Digital Input_ 

## **ISOLATION** 

The **MAX14483** (Figure 3) is a 6-channel, 3.75kVRMS digital galvanic isolator using Maxim’s proprietary process technology. The six signal channels are individually optimized for SPI applications. 

Key Benefits: 

- **High-Speed SPI:** Low propagation delay on SCLK, SDI, and SDO with up to 100MHz clock, 200Mbps data rate 

- **Robust Operation:** Galvanic isolation of digital signals 

   - Withstands 3.75kV for 60s (VISO) RMS 

   - Continuously withstands 450VRMS (VIOWM) 

   - Withstands ±10kV surge between GNDA and GNDB with 1.2/50µs waveform 

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MAX14483<br>SBA DETECTOR VDDB<br>UVLO<br>DELAY<br>VDDA<br>UVLO<br>IRDY DETECTOR SAA<br>DELAY<br>OAUX IAUX<br>OSDI ISDI<br>OSCLK ISCLK<br>OCS ICS<br>SDOEN<br>ISDO OSDO<br>IFAULT OFAULT<br>GNDA GNDB<br>**----- End of picture text -----**<br>


_Figure 3. MAX14483 Digital Isolator_ 

## **DIGITAL OUTPUT** 

Additional space and power savings are achieved in the digital output drivers using the **MAX14912** / **MAX14913** octal high-speed, high-side switch and push-pull driver. 

Key Benefits: 

- **Reduced Heat Dissipation:** Best-in-class RON of 230mΩ (max) 

- **“Safe DeMag”:** Safe discharge of any inductive loads using Maxim’s proprietary technology 

- **Fast Switching:** 200kHz switching ideal for high-speed control systems 

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ULTRA-PORTABLE IO ON THE GO: MEET THE GO-IO 

## **IO-LINK** 

Two-way communication with up to four IOLink® smart sensors is made possible via the two dual-channel **MAX14819** IO-Link master transceivers (Figure 4). 

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24V<br>1µF 1µF<br>EN/UVLO VIN<br>MAX15062A LX<br>VCC VOUT<br>1µF GND<br>10µF 10µF<br>3.3V<br>PMOS1A PMOS2A<br>0.1µF<br>VL VS VCC G1A SN1A SN2A G2A L+A<br>IRQ<br>µC SPI 100Ω<br>DIA<br>MAX14819<br>XI<br>14.7456MHz CQA<br>XO 330pF<br>REGEN 5V<br>CLKO RXRDYA/LD1A<br>CLKI A0 A1 TXA TXENA GND RXERRA/LD2A<br>µH<br>33<br>100 µ1F<br>Ω<br>**----- End of picture text -----**<br>


_Figure 4. MAX14819 Dual IO-Link Master Transceiver_ 

Key Benefits: 

- **Low-Power Architecture:** Low driver onresistance (1Ω) 

- **Integrated IO-Link Framer:** Eliminates the need for external UARTs and relieves microcontroller from timing-critical task 

- **Flexible Configuration:** 

   - Two auxiliary Type 1/Type 3 digital inputs 

   - Supports NPN sensors 

Key Benefits 

- **Reduced Power Dissipation:** Total bridge on-resistance of 280mΩ (typ) 

- **Simplifies Design:** 

   - Current regulation only requires a sense resistor 

   - Current-sense input simplifies PCB layout 

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24V M<br>3.3V<br>VDD M1 M2<br>3.3V<br>MAX14870<br>MAX14870<br>MAX14872<br>FAULT<br>IRQ<br>µ C DIR [+] VDD VDD<br>GPO<br>PWM PWM [+] DRIVER<br>EN<br>DRIVER<br>CURRENT<br>REGULATION<br>SNS COM GND<br>RSENSE<br>+ THESE PIN NAMES ARE FOR THE MAX14870. ON THE MAX14872, THESE ARE THE FWD AND REV INPUTS.<br>**----- End of picture text -----**<br>


_Figure 5. MAX14870 Motor Control_ 

## **RS-485 ROBUST COMMUNICATIONS** 

Robust communication is provided by the **MAXM22511** (Figure 6) RS-485 transceiver. Data and power isolation are provided in a single integrated package which needs no external components, saving space and design costs. 

   - Dual 24V sensor supply controller 

- **Robust Performance:** Integrated protection with overvoltage and reverse-polarity protection on all interface pins 

## **MOTOR DRIVER** 

The **MAX14870** DC motor driver (Figure 5) provides a small, low-power, simple solution for driving and controlling brushed DC motors and relays with voltages between 4.5V and 36V. 

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VDDA VRECT VLDO<br>VDDB<br>DC-DC  LDO<br>SD<br>GPIO<br>GPIO SBA A<br>RXD<br>RXD<br>µc GPIO RE B<br>TXD Y<br>TXD<br>Z<br>DE<br>GPIO<br>GNDA MAXM22511 GNDB<br>ISOLATION BARRIER<br>RS-485<br>TRANSCEIVER<br>**----- End of picture text -----**<br>


_Figure 6. MAXM22511 RS485 Transceiver_ 

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ULTRA-PORTABLE IO ON THE GO: MEET THE GO-IO 

## **POWER CONVERSION** 

The DC-DC voltage conversion stage of the Go-IO reference design further demonstrates potential power and space savings. 

The **MAX17681** high-voltage, high-efficiency, isobuck DC–DC converter provides isolated power up to 3W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage. The MAX17681 uses peak-current-mode control. The low-resistance, on-chip MOSFETs ensure high efficiency at full load while simplifying the PCB layout. 

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24V 5V,300mA<br>VIN OUT<br>1 µ F 10 µ F<br>EN/UVLO GND 348k Ω<br>MAXM15462<br>RESET FB<br>VCC LX<br>75k Ω<br>1 µ F<br>MODE<br>**----- End of picture text -----**<br>


_Figure 7. MAXM15462 DC-DC Module_ 

The **MAXM15462** (Figure 7) is a high-efficiency, synchronous step-down DC-DC module with integrated controller, MOSFETs, compensation components, and inductor that operates over a wide input-voltage range. The module operates from a 4.5V to 42V input and delivers up to 300mA output current over a programmable output voltage from 0.9V to 5V. 

Additional Benefits: 

- **Robust Operation:** 

   - Hiccup overcurrent protection 

   - Overtemperature protection 

   - -40°C to +125°C ambient operating temperature 

   - -40°C to +150°C junction temperature 

- **Rugged and Reliable:** 

   - Complies with CISPR22 (EN55022) Class B conducted and radiated emissions 

   - Passes drop, shock, and vibration standards: 

   - JESD22-B103, B104, B111 

- **Space-Saving:** 

   - Available in a low-profile, compact 10-pin, 2.6mm × 3mm × 1.5mm, uSLIC™ package 

## **CONCLUSION** 

The Go-IO PLC reference design provides designers and industrial engineers with the flexibility to experiment and find the best solution for low power dissipation, robust performance, and improved diagnostics, all in the smallest possible form factor. 

## **LEARN MORE** 

- **MAXREFDES212** Go-IO Industrial IoT Reference 

- Design 

- **MAX14870** Motor Driver 

- **MAX14912** Digital Output Driver 

- **MAX22192** Octal Isolated Digital Input 

      - **MAXM22511** RS485 Transceiver 

      - **MAXM15462** Step Down DC-DC Power Module 

      - **MAX17681** Step Down DC-DC Conerter 

   - **MAX14819** IO Link Transceiver 

   - **MAX32630** Microcontroller 

- **MAX14483** Digital Isolator 

## Need Design Support? Call 800 MAXIM-IC (888 629-4642) 

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