Analogue, Mixed Signal, LSI


Multi-channel PLC input isolators

7 September 2016 Analogue, Mixed Signal, LSI

Silicon Labs has introduced the industry’s first high-speed, multi-channel digital isolators designed to meet the demands of programmable logic controller (PLC) applications.

The new Si838x PLC field input isolator family offers up to 2 Mbps, up to eight channels per device, bipolar input flexibility, high noise immunity and 2,5 kVRMS safety isolation.

The Si838x family provides a purpose-built solution for PLC applications including industrial I/O modules, computer numerical control (CNC) machines and servo motor control. They are also ideal for process automation controllers (PACs) used in distributed process control systems.

Widely deployed in harsh factory floor environments, PLCs must be robust and compact. Many PLC designs scale up to 128 channels and have multiple high-speed inputs. While optocouplers have provided the default isolation solution for decades, they present major challenges to PLC designers. Lacking high-speed capabilities, optos are not fast enough for high-performance PLC applications such as servo motor control.

They also lack high noise immunity, and their performance degrades over time and temperature, posing reliability risks in high-temperature industrial applications. The Si838x family addresses these challenges by providing a flexible, high-speed, multi-channel bipolar isolation solution in a compact QSOP package with a longer service life and higher reliability than opto-based solutions.

Si838x isolators provide eight channels of 24 V digital field interface. By daisy chaining 16 of them in a system design, developers can create PLCs with up to 128 channels supported by a single serial peripheral interface (SPI) port on the system’s embedded processor.

The controller interface can be eight parallel channels or a four-port SPI. Developers can configure the SPI for on-the-fly programming for custom de-bounce of noisy signals and for daisy chaining to support high-channel-density PLC designs. An optional de-bounce filter is either pre-programmed in a parallel configuration or programmable in a serial-out configuration.

For more information contact NuVision Electronics, +27 (0)11 608 0144, gdeklerk@nuvisionelec.co.za, www.nuvisionelec.co.za



Credit(s)



Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

High-speed PIN diode
Altron Arrow Analogue, Mixed Signal, LSI
Vishay’s new high-speed Silicon PIN diode is able to detect both visible and near infra-red radiation over a wide spectrum range from 350 to 1100 nm.

Read more...
High-speed edge AI evaluation kit
NuVision Electronics DSP, Micros & Memory
The AMD Versal AI Edge VEK280 evaluation kit is now available. Featuring the Versal AI Edge VE2802 device, this kit is optimised for evaluating and developing compute-intensive ML inference applications.

Read more...
Matter 1.2 adds new capabilities
NuVision Electronics Editor's Choice Telecoms, Datacoms, Wireless, IoT
This update introduces new device types and expands the reach of Matter into new markets, while also bringing other improvements that enhance interoperability and user experience.

Read more...
Analogue front end for sensor measurements
Electrocomp Analogue, Mixed Signal, LSI
The NJU9103 AFE from Nisshinbo is a tiny analogue front end, with a 16-bit resolution ADC and up to 512 x signal amplification from the programmable gain amplifier.

Read more...
Single-channel software configurable I/O
Altron Arrow Analogue, Mixed Signal, LSI
These use cases of the AD74115H include analogue output and input, digital output and input, resistance temperature detector (RTD), and thermocouple measurement capability.

Read more...
Current-sense amplifier with PWM rejection
Altron Arrow Analogue, Mixed Signal, LSI
Analog Devices’ AD8410A is a high voltage, high bandwidth current-sense amplifier that features an initial gain of 20 V/V and a 2,2 MHz bandwidth.

Read more...
Linux SD-WAN appliance
NuVision Electronics Computer/Embedded Technology
With its powerful quad-core performance and 12 high-speed SERDES lanes, the SoC delivers exceptional processing power for network data management and security.

Read more...
Combining a LPF and ADC driver for a 20 Vp-p signal
Altron Arrow Analogue, Mixed Signal, LSI
A mixed-signal ADC driver circuit’s optimum performance depends on multiple variables: the driver’s settling time, the RC filter’s time constant, driving impedance, and the ADC sampling capacitor’s kickback current, all interact during acquisition time and contribute towards sampling errors.

Read more...
Adaptive system-on-chip
NuVision Electronics Telecoms, Datacoms, Wireless, IoT
Built on the proven Versal architecture, AMD’s VP1902 SoC delivers double the capacity and connectivity of the prior generation device.

Read more...
Pressure sensor with NextNav certification
EBV Electrolink Analogue, Mixed Signal, LSI
STMicroelectronics’ LPS22DF pressure sensor has received a NextNav certification, which guarantees performance and reliability for geolocation and other types of applications.

Read more...