Dual-Ethernet DAQ system

30/07/2020

Adlink has launched a rugged dual-Ethernet data acquisition (DAQ) system with a Linux-based software development kit (SDK) designed for machine condition monitoring (MCM) using a RESTful application programming interface (API). The MCM-204  is equipped with four 24-bit analogue-to-digital converter (ADC) inputs to support remote real-time monitoring, analysis and control.

The 126.5 × 110 × 40 mm MCM-204 follows Adlink’s earlier, and larger, Intel Apollo Lake-based MCM-100 machine condition monitoring edge platform. It joins other DAQ computers, such as Advantech’s 12-bit MIC-1810 and 16-bit MIC-1816, as well as Raspberry Pi DAQ HATs such as MCC’s MCC 152.

Based on an undisclosed 1 GHz Arm Cortex-A9 processor, the system enables MCM with a 24-bit DAQ combined with dual-Gigabit Ethernet ports, which transmit data to the back-end server and enable daisy-chain connection of multiple devices. The Linux-driven SDK has a RESTful API that reports machine conditions, a C/C++ API for streaming data and a web console for easing remote configuration and use as a portable DAQ.

The SDK features an ‘exclusive’ custom filtering algorithm import mechanism that allows users to modify the filter or pre-processing algorithms in C/C++ and compile under Linux. The system can migrate domain know-how filtering algorithms to the edge in a secure manner.

High-frequency signals are captured at 128 kS/s and all input channels have a built-in IEPE 4 mA excitation current source, eliminating the need for additional signal conditioning to trigger sensors and capture signals, claims the company. The MCM-204 supports digital tachometer, digital temperature sensor and voltage output load current sensor functions for acquiring rotating speed, temperature and load current. The system can calculate vibration-related indices such as voltage, fast Fourier transform (FFT) and root mean square (RMS).

The MCM-204 supports Adlink’s scalable DataConnect Pro software as a service (SaaS) for remote monitoring. Last September, Adlink added DataConnect Pro as a SaaS option for its earlier MCM-100.

The MCM-204 is equipped with 1 GB DDR3, 4 GB eMMC,  two GbE and two USB 2.0 ports (WiFi dongles only). The four analogue inputs feature rugged BNC connectors and the isolated four-channel digital input and output (DIO) uses a terminal block. Other features include a digital temperature sensor, four LEDs and a DIN rail kit with optional wall mounting.

The system provides a 9-30 VDC input with 1.5 kV isolation and runs at a maximum of 8.8 W. There is a 0°C-50°C operating range, IP30 protection and resistance to vibration (5 GRMS, 5-500 Hz,  three axes), shock (100 G, half-sine 11 ms) and humidity (95% at 40°C, non-condensing). Adlink also lists certifications for electromagnetic compatibility (EMC), electromagnetic interference (EMI), electromagnetic spectrum (EMS) and safety.

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