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isoLynx SCM5B

SCM5B isoLynx SLX200 Data Acquisition System

isoLynx SCM5B image

Faulty thousand-dollar data acquisition systems can shut down billion-dollar operations. The SCM5B isoLynx® SLX200 is a fast, intelligent, fully isolated data acquisition system providing superior reliability, accuracy, and isolation for a wide range of rugged industrial applications. It offers maximum flexibility of analog and digital I/O selection at competitive prices for a broad range of factory automation, process control, test and measurement, machine control, and data acquisition applications. The isoLynx SLX200 implements the industry standard Modbus RTU and TCP protocols, thereby enabling communica-tion with a wide variety of existing third-party software drivers and HMI/SCADA packages. It is fully certified by Modbus-IDA and compatible with OPC.

All I/O Channel-to-Channel Isolated
The flexible, modular design combines a 6- or 12-channel I/O Controller base system and optional 8- or 16-channel expansion backplanes, which can be either panel or DIN rail mounted (see Figure 1 in pdf).

One I/O Controller unit can operate up to 60 channels of differential analog I/O and 128 channels of digital I/O, using Dataforth’s SCM5B analog and SCMD digital modules. The Controller contains a powerful high-speed microcontroller, A/D and D/A subsystem, communication interface, data storage memory, and status LEDs. The A/D system is built around a 16-bit, successive approximation converter and can convert a maximum 60-channel configuration in 17 msec. The D/A converter is also a 16-bit device and can write a maximum 60-channel configuration in 33 msec.

Industry’s Widest I/O Selection
By selecting from over 250 standard and custom single-channel SCM5B analog I/O modules, the isoLynx SLX200 can interface to a broad spectrum of analog signals, including millivolt, volt, milliamp, amp, linearized and non-linearized thermocouple, RTD, potentiometer, slidewire, strain gage, AC-to-True RMS output, frequency, 2-wire transmitter, and transducers requiring DC excitation. Analog output modules are available which provide a wide selection of current or voltage output ranges. Industry standard miniature digital I/O modules are used for digital AC/DC input and output requirements. Users can mix and match most I/O module types on a per-channel basis, thus reducing wasted I/O channels and saving costs.

Interface to digital signals is provided by the dedicated SLX101 digital I/O backpanel. This intelligent backpanel is designed to interface to the SLX200 but can also be used stand-alone for digital I/O only systems.

The operation and storage temperature range for the SCM5B isoLynx SLX200 is –40°C to +85°C; the relative humidity is 0 to 95% noncondensing. Power requirement is +5 VDC, 2.5 W base system with no modules installed. The SLX200 and SLX101 are CE Compliant. SLX200 is CSA C/US Certified for Class I, Division 2 Hazardous Locations.

Flexible Communications and Configuration
The SCM5B isoLynx SLX200 communicates on RS-232 / RS-485 serial links up to 115.2 kbps or 10 Mb/s Ethernet. Up to 32 systems can be multidropped on the RS-485 serial link and up to 4 sockets are supported on Ethernet. Optional Ethernet communication boards are available; these can be factory installed or field upgradeable.

The communication protocol is Modbus RTU for RS-232 / RS-485 or Modbus TCP for Ethernet. Modbus is an open, industry-standard protocol that defines how devices on a network or bus communicate with each other. Full certification of the SCM5B isoLynx SLX200 by Modbus-IDA ensures the device can be integrated onto existing Modbus networks, and most common Modbus function codes are supported. The system is also OPC compatible.

As device configuration is performed using standard Modbus function codes, any third-party software application that supports the Modbus RTU and / or Modbus TCP protocol can be used to configure the device. Configuration parameters are stored in non-volatile memory, so configuration only has to happen once. Free configuration software is provided to ensure configuration is easy and intuitive (see Figure 2 and Figure 3 in pdf).

Powerful Firmware Features
The SCM5B isoLynx SLX200 hosts many powerful firmware features. Two analog scan modes are supported: one for general purpose signal monitoring with running average, maximum, and minimum values available for each analog input; the other with user-configurable scan parameters such as scan list, scan rate, and scan count, used to obtain data with highly accurate time correlation between samples. Configurable default output values ensure output signals get set at safe values when unexpected power outages or brownouts occur. Power-on self-test results can be obtained visually by glancing at a status LED or programatically by reading the appropriate register on the device. A section of memory is set aside for general purpose user data, some of which is stored in non-volatile memory.

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Specifications

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  • Modbus RTU Support on RS-232 and RS-485
  • Modbus TCP Support (optional)
  • 1500 Vrms Input-to-Output & Channel-to-Channel Isolation
  • 240 Vrms Field-side Protection
  • 16-Bit A/D, D/A
  • Up to 6-Pole Analog Input Filtering
  • ±0.012% Base System Accuracy, No Modules
  • ±0.005% Base System Linearity, No Modules
  • ±0.03% Module Accuracy
  • ±0.005% Module Linearity
  • Best I/O Selection: 250+ Different I/O Modules
  • –40°C to +85°C Operating Temperature
  • Supported by ReDAQ® Freedom Software
  • Free Configuration Software
  • All Analog I/O Modules Certified to CSA C/US, CE, and ATEX Requirements
  • SLX200 & SLX101 CE Compliant
  • SLX200 CSA C/US Certified (Class I, Division 2, Groups A, B, C, D)
  • Manufactured per RoHS Directive 2002/95/EC