Acromag Expands Busworks Range


Acromag has introduced the 967EN and 968EN Busworks Ethernet I/O modules with distributed I/O and SCADA. These models provide an eight-channel interface for differential analogue voltage or current input signals. Each model is available in industrial and commercial-grade versions, which reduces the cost of applications that do not need wide operating-temperature ratings, advanced signal processing or hazardous-location safety approvals.

The units feature a signal integrator/totaliser function, peer-to-peer messaging and -40 to +70C capability. They are designed to meet UL/cUL Zone 2 Class 1 Division 2 ABCD requirements. All units provide 16-bit A/D conversion of sensor inputs for Modbus TCI/IP control network communication. Two models, each with eight differential analogue inputs, support a variety of I/O ranges.

The 967EN accepts DC current with +/-20mA, 0-20mA or 4-20mA input ranges. The 968EN accepts +/-5V or +/-10V ranges. Fast scanning updates all eight-channels in less than 10mS. Dual-format data registers support 16-bit integers and 32-bit floating-point formats. IEEE-754 32-bit floating point scaling registers are configurable on a per-channel basis. A sample averaging function is also configurable. On industrial-grade units, an integration function can totalise inputs with non-volatile counter registers on all channels.

Surge protection and three-way 1500V isolation between I/O, power and network circuits increase reliability. Common applications involve monitoring temperature, pressure, flow and level instruments in process control, automation, remote data acquisition and supervisory management systems.

Acromag's i2o technology enables fast peer-to-peer communication between 967/968EN input modules and corresponding Busworks output modules over any Ethernet media without a PC or host controller in between. Updates are triggered by a per cent change or at set intervals (0.1 per cent, 100mS resolution). These input modules are easy to use.

No software is required as the units can be configured using any web browser to set operating parameters on embedded configuration menus. An auto-copy function lets users rapidly apply a saved configuration to multiple units. The automatic-calibration function uses built-in precision sources; on-demand self-test capability verifies the calibration. Front-panel LEDs provide a visible confirmation of proper operation.

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