Modbus RTU is a low-cost, easy-to-implement communications protocol that is commonly used in mid-sized control systems (up to 32 nodes), and widely used in solar installations. The Modbus RTU protocol makes use of the RS485 transmission standard, based on shielded twisted pair cabling. This combination can communicate reliably over distances of more than 1000m, even in the presence of electromagnetic interference (EMI). POSITAL IXARC encoders with the Modbus RTU interface are available in a wide range of mechanical configurations. Customers can select exactly what they need in terms of housing material and levels of environmental protection, shaft type and diameter, mounting flange, and connector type. Customers can also choose between single- and multi-turn measurement ranges. For multi-turn models, the rotation counter is powered by a Wiegand sensor that harvests energy from the rotation of the device’s shaft. This ensures that each complete rotation is reliably recorded, even when power to the control system is unavailable. With no need for backup batteries or complex gear systems, maintenance costs are virtually zero. POSITAL’s Modbus support extends to the company’s TILTIX range of inclinometers. These devices are used anywhere it is important to monitor the tilt angle of equipment or components.
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