Communication and controller board of fieldbus is the key component to FF bus distributed control. Fieldbus instrument communication board is instrument round card for short because the board set up in the instrument is always circle. This round card is developed on the base of standard Foundation Fieldbus / Profibus PA physical protocol and becomes fieldbus device combined with conventional apparatus and instrument. As the core device of intelligent sensor and controller, NCS-RC105 round card instrument provides the interface of controller, collection and display for industry field instrument and sensor. The FF fieldbus protocol stack run on the round card instrument have the link activity scheduler (LAS) function, so it can be used as either fieldbus link master device or basic device and provide abundant fieldbus function block.

Performance specification:

●     CPU: ATMAL AT91M40800

●     FLASH: 512K × 16BIT(program depositï¼Â‰

●     SRAM: 256K × 16BIT SRAM (data temporary deposit)

●     CMOS SRAM: 32K × 8BIT(restore communication data)

●     EEPOM: 8K × 8BIT(restore static data)

●     Fieldbus power supply mode

Voltage: 9 ~ 32VDC

Power consumption: < 15mA

●     Bus transmission rate: 31.25kb / s

●     JTAG programming interface

●     Standard 1151 instrument interface (other interface can be customized by the need of user)

●     Definite purpose LCD display interface (other interface can be customize by the need of user)

●     AI, AO, DI, DO, PID, DSP function block (other function block can be customized by the need of user)

●     Temperature restriction: - 40 ~ 85ºC

●     Humidity restriction: ≤ 90% RH

●     Update period: ≤ 0.3s

●     Effect on electromagnetic interference : meets IEC 61000

●     Size of round card: φ77mm × 1.5mm(customized by the need of user)

●     Provide 10mA / 3.3V stabilized voltage supply (customized by the need of user) is used by