... square 80mm, may be customized 4.EMC certification Modbus to FF, PA, HART Converter,apply to TTL, RS232,RS485 ... AI,AO,DI,DO function blocks.FeaturesCompliant with FF standard, provide FF communication ability to MODBUS deviceSupport Link Master functionSupport ... 01 SupportAI ,AO,DI,DO standard function blocksSupport GSD5.0 and standard EDDSupport standard DD or EDD specificationElectrical interface ...