EJA210A / EJA220A

The EJA Series is available with BRAIN, HART, FOUNDATION™ fieldbus or PROFIBUS PA communication protocols. The high performance flange mounted differential pressure transmitter models EJA210A and 220A can be used to measure levels of densities of solidifying or precipitating liquids. Both output a 4 to 20 mA DC signal corresponding to the measured differential pressure. Features Excellent performance and stability The EJA series uses a silicon resonant sensor formed from monocrystal silicon, a perfect material which has no hysteresis in pressure or temperature changes. The sensor minimizes overpressure, temperature change, and static pressure effects, and thus offers unmatched long-term stability. Compact and light-weight design Half the weight of conventional models thanks to miniaturization of the casing with the amplifier ASIC, pressure cell structure, and flange. The ASIC uses the minimum number of parts and improves the reliability of the amplifier. Fieldbus communication capability Fieldbus is a digital two-way communication system. It is a revolutionary technology for configuring instrumentation control systems and a promising successor to the standard 4 to 20 mA analog communication used in most field instruments today. EJA series offers two types of fieldbus models, FOUNDATION™ fieldbus Low Voltage Mode and PROFIBUS PA devices, which ensure interoperability between Yokogawa and other manufactures. As for software, the EJA series incorporates two AI function blocks that compute differential and static pressures to allow flexible configuration of instrumentation. Specifications EJA210A / EJA220A Liquid Level Differential Pressure Transmitter M Capsule H Capsule Range -100 to 100 kPa (-400 to 400 inH2O) -500 to 500 kPa (-2000 to 2000 inH2O) Span 1 to 100 kPa (4 to 400 inH2O) 5 to 500 kPa (20 to 2000 inH2O) Accuracy ±0.2% ±0.2% Degrees of protection IP67, NEMA 4X, and JIS C0920 immersion proof Certificates FM, CENELEC ATEX, CSA, IECEx Output 4 to 20 mA DC or FOUNDATION™ fieldbus or PROFIBUS PA 2-wire system with digital communication Supply voltage BRAIN and HART:10.5 to 42 V DC (10.5 to 30 V DC for Intrinsically safe type) Fieldbus:9 to 32 V DC (9 to 24 V DC for Entity model and 9 to 17.5 V DC for FISCO model) Ambient temperature -40 to 85 deg C (-40 to 185 deg F) (general use type) -30 to 80 deg C (-22 to 176 deg F) (with integral indicator) Process temperature -40 to 120 deg C (-40 to 248 deg F) (general use type) Maximum working pressure Flange rating pressure Mounting Flange mounting Process flange size EJA210A: 3-inch (80mm), 2-inch (50mm) EJA220A: 4-inch (100mm), 3-inch (80mm) Diaphragm material (High side) SUS316L, Hastelloy C-276, Tantalum Process flange material S25C, SUS304, SUS316 Housing Cast aluminum alloy or SUS316 equivalent stainless steel (optional)