Description
Honeywell SDW-550EC.20230720
Technical Specifications Brand: Honeywell Model: SDW-550EC Power Supply: 24 VDC Input Signal: Standard 4-20 mA analog current signal Output Signal: Isolated 4-20 mA analog current signal Isolation Voltage: 1500 Vrms between input, output and power supply Accuracy: ±0.1% full scale Operating Temperature: -20°C to +60°C Humidity: 5% to 95% non-condensing Mounting: DIN rail mounting Protection Grade: IP20
Functional Features Three-port isolation design, input port, output port and power port are mutually isolated. Convert 4-20mA analog signal from field sensor to isolated 4-20mA output. Eliminate ground loop noise in long-distance field signal transmission. High signal transmission accuracy for process measurement variables. Compact DIN rail form factor for installation inside control cabinet. Low power consumption during continuous operation. Built-in surge protection for input and output signal terminals.
Application Scenarios Chemical plant analog signal transmission, oil refinery pressure and flow sensor signal isolation, power plant process signal conditioning, water treatment plant 4-20mA sensor signal transmission.
Performance Parameters High precision signal conversion with low temperature drift. Strong suppression capability for common-mode ground loop interference. Stable signal output under power supply fluctuation. Low signal distortion during long-term continuous running. High isolation withstand voltage protects control system from field surge.
Material Composition Housing: Flame retardant PA plastic DIN rail enclosure. PCB: FR4 printed circuit board with conformal coating. Core Components: Isolation transformer, signal conditioning operational amplifier, surge protection components. Terminals: Tin-plated copper screw terminals.
Structural Features Thin rectangular DIN rail module housing. Screw terminals on top and bottom of module for input, output and power wiring. Rear integrated DIN rail spring clip for fast mounting and removal. Internal isolation transformer separates input, output and power circuits.
Working Principle 4-20mA signal from field sensor enters input terminal. Signal conditioning circuit samples current value, then transfers data across isolation transformer without direct electrical connection. Output circuit reconstructs isolated 4-20mA current signal to DCS input module. The three-way isolation breaks ground loop path and blocks surge voltage from field side.
Installation Requirements Clip module onto standard DIN rail inside control cabinet. Wire 24 VDC power supply to power terminals. Connect field sensor signal to input terminals, connect DCS side wiring to output terminals. Tighten terminal screws. Separate signal wiring from high voltage power cables.
Usage Notes Verify input and output terminal definition before wiring. Do not apply voltage beyond signal specification to input terminals. Check DIN rail clip fastening status regularly. Keep cabinet environment dry and dust-free. Do not disassemble sealed plastic housing.
