PR Electronics 3185 Loop Powered Isolator 3185 type is a 1 or 2 channel input loop powered isolator. Inputs and outputs are floating and galvanically separated. The converter eliminates ground loops and can be used for measuring floating signals. Also provides surge suppression and protects control systems from transients and noise. Features and Benefits • High basic 0.05% accuracy in all available signal ranges • 2.5 kVAC isolation and have excellent noise immunity • NAMUR NE21 burst A criteria • Transmits rapid changes in process measurements to PLC/DCS for fast and accurate monitoring of critical signals • Low temperature coefficient better than 0.01% / °C in a wide -25 to +70°C ambient temperature range for precise measurements • Long term accuracy better than 0.1% / 3 years with no need for re-calibration • Installation in ATEX Ex zone 2 / IECEx Zone 2 / FM division 2 DIP-switch programming Re-calibration is not needed after changing the DIP-switch range settings. Just change the DIP-switch, cycle the power to the unit and obtain the new, pre-calibrated I/O range. HART programming is enabled for selected devices. Mounting Devices can be mounted both vertically and horizontally with no air gap separation required. The devices snap onto a power rail or DIN rail and are easily detached by lifting the bottom lock. High level of isolation Safe galvanic isolation of 2.5 kVAC provides high noise immunity and prevents ground loops for accurate delivery of the process signal to your control system. Device status indicators A front LED indicates device status, e.g. an error in the set-up, sensor or hardware. Over voltage- / polarity protection All terminals can withstand up to ±31.2 VDC and are protected against incorrect supply wiring to ensure safe, error-free installation.