Power supply voltage: 20?35V, d.c. Power supply protection: reverse power supply protection Current consumption (24V power supply, 20mA output): ?50mA Dangerous side: Input signal: 0?5k? potentiometer (Special resistance potentiometer, specified when ordering) Safe side: Output signal: 4?20mA Load resistance: R ?550? L Voltage output: 1?5V Load resistance: R ?250k? L (Users need to select voltage or current output when ordering) Alarm indication: Below the lower limit of the range, the L indicator light flashes, and the current output is about 3.8mA Above the upper limit of the range, the H indicator light flashes, and the current output is about 20.8mA When the line is broken, the L and H indicators flash at the same time, and the current output is about 21mA Response time: 2s to reach 90% of the final value Conversion accuracy (20?): 5?/0.1% F.S. (larger value) Connected field equipment and area: Potentiometer User requirements Temperature drift (-20???60?): 0.01%F.S./? Insulation strength (intrinsically safe end and non-intrinsically safe end): 2500V, a.c.; 1min Electromagnetic compatibility: in accordance with GB/T 18268 (equivalent to IEC 61326-1) Ambient operating temperature: -20?~+60? Zone 0, Zone 1, Zone 2, ?A, ?B, ?C, T4~T6 hazardous areas