I. Overview C803 series of intelligent instruments integrated display, control, transmission and other functions, can enter thermocouple, RTD, standard current, standard voltage signals can be displayed, control the temperature, pressure, level, speed, pH, PH value and other physical quantities . C803 series products are widely used in thermal, chemical, electrical and mechanical equipment, municipal engineering, building automation and other industries, is composed of a variety of automatic control system ideal product. Second, the characteristics ◆ Modular design, SMT technology, high-performance switching power supply ◆ 19 kinds of signals compatible input ranges, the decimal point can be set, modified ◆ Input signal arbitrary choice, thermocouple cold junction compensation input comes ◆ isolated current voltage transmission output (12 resolution), the output range arbitrarily set ◆ two relay outputs, each relay can be set free for the upper or lower control and relay values ??and the release value (with hysteresis) can be arbitrarily set three, the technical parameters 1 Power Supply: AC/DC85 ~ 260V (other voltages can be customized) 2. consumption: less than 5W 3. input signal: (a total of 19 kinds) Thermocouple: T, R, J, WRe3- 25, B, S, K, E Thermal resistance: Pt100, Cu50 standard signal: 0 ~ 400Ω, 0 ~ 75mV, 0 ~ 30mV 0 ~ 5V, 1 ~ 5V, 0 ~ 10V, 0 ~ 10mA 0 ~ 20mA, 4 ~ 20mA 4. Display range: -1999 ~ 99995 Cold junction compensation: 0 ~ 50 ℃ 6. Basic error: 0.2% FS ± 1 word 7. feed output: DC24V/30mA 8. contact capacity: AC250V/3A ; DC24V/5A 9. transmitter output signal: 0 ~ 20mA, 4 ~ 20mA 10. transmitter load capacity: not less than 500Ω 11. use of the environment: 0 ~ 50 ℃; ≤ 85% RH upper limit of the instrument alarm output (can be do upper limit control) 4-20MA control output