A. Overview

The transducer has multifunction including electric parameters acquisition, detecting switching value, control and transducing. It can measure almost all parameters of 3-phase 4-wire circuit including voltage, current, frequemcy, active power, reactive power, power factor, accumulated energy consumption and switching value. It adopts all-digital sampling technology and features high accuracy, good stability and high communication speed. Its complete electric isolation design makes strong noiseproof ability. It accepts current, voltage and/or switching value input and has some optional outputs including standard RS-485/RS232 digital port, relay and/or pulse switching value output. These outputs ensure the transducer can be easily connected to computer system and network. Also it can output an analog value and you can select any one of parameters to be the analog output.

• Analog Input —— 3-phase AC current, voltage, frequency.
• Switching value input —— 4 switching value inputs, dry contacts, electrical level: +12V or +24V.
• Output data —— True RMS of voltage Ua, Ub, Uc and current Ia, Ib, Ic; frequencyF; double direction active power P; double direction reactive power Q; double direction power factor COSΦ, double direction active energy, double reactive energy (memory with power failure protection function) and switching value output.
• Measuring range —— Voltage: 100V, 220V, 380V, 500V optional. Current: 1A, 5A optional.
• Relay / pulse output —— 2 switching value outputs (relay or OC output optional). User can set automatic alarm threshold and manually control the alarm. The relay output has both normal opened contact and normal closed contact.
• Analog output —— 0-5V, 0-20mA, 4-20mA optional.

Definition of terminals table 2:

Note: Analog output of terminal No.15 is Vz: 0-5V, Iz :0-20mA, Iy: 4-20mA optional.

1. definition of information message M (register address: 0x0015, high order byte is zero, the low order byte is as following.)

  Note: when the corresponding condition is satisfied, the bit is set to 1. Please see definition of register for the meaning of symbols of message M.
 
2. Definition of high order byte Kh of control message K (register address: 0x0016):
Kh byte is used to set analog output of measured parameters, its content can set analog output to correspond to any one of parameters.

3. Definition of low order byte Kl of control message K (register address: 0x0016):
3.1 Q1 output logic arrangement
   3.1.1  If((M.0|M.1|M.2)&&(Kl==1))   Q1 will output a pulse with width of 1 second or make contacts of relay output closed for 1 second.
Note: when the value of Ia or Ib or Ic is greater than that of Ik register and the value of control register Kl is 1, Q1 output will happen.

   3.1.2  If((M.3|M.4)&&(Kl==2))       Q1 will output a pulse with width of 1 second or make contacts of relay output closed for 1 second.
Note: when the value of Ua or Ub or Uc is less than that of Uk register and the value of control register Kl is 1, Q1 output will happen.

3.1.3  If((M.0|M.1|M.2)&&(M.3|M.4)&&(Kl==3))  Q1 will output a pulse with width of 1 second or make contacts of relay output closed for 1 second.
Note: when the value of Ua or Ub or Uc is less than that of Uk register and the value of Ia or Ib or Ic is greater than that of Ik register and the value of control register Kl is 1, Q1 output will happen.

3.1.4  Master equipment can set Q1 output whatever the value of K is. Q1 will output a pulse with width of 1 second or make contacts of relay output closed for 1 second.

K is a logic control message, it is controled by master equipment and can be read and witten. It is protected from power failure.

3.2 Q2 is directely controled by master equipment. It has OC circuit outputs or normal open contacts and normal closed contacts of relay output.

4. Current/voltage alarm threshold register Ik/Uk (register address: 0x0017/0x0018).
The value to be written can be between 0 and 12000. The corresponding value of 100% measurement range is 10000. Please see data explanation for details.