Series CE-A digital electrical transducer can easily measure many
kinds of useful electrical parameters of 3-phase 4-wire, 3-phase
3-wire and 1 element power lines. It can also be widely used in
various industrial control and measuring systems. One sensor/transducer
can replace many kinds of single parameter Transducer i.e. current,
voltage, frequency, power, power factor and energy Transducer etc.
It can reduce the cost of system and is easy to wiring at work site;
especially its advanced isolation technology greatly improved the
performance of system and help to carry the reliability and stability
of the system to a new and higher level. CE-A is able to connect
to any industrial digital control system with the RS-485 bus communication
technology and ASCII order set. So it is convenient to program and
to extend the system and let you build up your own control system
easily.
The default configuration of each CE-A transducer before delivery:
transducer address is set to "01"(hex), and baud rate is 9600bps.
Note:
- Transducer address is programmable. It can be set from 0 through
255(00-FFH) optionally.
- Five programmable baud rates can be used: 1200bps, 2400bps,
4800bps, 9600bps and 19200 bps.
- The configuration data will be stored in EEPROM after the transducer
address and baud rate were revised.
1. Set the Baud Rate: code of communication baud rate: 03---07
| Baud rate code (hex) |
Baud rate |
| 03 |
1200bps |
| 04 |
2400bps |
| 05 |
4800bps |
| 06 |
9600bps |
| 07 |
19200bps |
2. Select the Measuring Range:
You may select Series CE-A products with their measuring range of
voltage (0~500V), current (1~25A). Usually 1.2 times of the maximum
value of measuring range can be measured correctly.
The transducer could not be damaged when the inputs are less than
2 times of the maximum value of measuring range of voltage and 10
times of the maximum value of measuring range of current. Pay attention
to connect the polarity of power correctly with right rated voltage.
3. RS-485 Network:
Up to 64 Transducer can be connected in an RS-485 bus; the maximum
communication distance can reach 1200m. The transducer can be connected
directly to digital industrial control system with RS-485 interface.
If the system has only RS-232C interface available, RS-232C/RS-485
converter have to be used for data handshaking.
4. Configuration:
Each CE-A sensor/transducer must be configured before it is connected
to a netwoek. The baud rate of transducer must conform to that of
the netwoek; and no address collision (no overlapping the address
of any other device in the netwoek) could be allowed. To configure
a transducer you need RS-485/RS-232C converter, computer with RS-232
interface and application software of intelligence transducer. The
configuration can be completed easily by CE-A sensor/transducer
application software. You should configure it by programming according
to the order set of the transducer.
Data acquisition: After you connected the transducer correctly and
properly. When the computer sends one of read orders, the transducer
will return (respond) the measured data to the computer. The data
inside the EEPROM of the CE-A sensor/transducer will be refreshed
every 250ms(the values of voltage and current etc. are RMS during
the 250ms). Data of energy is accumulated since powered-on and is
cleared after received a clear order.
Output data is in the form of a percentage of the maximum value
of its measurable range. Its format consists of 1 place of sign
"+" or "-" and 5 digits of decimal system value of data and a decimal
point. The data of frequency is a real value of the frequency measured.
Its conversion formula is as follows:
The maximum value of measurable range of current of the transducer:
Io
The maximum value of measurable range of voltage of the transducer:
Uo,
Then
Voltage U = u x Uo
Current I = i x Io
Active power P = p x Uo x Io x 1
Active power P = p x Uo x Io x 2
Active power P = p x Uo x Io x 3
Reactive power Q = q x Uo x Io x 1
Reactive power Q = q x Uo x Io x 2
Reactive power Q = q x Uo x Io x 3
Power factor COS F=?
Frequency = f |
V
A
W (for single phase products)
W(for 3-phase 3-wire two wattmeter method products)
W(for 3-phase 4-wire products)
Var (for single phase products)
Var(for 3-phase 3-wire two wattmeter method products)
Var(for 3-phase 4-wire products)
Hz |
Energy = energy output data x Uo x Io/(1000 x 3600) Kwh
Note: u, i, p, q are output data from the transducer in the form of
a percentage of the maximum value of measurable range of the transducer.
|
Current Transducer
0-55Hz~5KHz
Service 