EM735 three phase din rail install  wattmeter programmable energy meter 

 

 

Benefits and Main Features

 Three phase metering

 Standard DIN rail Format (DIN43880)

CI.1 Accuracy (EN50470)

Energy consumption LED

Isolate pulse output and IR (DIN43864)

LCD display, 5 integer 2 decimal

 Large clear backlight display

 Internal transformer

Direct metering up to 100A,transformer metering 1.5(6)A

 27 CT rate can be selected

Optional single-phase model

Smart communication port RS485

Program by button on the nameplate

Memory back-up (EEprom)

7 DIN modules

CE approval

 

 

Meter specification

 

	Direct connected meters	Transformer connected meter
Voltage(v)	3×57.7/100V	3×57.7/100V
	3×220/380V	3×220/380V
	3×230/400V	3×230/400V
Operational voltage	±70%Un	±70%Un
Current(A)
- Iref	10A	1.5
-Itr	1A	0.15A
-Imax	100A	6A
-Imin	0.5A	0.015A
-Ist	40mA	3mA
	Direct connected meters	Transformer connected meter
Power consumption of current circuits(VA)	< 0.01	< 0.01
Power consumption of voltage circuits(W)	< 1.3W	< 1.3W
General data
Frequency (Hz)	50/60	50/60
Memory back-up	EEprom	EEprom
Environment resistance to heat and fire	Terminal 960°C Cover 650°C	Terminal 960°C Cover 650°C
Enclosure material
upper	ABS+PC	ABS+PC
lower	ABS+PC	ABS+PC
Pulse output
Pulse width(ms)	80	80
Pulse constant(imp/kWh)	400	1600
LED
LED constant	400	1600
Dimension
Width (mm)	126	126
Height (mm)	104.5	104.5
Depth (mm)	60	60

 

 

Reading the meter

The smart energy meter is equipped with 6+1 LCD display, which is used as recording consumption and can’t be reset to zero. The number system is based on units of 10. And unit is kWh.

Another way through RS485 and PC software or HHU(hand held unit)unit can read power consumption

 

Pulse output

Smart din rail energy meter is equipped with a pulse output which is fully separated from the inside circuit. That generates pulses in proportion to the measured energy. They are test pulse output (pins 24 & 25). Usually, the test pulse output is used as testing accuracy or reading purpose in close quarters.

The test pulse output is a polarity dependant, passive transistor output requiring an external voltage source for correct operation. For this external voltage source, the voltage (Ui) should be 5-27V DC, and the maximum input current (Imax) should be 27mA DC. To connect the impulse output, connect 5-27V DC to connector 25 (anode), and the signal wire (S) to connector 24 (cathode). The meter pulses is indicated on the front panel.

 

Far Infrared interface

The far infrared communication port is on the right of LCD screen. It is infrared wireless communication port. HHU(hand held unit) can directly communicate the data between the meter and this port.The data transmission speed is 1200bps.The communication distance is not less than 5m.

 

Communication port

Smart meter has equipped communication port, we can program the meter’s operation data or reading via these 2 ports.(Pin26 pin27) .

	RS485 output
Protocol	Modbus RTU
Data format	8 data bit,Even,1 stop bit
Baud rate	1200(option),2400,4800,9600
Address range	1-256 User settable
Bus loading	64pcs
Cable	AWG18

   

Programming

 By pressing the keys “SET” starts menu programming mode.

 

password verify

On the smart meter display will appear : CodE followed by the currently memorized value . With the set key, you can move the cursor to the right .Use the page down and page up. page up button can setup the Number from first two digits from 00 to 25.

for example: 000 to 250

Page down button can setup the number the third digit from 0 to 9.

 for example: 000 to 009

 

CT rate setting

On the smart meter display appear: CT followed by the currently memorized value .With the set key, you can move the cursor to the right . Use the page down and page up, you can set one of the following values:

5:5        125:5     400:5     1000:5     2500:5     7500:5

50:5       150:5     500:5     1200:5     3000:5

60:5       200:5     600:5     1500:5     4000:5

75:5       250:5     750:5     2000:5     5000:5

100:5      300:5     800:5     2400:5     6000:5

 Close the new settings, press the “set” key

 

Baud rate setting

On smart meter display will appear: bAUd followed by the currently memorized value

With the “Set” key, you can move the cursor to the right . With the page down and page up, you can set one of the following values:

1200=1200bit/sec

2400=2400bit/sec

4800=4800bit/sec

9600=9600bit/sec

 

Address setting

On smart meter display will appear: Addr  followed by the currently memorized value

With the “Set” key, you can move the cursor to the right . With the page down and page up, you can set one of the following values:

      001

      ……

      ……

      255

 

Noted: modbus address rage is 001---to 255

 

 

 

                 

 

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