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model
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72
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80
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96
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120
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1. Product introduction
Digital display power factor meter, it can measure the single-phase power factor, but also it can
measure the three-phase power factor，It is one kind of programming measurement, display, alarm,
digital communication and analog quantity output etc, widely used in substation automation,
distribution automation, intelligent building, automatic production lines, test bench etc..
4 high bright red LED display; optional one or two way relay alarm output, achieve upper and
lower limit alarm function; optional RS-485 digital communication interface, use the international
standard MODBUS-RTU communication protocol, with a variety of PLC, HMI, configuration software to achieve network; optional analog (DC4 ~ 20mA) variable transmission output.
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2. Technical parameters
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parameter
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performance
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Signal input
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Voltage
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range
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AC57.7V/AC100V/AC220V/450V, etc.
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overload
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Continued: 1.2 times, instantaneous: 2 times /1S
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Consumption
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＜1VA
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impedance
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＞380KΩ
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current
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range
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AC10A/5A/1A
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overload
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Continued: 1.2 times, instantaneous: 10 times /5S
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Consumption
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＜1VA
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impedance
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＜20mΩ
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frequency
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45-65HZ
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Auxiliary power supply
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Linear power supply: AC220V + 5%; power consumption < 3VA
Switching power supply: AC/DC85-265V power consumption, 3VA
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Relay output
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One or two output, contact capacity：1A/220VAC；1A/24VDC
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Analog output
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DC0～20mA、DC4～20mA、DC0～5V、DC1～5V、DC0～10V等
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RS485 communication
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RS485 communication interface, physical layer isolation, in line with the international standard MODBUS-RTU protocol
Baud rate 4800,9600, N81 data format
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Precision grade
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0.5
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Display mode
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Digital display: 4 high brightness LED digital tube
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Environmental Science
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Working temperature: -10-55 ℃; storage temperature: -20-75 ℃
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security
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Insulation: signal, power supply, output terminal to shell resistor > 5 MΩ
Voltage: signal input, power supply, output between > AC2KV
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3．1Appearance size and size of opening
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Exterior code
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Exterior dimension(mm)
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Opening size(mm)
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depth(mm)
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5
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96×48
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91×44
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85
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A
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72×72
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67×67
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85
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3
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80×80
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76×76
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85
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9
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96×96
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91×91
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85
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2
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120×120
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111×111
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85
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4. Panel button operation
4．1 Key definition
Function key SET：Used to enter the menu item, confirm the set value
Reduce key ▼：Reducing the number
Add keys ▲：Add the number
4．2 Operation method
Click SET key，▲Key to increase the number，▼Key to reduce the number , Press the SET key to confirm the setting , and enter the next set item. If you don't have the next item, exit to the measurement status.。
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5、Parameter setting
6、Function module
6．1 Relay alarm output
Relay contact capacity：1A/250VAC，1A/24VDC。
Set value = alarm power factor X1000
Relay works in the upper and lower limit alarm mode , there are two alarm parameters setting:
upper limit alarm value (the value of the secondary side) and the lower limit alarm value (the value of the secondary side), the upper limit alarm: when the measured value exceeds the limit alarm value, the high limit alarm relay works, after the upper limit alarm works, only when the measured value is
less than the upper limit alarm value, the upper limit alarm relay reset. Lower limit alarm note: when the measured value is lower than the lower limit alarm value, lower limit alarm relay, when the lower limit alarm relay action, only when the measured value is greater than the lower limit alarm value and the lower limit alarm reset relay.
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6．2 Send an analog quantity output
Send an analog quantity output optional: DC4 ~ 20mA. An analog quantity output and input signal isolation, a linear corresponding relation are widely used for PLC, DCs were collected. Precision of 0.5 grade; output current, load resistance < 500Ω, voltage output, load resistance > 100k KΩ
6．3 RS485 communication
6．3．1 communication protocol
(1) RS485 communication interface, asynchronous half duplex mode。
(2) 4800,9600bps baud rate can be set, the factory default value is 9600 BPS。
(3) Data format: N81 no parity bit, 8 data bits, 1 stop bits。
RS485 interface; connection type: asynchronous, half duplex; international standard Mudbugs RTU protocol instrument address: 1~247, baud rate 48009600, data format: N81 no parity bit, 8 data bits, 1 stop bit; the machine currently supports 03h read command.
Message format description：
Command 03H：Read command
Host request： Address + Command + data address + data length + CRC check code
1byte + 1byte + 2byte + 2byte + 2byte
Address: in order to check the instrument address code, you can set up within the 1~247, take up 1 bytes.
Command: 03H read command, the length of 1 bytes.
Data address: want to read the data starting address, occupy 2 bytes。
Data length: the length of the data word to be read.
CRC16 check code: high 8 in the front, low 8 in the post, occupy 2 bytes。
Slave response：Address + Command + data + data + CRC check code
1byte + 1byte + 1byte + byte + 2byte
Address: in response to the meter address code, the length of 1 bytes。
Command: 03H, the length is 1 bytes.
Data length: the length of the data bytes to be sent。
Data information: read the data, specific see meter parameter address table。
CRC16 check code: high 8 in the front, low 8 in the post, occupy 2 bytes。
6．3．2 Example of communication message：
Read data register (function code 03H): read power due to the value, 0.60859, the instrument address is 1。
Host read data frame：
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address
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command
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Start address (high in front)
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Register number (high in front)
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Check code (high in front)
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01H
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03H
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00H、06H
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00H、02H
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24H、0AH
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Instrument response data frame：
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address
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command
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Data length
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Data segment (4 bytes)
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Check code
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01H
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03H
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04H
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3FH、1BH、CCH、9DH
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12H,89H
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6．3．3 Modbus communication register address table
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address
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Project description
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data type
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attribute
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explain
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6、7
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power factor
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float
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R
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Meet IEE754 floating point standard
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8
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Open out value
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Short
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R
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Range: 1~9999
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IEEE754Data format description
IEEE754Is the use of 4 bytes of binary floating-point numbers to represent a data quantity, the data format and significance are as follows：
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Byte address
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BYTE1
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BYTE2
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BYTE3
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BYTE4
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Floating point content
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SEEEEEEE
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EMMMMMMM
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MMMMMMMM
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MMMMMMMM
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Symbol bit：S=0 is positive, S=1 is negative.。
Index part：Order code =E-127。
Mantissa part：Mantissa=M up to the highest level of 1
Data result：
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7、Connection mode and terminal diagram
7．1 Connection mode
Electric current transformer Voltage input
 
7．2 Terminal diagram
120*120 and 96*96 size wiring diagram
72*72 and 80*80 size wiring diagram
explain：1、If the wiring terminal is different with the actual wiring terminal which at the behind of the product , please according to the back wiring terminal
2. HO is upper limit alarm relay output, LO is the lower limit alarm relay output, AO1 for analog output。
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