0102030405
Multifunctional LED Watch: High-Precision Power Measurement Instrument from China Suppliers and Factory
๐ Product Overview
Many kinds of extended function modules for choosing: four-channel analog quantity (0~20mA / 4~20mA) output can realize the transmitting output function of electrical quantity; four-channel switching value input and four-channel switching value output to realize the local or long-range switch signal monitoring and control output function (function of "remote signaling" and "remote control"). The instrument can directly replace conventional power transmitter, measuring indicating instrument, electric energy measuring instrument and the related auxiliary unit. With modular structural design, users can choose the most economical functional configuration according to the actual requirement, which is highly cost-effective.
It is widely used in occasions of energy management systems, supply and distribution network automation, district power control and complete sets of switchgear. It has the advantages of convenient installment and maintenance, simple wiring, small quantity, programmable input parameters and capable of the network with different PLC, industry control computer communications.
- 4-Channel Analog Output (0~20mA / 4~20mA)
- 4-Channel Switching Value Input & Output
- RS485 Communication / MODBUS-RTU Protocol
- Modular Design โ Cost-Effective Configuration
- Compatible with PLC & Industrial Control Computers
- Suitable for Energy Management & Distribution Automation
โ๏ธ Technical Parameters
| Technical Parameters | Index | ||
|---|---|---|---|
| Input | Network | Three-phase three-wire, Three-phase four-wire | |
| Voltage | Rated Value | AC 0~500V | |
| Overload | Consistent 1.2 times instantaneous; 2 times / 30s | ||
| Consumption | <0.5VA (each phase) | ||
| Impedance | >500kฮฉ | ||
| Current | Rated Value | AC 1A, 5A | |
| Overload | Consistent: 1.2 times instantaneous; 2 times / 1s | ||
| Impedance | <2mฮฉ | ||
| Frequency | 45โ65 Hz | ||
|
Output (Electric Energy) |
Output Mode | Two-channel open-collector, optical coupling pulse output | |
| Pulse Constant | Active: 3200 imp/kWh ย |ย Reactive: 3200 imp/kvarh | ||
| Start | On the condition of rated voltage, reference frequency and cosฯ=1.0, when load current is 0.01In, it can start and measure the electric energy continuously. | ||
| Creep | When applying 115% rated voltage and no current in the current circuitry, the instrument has no electric energy accumulation and pulse output. | ||
| Technical Parameters | Index | ||
|---|---|---|---|
| Output | Communication | Output Mode | RS485 |
| Protocol | MODBUS_RTU | ||
| Baud Rate | 1200, 2400, 4800, 9600 | ||
| Analog Quantity | Channel Quantity | 4 channels | |
| Output Mode | 0โ20mA, 4โ20mA | ||
| Load Ability | <400ฮฉ | ||
| Switching Value | Channel Quantity | 4 channels | |
| Output Mode | Normally open relay contact output | ||
| Contact Capability | AC 240V / 2A | ||
| Switching Value Input | Four-channel dry contact input modes | ||
| Display Mode | LED (RED) | ||
| Measuring Accuracy | Voltage, Current | ยฑ (0.5%FS + one digit) | |
| Active Power, Reactive Power | ยฑ (0.5%FS + one digit) | ||
| Frequency | ยฑ 0.1 Hz | ||
| Power Factor | ยฑ 0.01 PF | ||
| Active Energy | ยฑ 0.5% (for reference only, not for meterage) | ||
| Reactive Energy | ยฑ 1.0% (for reference only, not for meterage) | ||
| Power Source | Scope | AC 220V, 50/60 Hz | |
| Consumption | <5VA | ||
| Safety | Withstand Voltage | Input & Source | >2kV 50Hz / 1min |
| Input & Output | >1kV 50Hz / 1min | ||
| Output & Source | >2kV 50Hz / 1min | ||
| Insulating Resistance | Any two of input, output, source, casing >20Mฮฉ | ||
| Environment | Temperature | Operation: -10 ~ 50ยฐC | |
| Storage: -25 ~ 70ยฐC | |||
| Humidity | โค85% RH, free of wet and corrosive gas | ||
| Elevation | โค3000m | ||
๐ Model Selection Guide
| Function & Model | Measure & Display | Shape Code | Selected Additional Functions | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Phase Voltage | Line Voltage | Current | Frequency | Power Factor | Active Power | Total Reactive Power | Total Apparent Power | Each Phase Power Factor | ย | Each Phase | Apparent Power | Active Energy | Reactive Energy | โจ 96ร96 | โง 80ร80 | โฆ 72ร72 | RS485 | 4-CH Switch Out | 4-CH Switch In | 4-CH Analog Out | Harmonic | ||
| SFS-โกS3-3E | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | ||||||||||||
| SFS-โกSY-3E | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | |||||||||
| SFN-โกS3-3E | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | |||||||||||||
| SFN-โกSY-3E | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | |||||
| SFN-โกS3-3E+4DO | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | + | |||||||||||
| SFN-โกSY-3E+4DO | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | + | ||||||
| SFN-โกS3-3E+4DI | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | + | |||||||||||
| SFN-โกSY-3E+4DI | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | + | ||||||
| SFN-โกS3-3E+4AO | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | + | |||||||||||
| SFN-โกSY-3E+4AO | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | + | ||||||||
| SFN-โกSY-3E+H | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | โ | + | + | |||||||
โ Frequently Asked Questions
What communication protocols does this instrument support?
The instrument supports RS485 communication interface with MODBUS_RTU protocol. It offers selectable baud rates of 1200, 2400, 4800, and 9600 bps, making it compatible with most PLCs and industrial control computer systems.
What types of analog output does the instrument provide?
The instrument features four-channel analog quantity output supporting both 0โ20mA and 4โ20mA current loop signals. The load ability is less than 400ฮฉ, suitable for transmitting various electrical quantity measurements to remote monitoring systems.
What is the measuring accuracy for voltage and current?
The measuring accuracy for voltage and current is ยฑ(0.5%FS + one digit). Active and reactive power accuracy is also ยฑ(0.5%FS + one digit), frequency accuracy is ยฑ0.1Hz, and power factor accuracy is ยฑ0.01PF.
What power supply does the instrument require?
The instrument operates on AC 220V at 50/60Hz with a power consumption of less than 5VA. It supports both three-phase three-wire and three-phase four-wire network configurations with a rated voltage range of AC 0~500V.
What enclosure sizes are available for this instrument?
The instrument is available in three panel-mount enclosure sizes: 96ร96mm (code โจ), 80ร80mm (code โง), and 72ร72mm (code โฆ). Different models in the SFS and SFN series are available in one or more of these form factors.
What are the operating environment requirements for this instrument?
The instrument operates within a temperature range of -10ยฐC to +50ยฐC and can be stored at -25ยฐC to +70ยฐC. Relative humidity should be โค85%RH with no condensation or corrosive gases. Maximum installation altitude is 3000m above sea level.