0102030405
Multifunctional LCD Power Instrument from China Suppliers - Accurate Electrical Monitoring by Factory
Product Overview
There are several different types of extended function modules to choose from: The four-channel analog quantity (0~20mA/4~20mA) output can transmit electrical quantity, while the four-channel switching value input and output can monitor and control local or long-range switch signals ("remote signaling" and "remote control"). The device may immediately replace a typical power transmitter, a measuring indication instrument, an electric energy measuring instrument, and any associated auxiliary units. With modular structural design, customers may select the most cost-effective functional configuration based on their specific requirements.
It is frequently utilized in applications such as energy management systems, supply and distribution network automation, district power control, and entire switchgear sets. It has the benefit of easy installation and maintenance. Sample wiring, small quantity, programmable input parameters, and networkable with various PLCs, industry control computer communications software.
- ⚡4-Channel Analog Output: 0~20mA / 4~20mA for electrical quantity transmission
- 🔀Switching Value I/O: 4-channel input & output for remote signaling and control
- 🔧Modular Design: Flexible, cost-effective functional configuration
- 🌐Networkable: Compatible with PLCs and industrial control communication software
- 📦Easy Installation: Replaces transmitters, meters & auxiliary units directly
Technical Parameters
⚙️ Input & Output Specifications
| Technical Parameters | Index | ||
| Input | Network | Three-phase three-wire, three-phase four-wire | |
| Voltage | Rated value | AC 0~500V | |
| Over load | Consistent 1.2 times instantaneous, 2 times / 30s | ||
| Consumption | <0.5VA (each phase) | ||
| Impedance | >500kΩ | ||
| Current | Rated value | AC 1A, 5A | |
| Over load | Consistent: 1.2 times instantaneous, 2 times / 1s | ||
| Impedance | <2mΩ | ||
| Frequency | 45–65Hz | ||
| Output | Electric Energy | Output mode | Two-channel open-collector, optical coupling pulse output |
| Pulse constant | Active: 3200 imp/kWh | Reactive: 3200 imp/kVarh | ||
| Start | On the condition of rated voltage, reference frequency and cos=1.0, when load operational current is 0.01ln, it can start and measure the electric energy continuously. | ||
| Creep | When exceeding 115% rated voltage and no current in the current circuitry, the instrument has no electric energy accumulation and pulse output. | ||
📡 Communication, Analog & Switching Value Output
| Output | Communication | Output mode | RS485 |
| Protocol | MODBUS_RTU | ||
| Baud rate | 1200, 2400, 4800, 9600 | ||
| Analog Quantity | Channel quantity | 4 channels | |
| Output mode | 0–20mA, 4–20mA | ||
| Load ability | <400Ω | ||
| 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 | LCD (Blue back lighting) | ||
| Measuring Accuracy | Voltage, Current | ± (0.5%FS + one digit) | |
| Active power, Reactive power | ± (0.5%FS + one digit) | ||
| Frequency | ± 0.1Hz | ||
| Power factor | ± 0.01PF | ||
| Active energy | ± 0.5% (only for reference, not for meterage) | ||
| Reactive energy | ± 1.0% (only for reference, not for meterage) | ||
| Source | Scope | AC 220V, 50/60Hz | |
| Consumption | <5VA | ||
| Safety | Withstand Voltage | Input and source | >2kV 50Hz / 1min |
| Input and output | >1kV 50Hz / 1min | ||
| Output and source | >2kV 50Hz / 1min | ||
| Insulating resistance | Any two of input, output, source, casing >20MΩ | ||
| Environment | Temperature | Operation: -10°C ~ 50°C | |
| Storage: -25°C ~ 70°C | |||
| Humidity | ≤85%RH, free of wet and corrosive gas | ||
| Elevation | ≤3000m | ||
📋 Function & Model Selection Table
| Function & Shape / Model | Measure & Display | Shape Code | Selected Additional Functions | ||||||||||||||||||||
| Phase Voltage V | Line Voltage | Current | Frequency | Power Factor | Active Power | Total Reactive Power | Total Apparent Power | Each Phase Power Factor | Each Phase | Apparent Power | Active Energy | Reactive Energy | ⑨ 96×96 | ⑧ 80×80 | ⑦ 72×72 | Communication RS485 | 4-ch Switch Outputs | 4-ch Switch Input | 4-ch Analog Output | Harmonic | |||
| SFS-□S3-3E | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | ||||||||||||
| SFS-□SY-3E | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | |||||||||
| SFN-□S3-3E | ● | ● | ● | ● | ● | ● | ● | √ | √ | + | |||||||||||||
| SFN-□SY-3E | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | √ | √ | + | |||||
| SFN-□S3-3E+4DO | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | + | |||||||||||
| SFN-□SY-3E+4DO | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | + | ||||||
| SFN-□S3-3E+4DI | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | + | |||||||||||
| SFN-□SY-3E+4DI | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | + | ||||||
| SFN-□S3-3E+4AO | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | + | |||||||||||
| SFN-□SY-3E+4AO | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | + | ||||||||
| SFN-□SY-3E+H | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | ● | √ | + | + | |||||||
Frequently Asked Questions (FAQ)
❓ What types of network configurations does this power meter support?
The meter supports both three-phase three-wire and three-phase four-wire network configurations, making it suitable for a wide range of industrial and commercial power distribution systems.
❓ What communication protocol does the device use, and what baud rates are supported?
The device uses the RS485 communication interface with MODBUS_RTU protocol. Supported baud rates include 1200, 2400, 4800, and 9600 bps, allowing flexible integration with PLCs and industrial control systems.
❓ What are the available extended function modules for this meter?
Several optional modules are available, including: 4-channel analog output (0–20mA / 4–20mA), 4-channel switching value output (relay contact), 4-channel switching value input (dry contact), and a harmonic measurement module. Customers can select the combination that best fits their application requirements.
❓ What is the measuring accuracy for voltage, current, and power parameters?
The meter offers ±(0.5%FS + one digit) accuracy for voltage, current, active power, and reactive power. Frequency accuracy is ±0.1Hz and power factor accuracy is ±0.01PF. Active and reactive energy readings are for reference only and not intended for billing/meterage purposes.
❓ What are the operating environment requirements for this device?
The device operates within a temperature range of -10°C to 50°C and can be stored at -25°C to 70°C. Humidity should be ≤85%RH with no corrosive or condensing gases present. The maximum installation altitude is 3000 meters above sea level.
❓ Can this meter replace existing power transmitters and measuring instruments directly?
Yes. The device is designed to directly replace conventional power transmitters, measuring indication instruments, electric energy measuring instruments, and their associated auxiliary units. Its modular design and programmable input parameters make it a highly flexible and cost-effective upgrade for energy management and distribution automation systems.