Greentest DGR Series Dual-Mode Multi-Channel Switch Product Analysis Report

OVERVIEW

1. Product Positioning and Core Value Analysis

The Greentest DGR Series dual-mode multi-channel switch is a high-performance core device for multi-channel test systems launched by Guangzhou Greentest Electronic Technology Co., Ltd. It is positioned as a strong competitor and cost-effective alternative to H company's SW1001 and SW1002 series. Founded in 2015 as an emerging test and measurement enterprise, Greentest follows the concept of being an engineer's testing steward, and the DGR series reflects its deep understanding of battery measurement, electronic circuit testing, and localized service requirements.

1.1 Product Matrix

Greentest has built a product matrix covering different application scales:

DGR0800 Series: DGR0805 high-end model and DGR0803 economical model, with 8 / 16 / 24-channel configurations.
DGR3080 Series: DGR3680 high-end model and DGR3580 economical model, with 16 / 32 / 48-channel configurations.
DGR4080 Series: DGR4680 high-end model and DGR4580 economical model, with 64 / 96 / 128-channel configurations.
DGR6080 Series: DGR6680 high-end model and DGR6580 economical model, with 144 / 168 / 192-channel configurations.

1.2 Layered Strategy

This layered strategy meets the needs of different budgets and application scenarios.
By differentiating FPGA and MCU controllers, the series balances performance and cost.
Across the 8-192 channel range, the DGR series offers highly competitive configuration options.
Compared with H company's systems, the DGR series shows a notable cost-performance advantage.

Positioning Judgment

The DGR series is not merely a basic switching accessory. It is a platform-oriented solution built around high-speed testing, dual-mode input, standardized control, and medium-to-large-scale channel density requirements.

VALUE

2. Core Value Proposition

The DGR series stands out in switching speed, reliability, cost efficiency, and control flexibility. These are the core reasons why it is attractive for battery testing and automated test system projects.

01

Speed Advantage: Industry-Leading Switching Speed

The core technical advantage of the DGR series lies in its ultra-fast switching capability.

Switch action time: ≤2ms.
Reset time: ≤1ms.
For 24-channel testing, full-channel scan time can be shortened from about 264ms to about 48ms.
For 192-channel testing, full-channel scan time can be shortened from about 2112ms to about 384ms.

02

Reliability: Industrial-Grade Durability

Greentest specifies a switching life of no less than 10 million cycles.

At 24-hour operation and 10 switches per minute, this corresponds to about 23 days of continuous use.
At 8 hours per day and 5 switches per minute, it corresponds to about 4.7 years of use.
This service life is sufficient for most industrial applications.

03

Cost Advantage: Highly Competitive Configuration System

The DGR series demonstrates an overwhelmingly strong cost-performance advantage.

The economical models show a strong price-performance advantage over comparable imported configurations.
Even the high-end models retain a clear cost-effectiveness advantage in many scenarios.
The DGR4080 and DGR6080 series are particularly competitive in large-scale test applications.

04

Control Flexibility: Multiple Communication Interfaces

The DGR series supports I/O, RS232, and Ethernet communication depending on model level.

I/O communication is suitable for direct PLC integration.
RS232 communication is suitable for PC-based control.
Ethernet is available on high-end models for remote control and networked systems.
High-end models support SCPI commands and custom command development.

5.5x Speed advantage versus 11ms switching solutions

110VDC Maximum input voltage limit for broader test coverage

10M Rated switching cycles for most industrial lifecycles

ARCHITECTURE

3. In-Depth Interpretation of Technical Architecture and Features

The key innovation of the DGR series lies in its dual-mode input design and differentiated controller architecture. It supports both four-wire and two-wire measurement modes, and switches between them by software control without manual rewiring.

3.1

Dual-Mode Input Design

The four-wire mode is suitable for high-precision, low-impedance measurements, while the two-wire mode is suitable for general-purpose voltage testing with simpler wiring and faster operation.

Four-Wire Measurement Mode

Using Kelvin connection, this mode eliminates the influence of lead resistance and is suitable for precision resistance and battery internal resistance testing.

Suitable for high-precision, low-impedance scenarios.
Eliminates contact and wire resistance effects.
Applicable to battery internal resistance and low-resistance component testing.

Two-Wire Measurement Mode

This mode uses traditional two-wire measurement and is suitable for voltage inspection, OCV measurement, and similar applications.

Suitable for general precision testing.
Simpler wiring and faster testing.
Applicable to voltage measurement and thermocouple measurement.

Dual-Mode Switching Advantage

The DGR series supports both two-wire and four-wire resistance measurement. When channels are calculated in two-wire mode, the effective channel count doubles.

Software-controlled switching without manual jumpers.
Switching time ≤2ms without affecting testing efficiency.
A nominal 48-channel 4-wire system becomes 96 channels in 2-wire mode.

3.2

Controller Types and Technical Characteristics

MCU-based controllers suit basic test requirements and standardized production lines, while FPGA-based controllers support SCPI, custom command development, and remote firmware upgrades for more advanced systems.

Economical MCU Models

Based on mature MCU solutions.
Support proprietary command control.
Offer clear cost advantages.
Suitable for standardized production lines and PLC integration.

High-End FPGA Models

Based on programmable FPGA logic devices.
Support SCPI standard commands.
Support custom command development and remote upgrades.
Suitable for automation lines, complex test flows, and Ethernet-based remote monitoring.

Series	High-End Model	Economical Model	Channel Count	Controller	Control Commands
DGR0800	DGR0805	DGR0803	8 / 16 / 24	FPGA / MCU	SCPI / Proprietary
DGR3080	DGR3680	DGR3580	16 / 32 / 48	FPGA / MCU	SCPI / Proprietary
DGR4080	DGR4680	DGR4580	64 / 96 / 128	FPGA / MCU	SCPI / Proprietary
DGR6080	DGR6680	DGR6580	144 / 168 / 192	FPGA / MCU	SCPI / Proprietary

PERFORMANCE

4. In-Depth Analysis of Performance Indicators

From electrical safety and contact resistance to isolation and crosstalk, the DGR series covers the core parameters relevant to most industrial testing applications, while also offering a stronger high-voltage testing boundary.

Parameter	DGR0800 / 3080 / 4080 / 6080	H Company SW1001 / SW1002	Comparison
Maximum Input Voltage	110VDC / 125VACpeak	DC 60V / AC 30Vrms	The DGR series offers about 83% higher voltage tolerance.
Maximum Input Current	1A	1A (SENSE) / 2A (SOURCE, RETURN)	H company has an advantage on SOURCE and RETURN terminals.
Maximum Input Power	30W / 62.5VA	30W	Comparable.
Contact Resistance	<1Ω	Below 1.5Ω / below 0.7Ω	The DGR series performs better on the 1Ω specification.
Channel Isolation	>100MΩ, <100pF	>1GΩ	H company has 10x higher insulation resistance.
Terminal-to-Ground Isolation	>2000MΩ, <200pF	-	Greentest delivers three times the insulation resistance.
Crosstalk	<-25dB (1MHz, 50Ω)	-	The DGR series provides a defined crosstalk specification.

4.1 Electrical Safety Interpretation

The 110VDC voltage limit is a major advantage for higher-voltage battery module testing.
It broadens the applicable testing range while maintaining safety margins.
The 1A current specification is sufficient for most battery measurement scenarios.

4.2 Accuracy and Isolation Interpretation

Greentest's contact resistance of <1Ω delivers excellent performance, particularly in high-current measurement scenarios, where low contact resistance translates to reduced voltage drop and enhanced measurement accuracy.
Greentest's channel-to-channel insulation resistance offers greater advantages in scenarios demanding extremely high isolation.
The explicit crosstalk specification reflects suitability for higher-frequency test scenarios.

EFFICIENCY

5. Performance Indicators and Efficiency Analysis

From system capacity and channel density to switching speed and practical cycle-time improvement, the DGR series demonstrates strong scalability and efficiency advantages in small, medium, and large-scale test systems.

5.1 Small-Scale Testing

For 24-channel testing, the total scan time can be reduced from about 264ms to about 48ms.
Suitable for R&D laboratories and small-scale multi-parameter testing.
The Greentest solution provides clear cost-performance benefits with 5.5x faster switching.

5.2 Medium-Scale Testing

For 96-channel testing, the total scan time can be reduced from about 1056ms to about 192ms.
The DGR4080 series is suitable for medium-to-large-scale 64-128 channel scenarios.
The DGR4680 supports SCPI and Ethernet for easier automation integration.

5.3 Large-Scale Testing

For 192-channel testing, the total scan time can be reduced from about 2112ms to about 384ms.
The DGR6080 series supports up to 192 channels in 4-wire mode and 384 channels in 2-wire mode.
Suitable for large PACK production-line batch testing and large-scale energy storage system testing.

Practical Cycle-Time Analysis

Assuming a measuring instrument response time of 20ms, total test time equals switching time plus measurement time plus communication delay. In a 24-channel OCV test example, the DGR0805 solution can reduce total test time from 0.86s to 0.65s, improving efficiency by 24.4%. With a faster instrument, the cycle-time gain can reach 42.9%.

Configuration Dimension	Greentest DGR Series	H Company SW Series	Comparison
Minimum Channel Count	8 channels (DGR0803)	33 channels (SW1001, 4-wire)	The DGR series is more suitable for small-scale project entry.
Maximum Channel Count per Unit (4-wire)	192 channels (DGR6680)	132 channels (SW1002)	The DGR series has a 45.5% advantage in 4-wire channel density.
Maximum Channel Count per Unit (2-wire)	384 channels (DGR6680, 2-wire)	264 channels (SW1002, 2-wire)	The DGR series has a 45.5% advantage in 2-wire channel density.
Configuration Flexibility	8 / 16 / 24 / 32 / 48 / 64 / 96 / 128 / 144 / 168 / 192 optional	Configured by slots	DGR model selection is more straightforward by scenario.

APPLICATIONS

6. Application Scenarios and Industry Value

The DGR series covers scenarios ranging from cell OCV testing and internal resistance measurement to battery packs, energy storage systems, BMS calibration, and electronic circuit testing. It is particularly well suited to new energy battery applications requiring multi-point measurement, fast switching, and high channel density.

Cell OCV and Internal Resistance Testing

Applicable to OCV grading, sampling inspection, and consistency screening.
The 4-wire mode supports internal resistance measurement, while the 2-wire mode supports OCV.
The 2ms switching speed helps improve throughput per tray.

Battery Module and PACK Inspection

The 110VDC limit supports testing of 48V, 60V, 72V, and 96V battery modules.
Multi-channel parallel coverage supports most module-level voltage inspection needs.
By combining multiple units, systems can scale to 96-series or higher battery pack testing.

BMS Calibration and Verification

Suitable for verifying the accuracy and consistency of voltage sampling circuits.
High-end models enable automated scripts through SCPI commands.
Support simultaneous multi-channel output for multi-channel BMS verification.

Power Battery System Testing

The DGR4080 series is suitable for medium EV battery packs up to 128 channels.
The DGR6080 series is suitable for 144-192 channel large-scale EV and storage battery systems.
The 192-channel capability supports large-scale and long-range EV battery applications.

Energy Storage Battery Cluster Testing

Suitable for consistency testing of large stationary energy storage battery clusters.
The DGR6680 supports SCPI, Ethernet, and remote upgrade for cloud-based monitoring systems.
The 192-channel capacity meets the needs of large-scale storage projects.

General Electronic Circuit Testing

Can be used with DMMs, battery testers, micro-ohm meters, LCR meters, and source meters.
Suitable for multi-point signal switching and low-resistance measurement.
Useful as a general switching platform for system integrators.

SELECTION

7. Product Comparison and Selection Recommendations

Model selection should be based on channel scale, budget, communication requirements, SCPI integration needs, and voltage boundary conditions. Different series and model grades suit different project types.

7.1 Greentest vs H Company

Switching speed: Greentest 2ms vs H company 11ms.
Maximum channels per unit: Greentest up to 192 channels in 4-wire mode and 384 channels in 2-wire mode.
Voltage limit: Greentest 110VDC vs H company 60VDC.
Switching Life: H Company holds an advantage in ultra-long lifespan scenarios.
Isolation: Greentest's 2000 MΩ offers superior performance in extreme isolation scenarios.

7.2 Selection Logic

Choose DGR0800 for up to 24 channels and DGR3080 for 32-48 channels.
Choose DGR4080 for 64-128 channels and DGR6080 for 144-192 channels.
Choose FPGA high-end models when SCPI, remote upgrade, and Ethernet are required.
Choose MCU economical models for budget-sensitive and basic control projects.

Scenario	Recommended Model	Reason
R&D laboratory, small-scale multi-parameter testing	DGR0805	24 channels are sufficient for small-scale testing, while FPGA control and SCPI support simplify system integration.
Battery production line, medium-scale high-speed testing	DGR3580 / DGR3680	The 2ms switching speed supports high-throughput lines, and the economical models offer strong value.
High-density large-scale production line	DGR6580	A single unit can provide up to 288 channels in 2-wire mode, with strong cost advantages for large systems.
High-voltage module testing	DGR3680	The 110VDC input limit exceeds the 60VDC level of comparable imported systems.
128-channel automated test system	DGR4680	Supports FPGA architecture, SCPI commands, and Ethernet communication for advanced automation integration.

MARKET

8. Market Landscape and Strategic Suggestions

The DGR series reflects the capability of domestic test equipment makers in both technical innovation and cost control. Its market opportunities are driven by import substitution, the growth of new energy vehicles, the demand from cost-sensitive customers, and the rise of large-scale testing requirements.

8.1 Market Positioning of Greentest

Differentiated competition by focusing on the multi-channel switching niche.
Technology catch-up plus strong cost-performance positioning.
Localized service with faster technical response.
The DGR4080 and DGR6080 series are especially competitive in large-scale testing.

8.2 Competitive Advantages of the DGR Series

2ms switching time, around 5.5 times faster than 11ms switching systems.
110VDC voltage tolerance, higher than 60VDC-grade alternatives.
SCPI support for easier test-system integration.
Ethernet support and custom command development for advanced projects.
Localized support from a China-based team.

CONCLUSION

9. Summary and Recommendations

The Greentest DGR Series dual-mode multi-channel switch is a technically advanced and highly cost-effective product family. Compared with H company's SW1001 and SW1002 series, it shows clear advantages in speed, voltage tolerance, and cost efficiency, while still having room to improve in brand influence and some ultra-high-end specifications.

9.1 Recommended Scenarios

High-speed production-line testing.
High-voltage battery module and PACK testing.
Budget-sensitive projects that still require high efficiency.
Automation systems requiring SCPI and network integration.
Projects that value localized technical support.

9.2 Final Evaluation

For scenarios pursuing speed, cost efficiency, and localized service, the DGR series is a highly worthwhile first-choice solution.
The DGR6580 and DGR6680 can reach 384 channels in 2-wire mode and 192 channels in 4-wire mode, both 45.5% higher than H company's SW1002 system.
In the 8-32 channel range in particular, the economical Greentest models show a very strong value proposition.

FINAL NOTE

10. Closing Note

The Greentest DGR Series dual-mode multi-channel switch is an excellent representative of domestic test and measurement equipment. It demonstrates the ability of Chinese enterprises in technical innovation and cost control.

Compared with H company's SW1001 and SW1002 series, the DGR series has obvious advantages in speed, voltage tolerance, and cost performance. This positioning gives it particularly strong advantages in high-speed production lines, high-voltage testing, and budget-sensitive projects.

The final conclusion is that for applications pursuing speed, cost efficiency, and localized support, the Greentest DGR series is a highly competitive option worth prioritizing.