NEWPWR NPEXA C27 Linear Resistance Isolator Zener Barrier DIN Rail
Industrial automation systems frequently encounter measurement errors and signal attenuation when transmitting analog data from slide wire potentiometers or position sensors across long distances. Environmental noise, lead wire resistance, and potential differences between ground loops in hazardous zones compromise control accuracy. The NEWPWR linear resistance isolator zener barrier resolves these issues by delivering secure electrical isolation and high-precision signal conversion for industrial environments.
Operating on an independent power supply configuration, the unit ensures complete three-port isolation among input, output, and power circuitry. Designed with intrinsic safety features, it safely interfaces with process instrumentation located in explosive areas while maintaining signal integrity. Engineers rely on this device to protect control systems from high-voltage surges and electromagnetic interference without degrading the original sensor measurements.
Technical Specifications
Power Supply: 18 ~ 60 V DC
Input Signal: 18 ~ 400 Ω
Lead Wire Resistance: ≤ 20 Ω/line
Output Signal: 1 : 1
Excitation Current: 0.1 ~ 10 mA
Response Time Ta: ≤ 500 ms
Working Power Consumption: 0.4 W
Electromagnetic Compatibility: IEC 61326-3-1
Dielectric Strength: ≥ 3000 V AC @ Intrinsically safe side and non-intrinsically safe side
Dielectric Strength Power: ≥ 1500 V AC @ Power supply and non-intrinsically safe side
Insulation Resistance: ≥ 100 MΩ @ Input/Output/Power
Operating Temperature: -20 ℃ ~ +60 ℃
Storage Temperature: -40 ℃ ~ +80 ℃
Application Location: Installed in safe area @ Connecting to Zone 0, Zone 1, Zone 2; IIA, IIB, IIC, IIIC; T4 ~ T6 hazardous area intrinsically safe equipment
Output State: Following input signal in full range except break wire @ Break wire output approx 16 Ω, max not exceeding 430 Ω
Connection Type: Screw connection
Dimensions: Width 17.8 mm × Height 110 mm × Depth 117 mm
Mounting Type: DIN 35 mm rail mounting
Product Certifications: CNEX, CE, FCC, CCC
Explosion Protection Rating: [Ex ia Ga] IIC, [Ex ia Da] IIIC
Maximum Voltage Um: 250 V
Parameters Uo: 8.7 V @ Terminals 1 and 3; Terminals 2 and 3
Parameters Io: 33 mA @ Terminals 1 and 3; Terminals 2 and 3
Parameters Po: 72 mW @ Terminals 1 and 3; Terminals 2 and 3
Parameters Co: 5 μF @ Terminals 1 and 3; Terminals 2 and 3
Parameters Lo: 3 mH @ Terminals 1 and 3; Terminals 2 and 3
Core Specifications & Shared Features
The NEWPWR C-series resistance isolators share a robust foundation of electrical and mechanical specifications engineered for rigorous industrial applications. All models within this product family accept a linear resistance input ranging from 18 to 400 Ω, matching standard industrial potentiometers and resistance-based transducers. The internal excitation current is regulated between 0.1 and 10 mA to prevent excessive self-heating of the connected sensing elements.
Signal transmission follows a strict 1 : 1 linear conversion profile, ensuring that the output value precisely tracks the input across the entire operational range. Electrical safety is maintained through a rigorous three-port isolation scheme, backed by a dielectric strength of 3000 V AC between the intrinsically safe and non-intrinsically safe terminals. Furthermore, the units feature an integrated online self-diagnostic function that continuously monitors internal circuit status to detect operational anomalies early.
Model Lineup & Channel Comparison
The NEWPWR C-series linear resistance barrier family offers three distinct configurations to address varying channel density requirements in control cabinets.
- NPEXA-C27: This is the standard single-channel model featuring a one-input and one-output configuration. It is designed for conventional single-loop applications requiring isolated linear resistance transmission from hazardous to safe areas.
- NPEXA-C277: This model provides a single-input and dual-output structure, allowing one field resistance signal to be split and transmitted independently to two separate control or monitoring systems in the safe area.
- NPEXA-C2D77: This high-density variant features a dual-channel, two-input and two-output architecture. It optimizes DIN rail space in crowded control cabinets by housing two completely independent isolation circuits within a single 17.8 mm wide enclosure.
Practical Selection Advice
When specifying these isolation barriers for a control system upgrade or a new installation, engineers should first evaluate channel density and loop requirements. For single-loop applications, the base NPEXA-C27 provides a cost-effective and straightforward solution. When a single sensor signal must be shared between a primary control system and a secondary recording or safety system, the NPEXA-C277 eliminates the need for external signal splitters.
Cabinet space optimization is another critical factor. In large-scale projects with numerous resistance inputs, selecting the dual-channel NPEXA-C2D77 significantly reduces physical footprint and wiring complexity. Beijing Zhongping Technology provides expert technical support to help engineering teams verify loop parameters, match explosion protection ratings, and select the optimal model configuration for specific industrial environments.
System Integration and Hardware Setup
Proper mechanical and electrical installation ensures optimal performance and safety compliance of the isolation barrier. The unit is designed for standard DIN 35 mm rail mounting, allowing seamless integration into existing control panel layouts alongside other modular automation hardware. Secure screw terminal connections accommodate field wiring while maintaining robust mechanical retention under industrial vibration conditions.
Field cabling must adhere to intrinsic safety separation guidelines, keeping intrinsically safe wiring physically separated from non-intrinsically safe power and signal lines. Shielded twisted pair cables are recommended for input connections to minimize electromagnetic interference from nearby variable frequency drives or high-power switching equipment. Proper grounding of the control cabinet and rail system prevents ground loops and maintains the integrity of the 3000 V AC electrical isolation barrier.
Reliability and Environmental Durability
Engineered for continuous duty in harsh industrial environments, the device operates reliably within a temperature range of -20 ℃ to +60 ℃. The compact enclosure measures only 17.8 mm in width, maximizing panel real estate without compromising thermal dissipation. Internal components are optimized for a low working power consumption of just 0.4 W, which minimizes internal heat accumulation inside enclosed control cabinets.
Compliance with IEC 61326-3-1 electromagnetic compatibility standards ensures stable operation in electrically noisy environments such as power plants, chemical refineries, and manufacturing shop floors. The robust insulation resistance of ≥ 100 MΩ across all ports prevents leakage currents, while rigorous factory testing guarantees long-term operational stability and a high mean time between failures.
Frequently Asked Questions (FAQ)
1. What is the current local inventory status and typical delivery schedule for these isolators?
Beijing Zhongping Technology maintains a comprehensive stock of standard NEWPWR isolation barriers to ensure rapid order processing, with most standard models available for immediate dispatch to minimize project downtime.
2. What warranty coverage and RMA support procedures apply to these units?
All supplied hardware is backed by a standard 12-month manufacturer warranty, supported by Beijing Zhongping Technology through professional pre-shipment quality checks and streamlined return merchandise authorization processing.
3. What are the electrical power supply requirements and power consumption characteristics?
The unit operates on a flexible power supply range of 18 to 60 V DC with a low operational power consumption of 0.4 W.
4. How does the device handle signal transmission and isolation between ports?
The isolator provides complete three-port isolation among input, output, and power circuitry, achieving a dielectric strength of 3000 V AC between intrinsically safe and non-intrinsically safe terminals.
5. What environmental conditions and temperature ranges are supported during operation?
The device is rated for reliable operation in ambient temperatures ranging from -20 ℃ to +60 ℃ and can be stored in temperatures between -40 ℃ and +80 ℃.
6. What are the physical dimensions and mounting specifications of the enclosure?
The housing features a slim profile with dimensions of 17.8 mm width, 110 mm height, and 117 mm depth, engineered for standard DIN 35 mm rail mounting.
7. What routine maintenance or troubleshooting steps are recommended for these barriers?
Routine maintenance involves checking screw terminal tightness, verifying wiring shield grounding, and monitoring the internal online self-diagnostic indicators for any fault conditions.
8. What input signal ranges and sensor types are compatible with this hardware?
The unit accepts linear resistance inputs from 18 to 400 Ω, such as those from potentiometers, with a maximum allowable lead wire resistance of ≤ 20 Ω per line.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a global industrial electrical automation service provider, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1) Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3) At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
+86 010-64225983
+8613811814778
Building 26, Liyuan Community, Chaoyang District, Beijing, China
