ZA-NH-DJYP2VP2 Cable: Signal Integrity for High-Stakes Industrial Networks

A single corrupted signal in a process control loop can cascade into unplanned downtime. In petrochemical refining or thermal power generation, this often translates to six-figure hourly losses. The ZA-NH-DJYP2VP2 cable is engineered to eliminate that variable. It combines dual-layer shielding with fire-resistant insulation, delivering verifiable data transmission stability in environments where heat, moisture, and electromagnetic interference coexist.

Dual-Layer Shielding: How It Blocks False Signals

The construction uses an aluminum/polyester tape wrapped around each twisted pair, plus an overall copper wire braid.

Individual pair shielding prevents crosstalk between signal channels within the same cable bundle. The overall braid rejects external EMI from nearby drives, switchgear, or high-voltage lines. For the procurement manager, this means one cable replaces multiple segregated runs. Tray fill drops. Installation hours shrink. And the SCADA data your team relies on remains clean—no ghost alarms triggered by interference, no actuators moving without command.

Fire Resistance That Buys Operational Minutes

Mica tape wraps each conductor directly under the insulation layer. The cable maintains circuit integrity at 750°C for 90 minutes.

Not all “fire-rated” cables perform the same under load. This one is tested to keep signal transmission alive during the critical window when emergency shutdown systems and sprinkler pumps must activate. In a refinery fire, those 90 minutes are the difference between controlled isolation and catastrophic equipment loss. Specifying this cable also closes a compliance gap: it satisfies the fire survival requirements in NFPA 70 and IEC 60331 without requiring external fire barriers.

Moisture Defense Without Conduit Dependency

The polyethylene inner sheath under the armor creates a vapor-tight seal. The outer PVC sheath adds UV stabilization.

Buried ducts draw water. Condensation cycles inside outdoor junction boxes. Standard instrumentation cables absorb moisture over time, changing capacitance values and skewing analog 4–20 mA signals. This cable’s dual-sheath design postpones that failure mode by years, not months. For field engineers maintaining remote wellheads or wastewater treatment sensors, this directly reduces midnight calibration calls and truck rolls to replace “drifted” cable segments.

Low Smoke, Zero Halogen: Human Safety as a Procurement Metric

All jacketing and insulation compounds are halogen-free. Smoke density during combustion stays below the threshold defined in IEC 61034.

When cable burns, the immediate threat to personnel isn’t flame. It’s smoke toxicity and visibility loss inside stairwells. Specifying low-smoke zero-halogen (LSZH) materials shifts liability exposure. Tunnel projects, underground rail, and hospital basements now mandate this in tender documents. This cable meets those specs out of the box. No material substitution waivers required. No post-installation coating treatments to manage.

Technical Specifications

Industry Applications

• Chemical and Petrochemical Processing: Continuous EMI shielding protects DCS and PLC analog inputs from variable frequency drives running pumps and compressors inside the same cable tray system.
• Thermal and Nuclear Power Generation: Circuit integrity under fire conditions supports safe turbine shutdown and lube oil pump operation, reducing asset damage during emergencies.
• Water and Wastewater SCADA Networks: Moisture-resistant inner sheath extends the functional life of cables running from motor control centers to remote flow meters in buried conduits.
• Tunnels and Underground Metro Systems: LSZH jacket eliminates corrosive halogen gas release, a non-negotiable requirement for ventilated evacuation routes and equipment rooms.
• Offshore Platforms and FPSO Vessels: Combined fire resistance and oil-resistant outer sheath options eliminate the weight and space penalty of redundant instrumentation cable runs.
• Iron and Steel Mills: Shielded pair construction maintains usable signal levels despite proximity to arc furnaces, overhead cranes with sliding contacts, and high-current rectifiers.

International Compliance & QA Standards

• ✅ IEC 60331-21 – Circuit integrity under fire at 750°C for 90 minutes
• ✅ IEC 60332-3 – Flame retardance on bunched cables (Category A)
• ✅ IEC 61034 – Smoke density measurement (LSZH compliance)
• ✅ IEC 60754-1/-2 – Halogen gas acidity and content from burning
• ✅ IEC 60228 – Conductors of insulated cables (Class 1 and 2)
• ✅ EN 50288-7 – Multi-element metallic cables for analogue and digital communication
• ✅ CE Marking – European Union conformity
• ✅ RoHS 2 (2011/65/EU) – Restriction of hazardous substances
• ✅ ISO 9001:2015 – Quality management system, full batch traceability

Every shipment includes a certified test report covering continuity, insulation resistance, dielectric strength, and shield resistance. Third-party witness testing (SGS, Bureau Veritas, TÜV) is available if your project specification requires it.

FAQ

Q: We need this cable for a project requiring 180-minute fire survival, not 90. Can you adjust the mica tape thickness to meet that?

Yes. The standard design uses a specific mica tape overlap and thickness to achieve 90-minute circuit integrity. We can reconfigure the conductor wrapping process for a 120-minute or 180-minute rating. The outer diameter will increase slightly. We typically provide a dimensional drawing before production so your tray fill calculations stay accurate. Testing certificates for the extended duration will accompany the delivery.

Q: Does the overall copper braid provide enough shielding when installed near medium-voltage 11kV cables in the same trench?

It does, with a condition. At 11kV levels, the separation distance matters more than additional shielding layers. We recommend maintaining 300 mm of physical separation as a standard practice. If your trench geometry forces closer parallel runs, we can increase braid coverage from 80% to 95% and switch to a double aluminum/polyester tape under the sheath. Both options preserve clean signal waveforms on RS-485 and 4–20 mA circuits. Ask for a shielding effectiveness curve when you submit the RFQ.

Q: Our site is in Southeast Asia with constant 90% humidity. How do you prevent insulation resistance degradation over 10 years?

Moisture ingress in tropical installations usually starts at the cable gland, not mid-span. The PE inner sheath on this cable is the primary defense—it bonds to the outer sheath under heat during extrusion, creating a single monolithic barrier. To address endemic humidity specifically, we also recommend specifying the optional bitumen-filled interstices between the pairs. This stops moisture migration along the cable core if the outer jacket ever sees accidental damage. Combined with correctly installed IP68 glands, routine IR testing at 500V DC will hold above 100 MΩ/km well beyond a decade.

Get a Specification Data Sheet for Your Project

Cable selection decisions carry cost consequences for years. We send complete raw material certificates, production checklists, and test reports—before you commit. If your project has specific pulling tension limits, bend radius constraints, or requires non-standard conductor colors, tell us in the RFQ.

Request the ZA-NH-DJYP2VP2 full data sheet and current lead time. Use the inquiry form on this page or write directly to our engineering support team with your installation parameters.