ZA-NH-DJYP2VP2-22 Cable: Fire-Rated Signal Integrity for Process Automation

A control system is only as reliable as its weakest physical link. When a single cable fault can trigger an unplanned shutdown, the financial exposure extends far beyond the cost of the cable itself. It hits production targets, tight project schedules, and equipment safety. The ZA-NH-DJYP2VP2-22 cable is engineered specifically to eliminate that risk in fire-critical environments. It combines flame-retardant properties with superior electromagnetic shielding, ensuring that emergency shutdown signals and critical instrumentation data transmit without failure when it matters most.

Aluminum Foil + Braided Mesh Dual Shielding

A laminated aluminum-polyester tape is applied with 100% coverage, bound tightly to the core. A tinned copper braid sits directly over it with 85% minimum coverage density.
This dual-layer architecture creates a Faraday cage effect. It blocks high-frequency noise from variable frequency drives and nearby power cables. For your system, that means clean analog signals without drift. PLCs and DCS panels receive accurate telemetry during high load operations, preventing false alarms or erroneous valve actuation.

Halogen-Free, Low-Smoke Insulation Compound

The core insulation uses a cross-linked polyolefin compound. It contains zero halogens and emits no corrosive acid gas when exposed to direct flame.
Non-toxic transparency is what saves lives and equipment here. Smoke density is kept low enough that exit signs remain visible. Meanwhile, adjacent relays and printed circuit boards survive without secondary contamination from black, conductive soot. Electrical integrity holds long enough for controlled emergency shutdowns.

Fire Resistance Under Direct Flame (ZA-NH Classification)

The cable maintains circuit integrity for a rated duration under IEC 60331 test conditions. The flame temperature reaches 750°C to 800°C and the cable continues to transmit voltage.
There is no grace period for fire pumps to start or for HVAC dampers to close. This cable removes the risk of a blackout inside the emergency system loop. Operators retain the ability to monitor tank pressures and actuate remote isolation valves while the fire suppression system does its work.

Robust Mechanical Barrier

A galvanized steel wire armor layer sits beneath the outer sheath, helically wound to provide a rigid, crush-resistant cylinder.
Cable trays in industrial plants are chaotic spaces. Installation crews pull massive medium-voltage lines across low-voltage instrument lines. This armor prevents the concentricity of the core from deforming under that compression load. Impedance stays uniform. No intermittent shorts. Your commissioning team avoids the nightmare of searching for an invisible crush point buried under twenty other cables.

Technical Specifications & Dimensions

Industry Applications & Scenario Validation

• Chemical Processing Plants
  Fire in a solvent storage area demands that emergency shutdown (ESD) valves close in a strict sequence. The dual shielding rejects interference from large compressor motors nearby, preserving the 4-20mA signal integrity to the DCS during the depressurization logic execution.

• Tunnel Ventilation & Metro Systems
  Smoke extraction fans must run for two hours at full load during a tunnel emergency. The low-smoke composition prevents toxic fumes from blinding emergency responders, while the fire-resistant core keeps the fan starter contactors energized.

• Oil & Gas Offshore Platforms
  Corrosive marine air and spray demand tinned copper conductors. The steel wire armor provides a mechanical shield against the vibration and incidental impact common on drilling decks, preventing the signal loss that leads to false blow-out preventer alarms.

• Nuclear & Thermal Power Stations
  Cable trays run through zones with extreme electromagnetic stress from generator bus ducts. The 85% copper braid shunts induced currents to ground, preventing potential differences that otherwise appear as noise on the thermocouple extension leads to the safety panel.

• High-Rise Commercial Buildings
  In high-rise smoke control systems, pressurized stairwell fans need power feedback signals confirmed. The halogen-free jacket ensures building-wide evacuation isn’t compromised by obscuring smoke or corrosive acids attacking the fire alarm panel electronics in the main control room.

International Compliance & QA Standards

• ✅ IEC 60331 – Test for electrical circuit integrity under fire conditions
• ✅ IEC 60332-3 Cat. A – Flame retardance test on a bunch of cables in vertical tray
• ✅ IEC 61034 – Measurement of smoke density of cables burning under defined conditions
• ✅ IEC 60754 – Test on gases evolved during combustion of materials from cables (Halogen-free)
• ✅ RoHS Directive 2011/65/EU – Restriction of hazardous substances compliance
• ✅ ISO 9001 – Quality management system certification across the manufacturing chain

FAQ

Q: Can you provide third-party test reports for the 750°C flame integrity rating?
A: Yes. Standard documentation includes type test certificates from accredited labs covering IEC 60331 circuit integrity. We supply these alongside the mill test certificate for the copper. If the project’s field acceptance test requires specific witness testing or 100% routine fire testing before shipment, specify this during the request for quotation stage. Setup time and sampling are planned accordingly.

Q: We are replacing an older PVC SWA instrument cable. Are the terminations different because of the halogen-free jacket?
A: The stripping behavior differs. The halogen-free polyolefin compound has a tighter molecular structure and higher heat deformation resistance than PVC. Installers need to use rotary stripping tools with calibrated depth settings, not a hook knife. The drain wires for the individual and overall screens must be separated cleanly to avoid ground loops. The steel wire armor terminates in standard brass cable glands suitable for steel braid. No specialty cleats required.

Q: A competitor offers a silicone-insulated fire cable. Why specify cross-linked polyolefin?
A: Silicone offers good fire performance but poor mechanical tear resistance. During cable pulling through conduit bends at 12 times overall diameter, silicone jackets are more likely to tear back against metal edges. The polyolefin compound used here resists abrasion better during installation without compromising the low smoke toxin output. This reduces the risk of a damaged jacket that exposes the shield to moisture during the building’s service life.

Get a Project-Specific Datasheet

Cable sizing for fire alarm and ESD loops depends on voltage drop over distance, not just ampacity. Send us your loop schematic distance and the required circuit integrity time in minutes. We return a voltage drop calculation and the confirmed outer diameter for your tray fill schedule.

Request your cutoff-to-length quote and lead time today.