Fire Detection Cable System · Digital Type LHD Cable

Linear Heat Detection Cable

ZION Linear Heat Detection Cable is a digital fixed-temperature heat detection cable system for fire alarm and industrial safety applications. The complete solution includes LHD cable, control unit and end-of-line unit, with multiple alarm temperature options and cable types for standard, outdoor-resistant and explosion-proof project environments.

Request Datasheet / Sample Ask for Project BOM Support

Alarm temperatures: 68°C / 88°C / 105°C / 138°C / 180°C

Types: Conventional / CR/OD / EP

System: LHD Cable / Control Unit / EOL Unit

Control unit: 24VDC · IP66

Control unit for linear heat detection cable

End of line unit EOL box for linear heat detection cable

LHD Cable Control Unit EOL Unit

Overview

What is this product used for?

Answer-first Product Overview

ZION Digital Linear Heat Detection Cable is used to detect fixed-temperature fire or overheating conditions along cable routes, equipment zones, outdoor areas and industrial environments where point detectors may not cover the protected path effectively. It is suitable for fire alarm contractors, industrial safety engineers, system integrators and distributors who need LHD cable with control unit and end-of-line box support. The most important specifications are alarm temperature, cable type, ambient temperature, installation environment, control unit voltage and fire alarm panel interface. Before ordering, confirm the project temperature class, standard/outdoor/explosion-proof type, required cable length, control unit quantity, EOL box quantity and documentation needs.

Key Specification Bullets

Digital type linear heat detection cable system
System components: LHD cable, control unit and end-of-line unit
Fixed alarm temperature options: 68°C, 88°C, 105°C, 138°C and 180°C
Cable types: Conventional, CR/OD outdoor-resistant and EP explosion-proof type
Continuous sensitivity along the detection cable
Compatible with fire alarm systems through alarm and fault signal transfer
Control unit operating voltage: 24VDC
Control unit and EOL box IP rating: IP66
Available model series from ZC-D4068 to ZC-D4180

Product Type

Digital Linear Heat Detection Cable System

Construction

Two inter-twisted rigid metallic conductors with heat-sensitive layer, insulation bandage and outer jacket

Application

Fixed-temperature fire detection for cable routes, industrial zones, outdoor areas and harsh environments

Jacket / Material

Model variants depend on outer jacket material and project environment; EP type uses woven metal mesh protection

Customization

Alarm temperature, type selection, cable length, printing, label and packing requirements should be confirmed before order

Supply Support

Datasheet, sample request, model selection support and project BOM review can be discussed with ZION

System Components

LHD Cable / Control Unit / End of Line Unit

LHD Cable

Detection Cable

LHD Cable

Fixed-temperature linear heat detection cable with continuous sensitivity along the detection route.

68°C–180°C Conventional CR/OD EP

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Control Unit

Signal Interface

ZC-D401 Control Unit

Used for digital type LHD cable; easy installation and operation with simple output signal.

24VDC IP66 Alarm / Fault

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EOL Unit

ZC-D402 end of line unit EOL box for digital LHD cable system

Loop Termination

ZC-D402 EOL Box

End of Line box for digital type LHD cable with no electronics.

No electronics IP66 -45°C to +60°C

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Technical Data

Technical Specification Table

Parameter	Specification	Engineering Meaning	Buyer Check
Product Name	Digital Type Linear Heat Detection System	The product is a detection system, not only a passive cable	Confirm whether the project needs cable only or cable + control unit + EOL box
Detection Principle	Fixed-temperature detection; the detector acts as an intelligent switch	At the alarm temperature, the heat-sensitive layer triggers contact between conductors	Confirm required alarm temperature according to fire design
System Components	LHD Cable, Control Unit, End of Line Unit Box	Complete detection loop requires cable and terminal/control accessories	Confirm quantity of cable, control units and EOL boxes
Signal Transfer	Transfers alarm and fault signals to fire alarm control panels	Designed to work with fire alarm system input	Confirm control panel input type and wiring requirement
Alarm Temperature Options	68°C, 88°C, 105°C, 138°C, 180°C	Different temperature classes suit different protected zones	Do not choose by price only; confirm ambient and alarm design
Cable Type	Conventional, CR/OD, EP	Different type for general, outdoor/corrosive and harsh EMI/explosion-proof environments	Confirm installation environment before model selection
Sensitivity	Continuous sensitivity; not affected by environmental temperature change or detection cable length	Helps maintain detection behavior along the cable route	Confirm maximum route length and installation design separately
Ambient Temperature Max	45°C, 60°C, 75°C, 93°C, 121°C depending on series	Higher alarm temperature series can tolerate higher ambient temperature	Select alarm temperature higher than normal ambient condition
Ambient Temperature Min — CR/OD	-55°C	Suitable for colder outdoor-resistant applications	Confirm local minimum temperature
Ambient Temperature Min — Conventional / EP	-40°C	Standard lower limit for conventional and EP types	Confirm project site temperature
Storage Temperature	Up to 45°C / 70°C / 105°C depending on series	Storage conditions vary by temperature series	Confirm warehouse and transportation conditions
Alarm Deviation	±3°C for 68°C; ±5°C for 88°C / 105°C / 138°C; ±8°C for 180°C	Indicates alarm temperature tolerance	Check project tolerance requirement
Alarm Response Time	10s max for 68°C / 88°C; 15s max for 105°C; 20s max for 138°C / 180°C	Higher temperature series may have different response time	Confirm response requirement with project consultant
Control Unit Model	ZC-D401	Used for digital type LHD cable	Confirm control unit is included in project BOM
Control Unit Voltage	24VDC; allowed range 16VDC–28VDC	Power requirement for control unit	Confirm available power supply
Control Unit Current	Standby ≤20mA; Alarm ≤30mA; Fault ≤25mA	Helps fire alarm engineers check power load	Confirm panel and power supply capacity
Control Unit Environment	-45°C to +60°C, 95% relative humidity, IP66	Suitable for demanding installation conditions	Confirm installation location and enclosure requirements
EOL Box Model	ZC-D402	End-of-line box for digital type LHD cable	Confirm required EOL quantity by detection loop
EOL Box Voltage	No electronics	Passive terminal device	Confirm correct terminal connection
EOL Box Environment	-45°C to +60°C, 95% relative humidity, IP66	Matches control unit environmental rating	Confirm outdoor or exposed location requirements
Control Unit / EOL Dimensions	90mm × 85mm × 52mm	Useful for panel, wall or box installation planning	Confirm available mounting space

Model Series Reference

Alarm Temperature	Color	Standard Model	CR/OD Model	EP Model
68°C	Blue	ZC-D4068	ZC-D4068-P	ZC-D4068-E
88°C	Red	ZC-D4088	ZC-D4088-P	ZC-D4088-E
105°C	White	ZC-D4105	ZC-D4105-P	ZC-D4105-E
138°C	Yellow	ZC-D4138	ZC-D4138-P	ZC-D4138-E
180°C	Orange	ZC-D4180	ZC-D4180-P	ZC-D4180-E

Construction

Construction / Material Table

Linear heat detection cable structure diagram showing conductor insulation bandage and outer jacket

Component	Material / Design	Function	Selection Note
Conductors	Two inter-twisted rigid metallic conductors	Form the detection circuit and trigger alarm contact when the heat-sensitive layer changes state	Confirm project requires digital fixed-temperature LHD detection
Heat-sensitive Layer	NTC heat-sensitive material covering the conductors	Responds to fixed alarm temperature and enables alarm signal generation	Select correct alarm temperature series
Insulation Bandage	Insulative bandage layer	Provides insulation and structural separation	Confirm environmental and installation requirements
Outer Jacket	Model variants depend on outer jacket material	Protects the detection cable in different environments	Choose according to indoor, outdoor, chemical or high-temperature exposure
CR/OD Type Protection	UV-resistant and weather-resistant design	Suitable for outdoor installation and acid, alkali or salt spray environments	Use when outdoor or corrosive exposure is expected
EP Type Protection	Woven metal mesh outer protection	Supports anti-EMI performance and surface static elimination in harsh environments	Use only when EP-type project conditions are required and confirm project approval needs
Control Unit	ZC-D401 control unit	Provides simple output signal for digital type LHD cable	Confirm voltage, wiring and fire panel interface
End of Line Unit	ZC-D402 EOL box	Completes the detection circuit at the end of the cable line	Confirm EOL arrangement per detection loop

Application & Selection

Application Matrix

Application	Recommended Use	Key Requirement	Risk to Avoid	Buyer Note
Cable Tray / Cable Route Fire Detection	Install LHD cable along cable routes where overheating may occur	Continuous detection along the protected path	Do not replace detection cable with normal fire alarm cable	Confirm cable length, route layout and alarm temperature
Industrial Equipment Area	Use LHD cable near equipment zones with overheating risk	Correct fixed alarm temperature and protection type	Choosing too low or too high alarm temperature	Check normal operating temperature before ordering
Outdoor Fire Detection Route	Use CR/OD type when UV, weather or outdoor exposure is expected	UV and weather resistance	Using standard type in exposed outdoor conditions	Confirm outdoor exposure, sunlight and installation method
Corrosive Environment	Use CR/OD type for acid, alkali or salt spray resistance requirements	Environmental jacket protection	Ignoring chemical or coastal exposure	Confirm chemical environment before model selection
Harsh EMI Environment	Use EP type where anti-EMI protection is required	Woven metal mesh protection	Selecting standard type for severe EMI areas	Confirm EMI level and project specification
Explosion-proof Project Area	Consider EP type where project calls for explosion-proof type	Project safety design and local approval requirements	Assuming EP type automatically satisfies all local certification rules	Confirm project documentation and authority requirements before bulk order
Fire Alarm System Integration	Use LHD cable with ZC-D401 control unit and ZC-D402 EOL box	Proper alarm and fault signal connection	Buying cable only when system accessories are needed	Confirm panel input, 24VDC power and wiring diagram
Distributor Product Line	Offer complete LHD cable family by temperature and type	Clear model table and application explanation	Selling only by color without explaining temperature/type	Prepare model chart, sample set and datasheet for customers

Selection Guide

Project Condition	Recommended Direction	Why It Matters	What to Confirm
General indoor fire detection route	Conventional LHD cable	Most widely used type for stable general applications	Alarm temperature and route length
Outdoor installation	CR/OD type	Provides UV and weather resistance	Sunlight exposure, rain, temperature and fixing method
Acid, alkali or salt spray environment	CR/OD type	Designed for environments requiring chemical/corrosion resistance	Chemical exposure and project environment
Harsh EMI environment	EP type	Metal mesh supports anti-EMI performance	EMI source, grounding and installation requirements
Project requires explosion-proof type	EP type	Intended for explosive hazardous environments	Required documentation and local approval requirements
Normal ambient temperature is low to medium	68°C or 88°C series may be considered	Lower alarm temperature can detect earlier temperature rise	Normal operating temperature and false alarm risk
Higher ambient temperature zone	105°C, 138°C or 180°C series may be considered	Avoids alarm selection below normal operating condition	Maximum ambient temperature and expected alarm threshold
Fire alarm panel has 24VDC supply	ZC-D401 control unit can be planned	Control unit operates at 24VDC with 16VDC–28VDC allowed range	Power supply and panel interface
Buyer needs complete system	LHD cable + ZC-D401 control unit + ZC-D402 EOL box	Complete loop support reduces installation mismatch	BOM quantity, loop design and accessories
Distributor stock planning	Cover popular alarm temperatures and at least standard / outdoor types	Helps meet different project requirements	Local market demand and sample needs

Comparison With Alternatives

This Product	Alternative Product	Difference	When to Choose	Risk
Linear Heat Detection Cable	Normal Fire Alarm Cable	LHD cable detects heat; normal fire alarm cable only transmits signal	Choose LHD cable when the cable itself must detect overheating or fire	Do not substitute normal cable for detection cable
Digital LHD Cable	Point Heat Detector	LHD cable monitors along a route; point detector monitors one location	Choose LHD for long cable trays, routes or difficult-to-access zones	Point-only detection may miss overheating away from detector position
Fixed-temperature Digital LHD Cable	Analog / Addressable Heat Detection Cable	Digital type works as fixed-temperature alarm switch; analog systems may provide more detailed temperature/location functions depending on design	Choose digital LHD when fixed alarm temperature and simple output are sufficient	Do not use digital type where continuous temperature measurement or exact location reporting is required
CR/OD LHD Cable	Conventional LHD Cable	CR/OD type is UV/weather-resistant and suitable for outdoor/corrosive environments	Choose CR/OD for outdoor, acid, alkali or salt spray environments	Standard type may not fit exposed outdoor environments
EP LHD Cable	Conventional LHD Cable	EP type has woven metal mesh for anti-EMI performance and static elimination	Choose EP for harsh EMI or explosion-proof project requirements	Confirm project approval requirements; do not assume one model fits all hazardous area standards
LHD Cable System	Smoke Detector	Heat detection responds to temperature; smoke detector responds to smoke	Choose LHD where heat detection along a route is required	Smoke detection and heat detection should not be treated as interchangeable without system design confirmation

Procurement Support

Quality / Packing / Customization

Datasheet & Sample Review

Before bulk ordering, buyers should request the latest datasheet and confirm the exact model series, alarm temperature, cable type, control unit and EOL box requirement. For new projects or distributor evaluation, sample review is recommended. Samples should be selected by alarm temperature and type, not only by cable color.

Printing / Label / Packing

Printing, label and packing requirements should be confirmed before order, especially for distributor or project-based supply. Recommended buyer checks include product model, alarm temperature, color marking, carton label, reel label and project reference information.

OEM/ODM & Distributor Support

For distributor customers, ZION can support product selection discussion, datasheet preparation, model comparison and project BOM review. OEM/ODM requirements such as label format, packing style, product marking and document language should be discussed before quotation.

FAQ

Linear Heat Detection Cable FAQ

What is Linear Heat Detection Cable used for?

Linear Heat Detection Cable is used for fixed-temperature fire or overheating detection along cable routes, industrial equipment zones, outdoor areas and other locations where continuous line detection is required.

Is this product a normal fire alarm cable?

No. It is a detection cable system. A normal fire alarm cable transmits signals, while LHD cable detects heat along the cable route and generates an alarm signal when the selected temperature is reached.

What does the complete system include?

The digital type system includes LHD cable, control unit and end-of-line unit. Buyers should confirm whether the quotation needs cable only or a complete system set.

How do I select the right alarm temperature?

Select the alarm temperature according to the normal ambient temperature, protected equipment condition and fire design requirement. Available options include 68°C, 88°C, 105°C, 138°C and 180°C.

What is the difference between Conventional, CR/OD and EP type?

Conventional type is the widely used standard option. CR/OD type is designed for UV, weather, acid, alkali and salt spray resistance. EP type is designed for harsh EMI or explosive hazardous environments with woven metal mesh protection.

Can this product be used outdoors?

For outdoor installation, CR/OD type is recommended because it is designed for UV and weather resistance. Buyers should still confirm the installation environment, exposure level and required protection.

Can this product be used in explosive hazardous environments?

EP type is designed for harsh EMI or explosive hazardous environments. However, buyers should confirm local project requirements, required approvals and documentation before order.

Can I request samples before bulk order?

Yes, sample review is recommended for new projects, distributor evaluation or model confirmation. The sample request should specify alarm temperature, cable type and required accessories.

Is customization available?

Customization requirements such as cable length, printing, label, packing and distributor documentation should be confirmed with ZION before quotation and production arrangement.

What is the MOQ?

The PDF does not state MOQ. MOQ should be confirmed with ZION according to model, cable length, packing requirement and order type.

What affects lead time?

The PDF does not state lead time. Lead time may depend on model, cable type, required length, customization, packing and order quantity. Buyers should confirm during quotation.

Can ZION provide datasheets?

Yes. Buyers should request the latest datasheet for model selection, engineering review and project submission.

Can ZION provide certificate-related documents?

Certificate-related documents should be requested according to the exact model and project requirement. Do not assume certification availability before confirming with ZION.

What should be confirmed before bulk order?

Before bulk order, confirm alarm temperature, cable type, length, control unit quantity, EOL box quantity, fire alarm panel interface, printing/label/packing requirement and required documents.

Linear Heat Detection Cable Supplier | Digital LHD Cable System

Linear Heat Detection Cable

What is this product used for?

Answer-first Product Overview

Key Specification Bullets

LHD Cable / Control Unit / End of Line Unit

LHD Cable

ZC-D401 Control Unit

ZC-D402 EOL Box

Technical Specification Table

Model Series Reference

Construction / Material Table

Application Matrix

Selection Guide

Comparison With Alternatives

Quality / Packing / Customization

Datasheet & Sample Review

Printing / Label / Packing

OEM/ODM & Distributor Support

Linear Heat Detection Cable FAQ

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