1 / 5

Product

PROFIBUS DP / PA & Process Fieldbus cablesIEC 61158-2 / ISA SP50.02100 Ω @ 31.25 kHz · 18/16 AWG1P Spur/Trunk & 2P–12P Homerun

FOUNDATION Fieldbus H1 CableIEC 61158-2 / ISA SP50.02 Type A 100 Ω (31.25 kHz) 1P to 12P×18 AWG FOUNDATION Fieldbus

FOUNDATION Fieldbus H1 Cable is the IEC 61158-2 Type A and ISA SP50.02 process fieldbus cable (100 Ω ± 20 Ω at 31.25 kHz, ≤ 44 Ω/km loop resistance on 18 AWG / 0.8 mm², ≤ 3.0 dB/km at 39 kHz), supplied in 1-pair spur/trunk cables and 2- to 12-pair

Low-EMC design
EMC screen
Oil-resistant
Flame-retardant
Order designation
FF H1 Type A 1×2×16 AWG Heavy Trunk Orange
Outer Ø ≈
8.6 mm
Copper weight
44 kg/km
Total weight ≈
94 kg/km
Min. bend R (fixed)
69 mm
All sizes (5)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Impedance Z0
100 Ω ± 20 Ω
At 31.25 kHz Manchester MBP
Pair counts
1P to 12P × 18
Single-pair & multi-pair homerun
Loop resistance
≤ 44 Ω / km
18 AWG (0.8 mm²) · ≤ 28 Ω/km (16 AWG)
Attenuation
≤ 3.0 dB / km
At 39 kHz (≤ 0.30 dB/100m)
Max. segment
1,900 m
Non-Ex 1900 m · FISCO Ex-ia 1000 m
Sheath & armour
PVC / LSZH / SWA
Orange (Non-Ex), Blue (Ex-i), SWA

Typical values for this cable type, based on IEC 61158-2 Type A / ISA SP50.02 (FOUNDATION Fieldbus H1) — confirmed in the datasheet and quotation for your order.

Application fit

Is FOUNDATION Fieldbus H1 right for your machine?

Engineered for distributed control system (DCS) H1 fieldbus segments and multi-pair marshalling homeruns in oil & gas refineries, LNG terminals, chemical plants, and offshore platforms.

Fixed installation

Suitable

Single-pair spurs and multi-pair (2P to 12P) homerun trunk cables for refinery cable trays and pipe racks.

Immersion & wet locations

Suitable

Galvanized steel wire armoured (SWA) and lead-free hydrocarbon-resistant outer jackets for buried and offshore service.

Switchgear & control cabinet wiring

Suitable

Numbered individual pair foils (PiMF) on multi-pair trunks terminate cleanly into DCS H1 marshalling cabinets.

Energy chain / drag chain

Not suitable

Fixed process instrumentation cable; not intended for continuous linear drag chains.

PROFINET Type C
Typical machinesOil & gas refineries & petrochemicalLNG terminals & offshore topsidesPower generation & boiler controlsChemical & pulp-and-paper DCS

Construction

Layer by layer

Stranded tinned copper conductors (18 AWG / 0.8 mm² or 16 AWG / 1.3 mm², Blue `-` and Orange `+`) with low-loss PE/PP insulation, Al/PET

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Stranded tinned copper conductors18 AWG (7×0.40 mm, 0.88 mm²) or 16 AWG (7×0.49 mm, 1.31 mm²) tinned copperIEC 61158-2 / ISA SP50.02
2Polyolefin / PE dielectricLow-capacitance polyethylene or foam-skin PE tuned to Z0 = 100 Ω @ 31.25 kHzIEC 61158-2 Type A
3Pair & collective Al/PET screen100 % coverage Al/PET tape with 20 AWG tinned copper drain wire (PiMF + overall screenISA SP50.02 Type A
4Optional tinned Cu braid or SWA armourTinned copper braid (≥80 %) or galvanized steel wire armour (SWA) for mechanicalEN 50288-7 / BS 5308
5Outer sheathFlame-retardant PVC, LSZH (SHF1), or PUR in RAL 2003 Orange, Yellow, or RAL 5015 Ex-i BlueUL 13 PLTC / IEC 60332-3-24

FF H1 Single-Pair Spur/Trunk (1×2×18 AWG & 16 AWG)

Standard Orange, Yellow, or Ex-i Blue single-pair Type A cable (unarmoured or SWA armoured).

FF H1 Multi-Pair Homerun (2P, 4P, 8P, 12P × 18 AWG)

Individually and overall screened (IS/OS) multi-pair trunk cable connecting field junction boxes to DCS

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on IEC 61158-2 Type A / ISA SP50.02 (FOUNDATION Fieldbus H1). Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance Z0
100 Ω ± 20 Ω at 31.25 kHz
Max. DC loop resistance @ 20 °C
≤ 44 Ω/km (18 AWG) · ≤ 28 Ω/km (16 AWG)
Mutual capacitance @ 1 kHz
≈ 48 pF/m (standard limit ≤ 60 nF/km)
Attenuation @ 39 kHz
≤ 3.0 dB/km (≤ 0.30 dB/100m)
Max. propagation delay
≤ 1.7 µs/km (VoP ≈ 66–68 %)
Operating / test voltage
300 V (UL PLTC / ITC) · 1.5 kV AC

Thermal

Operating temp. (fixed)
-40 °C to +105 °C (105 °C PLTC PVC) · -40
Installation temperature
-20 °C to +60 °C

Mechanical

Min. bending radius
8 × D unarmoured · 12 × D SWA armoured
Crush & impact resistance
UL 13 PLTC / EN 50288-7 industrial tray

Resistance

Sunlight, oil & chemical resistance
UL Sunlight Resistant · Oil Res I/II · EN
Flame retardancy
IEC 60332-3-24 Cat C / UL 1685 FT4 Vertical

Reference standards

Primary specification
IEC 61158-2 Type A · ISA SP50.02 ·
Hazardous location ratings
NEC Class I Div 2 (PLTC-ER) · ATEX/IECEx

Identification

Core polarity colours
Orange (+) & Blue (-) — numbered pairs on
Outer sheath colour
Orange (standard Non-Ex), Yellow, or Blue

Sizes

5 standard configurations (FOUNDATION Fieldbus H1)

Nominal dimensions, copper weights, impedance and transmission parameters for FOUNDATION Fieldbus H1 per IEC 61158-2 Type A / ISA SP50.02 (FOUNDATION Fieldbus

Dimensions & weights
Order designationConfigurationConductor sizeOuter Ø ≈
mm		Copper
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard FOUNDATION Fieldbus H1 configurations
FF H1 Type A 1×2×18 AWG Unarmoured Orange1×2×18 AWG (Single-Pair Trunk)18 AWG (0.88 mm²)7.6327261
FF H1 Type A 1×2×16 AWG Heavy Trunk Orange1×2×16 AWG (Long-Reach Trunk)16 AWG (1.31 mm²)8.6449469
FF H1 Type A 1×2×18 AWG SWA Armoured1×2×18 AWG (SWA Armoured)18 AWG (0.88 mm²)12.23224098
FF H1 Multi-Pair Homerun 4×2×18 AWG IS/OS4×2×18 AWG (4-Pair Homerun)18 AWG (0.88 mm²)14.8118235118
FF H1 Multi-Pair Homerun 8×2×18 AWG IS/OS8×2×18 AWG (8-Pair Homerun)18 AWG (0.88 mm²)19.5232410156
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal factory values subject to ±5 % manufacturing tolerance per IEC 61158-2 Type A / ISA SP50.02 (FOUNDATION Fieldbus H1).

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
31.25 kHz impedance Z0 & 39 kHz attenuationZ0 = 100 ± 20 Ω; attenuation ≤ 3.0 dB/km100 % of reels
DC loop resistance, capacitance & 1.5 kV AC≤ 44 Ω/km (18 AWG); ≤ 60 nF/km; 1.5 kV AC dielectric100 % of reels
Sample tests
Pair-to-pair crosstalk (Multi-pair IS/OS homerun)≥ 60 dB at 39 kHz between individually shielded pairsPer production batch
IEC 60332-3-24 Cat C / UL 1685 FT4 tray flameVertical tray flame propagation passType approval

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

IEC 61158-2 / ISA SP50.02FieldComm Group FF-844UL 13 PLTC / ITC FT4

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX FOUNDATION FIELDBUS H1 TYPE A
Delivery form
Non-returnable plywood reels or export drums
Standard reel lengths
100 m · 305 m · 500 m · 1000 m
MOQ
100 m (stock variants) · 500 m (custom)
Lead time
2–3 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFFOUNDATION Fieldbus H1 Cable – technical datasheet5 sizes · construction, technical data, approvalsXLSXFOUNDATION Fieldbus H1 spec data (Excel)All 5 sizes with dimensions and data, for your BOM or quotation
Revision
2026-10-20
Updated
2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What is the difference between a single-pair H1 spur/trunk cable and a multi-pair H1 homerun cable?
Single-pair (1×2×18 AWG) H1 cable connects field transmitters to field junction boxes (megablocks) or forms single trunks. Multi-pair homerun cables (2, 4, 8, or 12 individually foil-shielded 18 AWG pairs inside one overall screen and sheath) consolidate multiple H1 segments from field junction boxes back to the DCS marshalling room.
When should I choose 16 AWG over 18 AWG for FOUNDATION Fieldbus H1?
Standard 18 AWG (0.88 mm², ≤ 44 Ω/km loop resistance) satisfies the vast majority of 1,900 m H1 segments. When a trunk feeds 12–16 high-current field valves/transmitters over distances exceeding 1,200 m, stepping up to 16 AWG (1.31 mm², ≤ 28 Ω/km) reduces DC voltage drop and preserves minimum 9 V terminal voltage.
Why are FOUNDATION Fieldbus H1 cores coloured Orange and Blue?
Per ISA SP50.02 and FieldComm Group wiring conventions, Orange identifies the positive fieldbus conductor (FF+) and Blue identifies the negative conductor (FF-), ensuring consistent polarity across power conditioners, segment protectors, and transmitters. Each production reel undergoes 100 % characteristic impedance verification, mutual capacitance and DC loop resistance testing, and dielectric spark/withstand inspection before dispatch with an EN 10204 3.1 certificate.
Does FOUNDATION Fieldbus H1 cable support FISCO and FNICO hazardous areas?
Yes. Both the 18 AWG and 16 AWG constructions meet all IEC 60079-27 / IEC 60079-11 Annex G distributed R', L', and C' parameters for FISCO (Zone 0/1 Ex ia/ib) and FNICO (Zone 2 / Division 2 non-incendive) fieldbus architectures. Each production reel undergoes 100 % characteristic impedance verification, mutual capacitance and DC loop resistance testing, and dielectric spark/withstand inspection before dispatch with an EN 10204 3.1 certificate.

Request a quote

Get an engineering quote for FOUNDATION Fieldbus H1

Your selection and application details are copied into the enquiry form below.

01Selected sizes

Use + Add next to a size or configuration.

02Reel & motion

Add your operating conditions here to include them in your enquiry.

03Message for our engineers

FOUNDATION Fieldbus H1 Cable

Selected sizes:


Reel & motion:
- Reel type: 
- Drum core diameter (mm): 
- Cable length on drum (m): 
- Travel speed (m/min): 
- Max. acceleration: 
- Cycles per hour: 
- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
- Equipment and operating conditions:
Send via WhatsApp

100 Ω 31.25 kHz process bus

PROFIBUS PA

IEC 61158-2 Type A 100 Ω 1×2×18 AWG Ex-i & non-Ex process fieldbus cable

View product150 Ω RS-485 fieldbus

PROFIBUS DP

IEC 61158-2 150 Ω 1×2×0.64 mm FastConnect violet PROFIBUS DP cable

View product10BASE-T1L / 1000BASE-T1

SPE

IEC 61156-11/12/13 100 Ω 1×2 S/FTP Single Pair Ethernet + PoDL cable

View product120 Ω low-cap EIA-485

RS-422 / RS-485

TIA/EIA-422/485 120 Ω low-capacitance SF/UTP multi-pair serial data cable

View product
DatasheetRequest a quote