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Product

industrial data rf cable seriesEN 50254 / IEC 61158 INTERBUS3×2×0.25 mm² (100 Ω) + 3×1.0 mm²FD P Drag-Chain PUR · RAL 4001

INTERBUS FD P Combi Continuous-Flex PUR Hybrid Data & Power Drag-Chain CableEN 50254 INTERBUS 100 Ω 3×2×0.25 mm² data + 3×1.0 mm² power continuous-flex PUR cable

Continuous-flex drag-chain INTERBUS Remote Bus hybrid cable (UNITRONIC BUS IBS FD P COMBI A) per IEC 61158-2 with 3×2×0.25 mm² 100 Ω RS-485 data pairs plus 3×1.0 mm² 24 V DC power cores, ≥ 85 % tinned braid, and UL AWM 20236 halogen-free PUR sheath.

Low-EMC design
EMC screen
Oil-resistant
Flame-retardant
Order designation
IBS FD P COMBI A
Outer Ø ≈
9.10 mm
Wall thickness
1.00 mm
Total weight ≈
116.0 kg/km
Min. bend R (fixed)
73 mm
All sizes (8)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Impedance
100 Ω ± 15 Ω
At 1 MHz to 20 MHz RS-485 bus
Hybrid build
3×2×0.25+3×1.0
3 data pairs + 3 power cores
Mutual cap.
< 60 nF/km
At 800 Hz · 66 % VoP PE data
Outer sheath
Violet PUR
RAL 4001 halogen-free TMPU
Drag-chain
≥ 5M cycles
Continuous-flex FD P stranding
Outer diameter
9.1 mm nominal
Min bend R 75 mm fixed / 90 flex

Typical values for this cable type, based on EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid) — confirmed in the datasheet and quotation for your order.

Application fit

Is INTERBUS FD P Combi right for your machine?

Specify UNITRONIC BUS IBS FD P COMBI A for continuous-flex drag chains, automotive body-shop welding gantries, palletizers, and remote I/O stations using the Phoenix Contact INTERBUS remote or installation bus.

Energy chain / drag chain

Suitable

Extra-fine 32-wire (0.25 mm²) and 56-wire (1.0 mm²) cores plus PUR jacket deliver ≥ 5 million drag-chain cycles.

VFD inverter to AC motor screened feeder

Suitable

≥ 85 % tinned copper braid screen isolates 500 kbps / 2 Mbps full-duplex INTERBUS frames from welding and servo EMI.

Switchgear & control cabinet wiring

Suitable

Combines DO/DI forward/return data pairs, ground reference pair, and 24 V DC / PE power (3×1.0 mm²) inside a single Ø 9.1 mm violet cable.

Motorised monospiral reel

With conditions

Designed for horizontal/vertical machine drag chains; for long-travel crane reels, use aramid-reinforced reeling cables.

Use ETHERLINE ROBUST FR
Typical machinesAutomotive Body-in-White & Welding LinesMachine Tools & Transfer GantriesAutomated High-Bay WarehousesWoodworking & Packaging MachineryPhoenix Contact INTERBUS Remote I/O

Construction

Layer by layer

INTERBUS FD P COMBI build: 3×2×0.25 mm² PE data pairs (WH/BN, GN/YE, GY/PK) + 3×1.0 mm² power cores (RD, BU, GNYE), fleece wrap, ≥ 85 % tinned copper braid, and violet RAL 4001 PUR sheath.

12345
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Superfine stranded bare copper data & power coresData: 3×2×0.25 mm² (32×0.10 mm); Power: 3×1.0 mm² (56×0.15 mm) bare copper per IEC 60228 Class 6Prevents strand work-hardening during multi-million-cycle drag-chain travel
2Low-capacitance PE (data) & polyolefin (power) insulationData pairs in DIN 47100 PE (white/brown, green/yellow, grey/pink); Power cores (red 24V, blue 0V, green/yellow PE)Holds data mutual capacitance < 60 nF/km and 100 Ω ± 15 Ω impedance
3Core fillers & non-woven sliding fleece wrapLow-friction central/interstitial fillers + non-woven separating fleece over the hybrid bundleAllows stress-free relative core movement on tight drag-chain radii
4Overall tinned copper wire braid screenFine-wire tinned copper braid (≥ 85 % optical coverage)EMC compliance across 500 kbps and 2 Mbps INTERBUS ring topologies
5Halogen-free polyurethane (TMPU) outer sheathFlame-retardant, oil- and coolant-resistant polyether PUR (Violet RAL 4001, Ø 9.1 mm)Resists mineral oils, cutting emulsions, weld spatter, and abrasion

IBS FD P COMBI A (3×2×0.25 + 3×1.0 mm² · Ø 9.1 mm)

Continuous-flex PUR drag-chain hybrid cable for INTERBUS remote bus + 24 V DC module supply

IBS FD P (3×2×0.25 mm² · Ø 7.3 mm Data-Only)

Continuous-flex PUR drag-chain INTERBUS data-only remote bus cable without power cores

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid). Values for your order are confirmed in the datasheet and quotation.

Electrical

Characteristic impedance (data)
100 Ω ± 15 Ω (at 1 MHz to 20 MHz)
Conductor DC resistance @ 20 °C
≤ 79.9 Ω/km (0.25 mm² data) · ≤ 19.5 Ω/km (1.0 mm² power)
Mutual capacitance (data pairs)
< 60 nF/km (60 pF/m) at 800 Hz · 66 % VoP
Attenuation @ 1.0 / 4.0 / 16 MHz
1.5 / 2.7 / 5.2 dB/100m (0.25 mm² pairs)
Peak working & test voltage
250 V (data/power) · 1,500 V AC rms test voltage

Thermal

Operating temp. (fixed)
-40 °C to +80 °C
Operating temp. (drag-chain)
-30 °C to +70 °C (+80 °C UL AWM)
Current rating (1.0 mm² power)
Up to 12 A continuous at +30 °C ambient

Mechanical

Core configuration
3 × 2 × 0.25 mm² (AWG 24) + 3 × 1.0 mm² (AWG 18)
Overall cable diameter
9.1 mm ± 0.3 mm (116 kg/km total weight)
Min. bending radius
8 × OD (73 mm fixed) · 10–12 × OD (91–109 mm chain)
Drag-chain endurance
≥ 5,000,000 cycles at 5 m/s², 10 m travel

Resistance

Oil & coolant resistance
EN 60811-404 / UL Oil Res I & II
Flame & halogen-free
IEC 60332-1-2, UL FT1/VW-1 & IEC 60754-1/2
Hydrolysis & UV resistance
Polyether-PUR resists microbes, hydrolysis & UV

Reference standards

Fieldbus certification
EN 50254 / IEC 61158 Type 8 INTERBUS Club
UL / CSA approvals
UL AWM Style 20236 / 21198 (80 °C, 300 V)
RoHS, REACH & LABS
RoHS 3, REACH & LABS/PWIS-free for paint shops

Identification

Core identification
Data: WH/BN, GN/YE, GY/PK · Power: RD, BU, GNYE
Outer sheath colour
Violet (RAL 4001) standard fieldbus colour
Customs tariff (HS)
8544.49

Sizes

8 standard configurations (UNITRONIC BUS IBS FD P COMBI A)

Engineering dimensions, impedance, propagation velocity, and electrical ratings for UNITRONIC BUS IBS FD P COMBI A per EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid).

Dimensions & weights
Order designationImpedance / sizeConductor & dielectricWall ≈
mm		Outer Ø ≈
mm		Metal
kg/km		Weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
Standard UNITRONIC BUS IBS FD P COMBI A configurations
IBS FD P COMBI A3×2×0.25 + 3×1.0 mm²Class 6 Cu + PE + PUR Chain1.009.1065.0116.073
UNITRONIC BUS IBS FD P3×2×0.25 mm² (Data Only)Class 6 Cu + PE + PUR Chain0.907.3033.068.058
UNITRONIC BUS IBS COMBI3×2×0.25 + 3×1.0 mm² PVCFixed Installation PVC1.009.0065.0122.072
UNITRONIC BUS IBS (Fixed)3×2×0.25 mm² PVCFixed Remote Bus PVC0.907.2033.071.058
IBS FD P COMBI 1.53×2×0.25 + 3×1.5 mm²Heavy 24V Power Hybrid PUR1.109.8080.0142.078
IBS ROBOT COMBI Torsion3×2×0.25 + 3×1.0 mm²±180°/m Welding Robot PUR1.059.3066.0120.075
IBS H COMBI Halogen-Free3×2×0.25 + 3×1.0 mm² LSZHFixed Halogen-Free LSZH1.009.1065.0125.073
IBS YV COMBI Direct Burial3×2×0.25 + 3×1.0 mm² PEReinforced Black Outdoor1.4010.6065.0148.085
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Outer diameters and weights are nominal engineering values for UNITRONIC BUS IBS FD P COMBI A subject to standard manufacturing tolerances per EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid).

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
Characteristic impedance, return loss (VSWR) & TDR sweep100 % frequency-domain return loss and TDR impedance verification per EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid)Every manufactured length
Dielectric spark & high-voltage withstand test100 % in-line spark and AC/DC dielectric withstand per EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid)Every spool or drum length
Sample tests
Insertion loss (attenuation), velocity & capacitance checkAttenuation (dB/100m), VoP (%), and capacitance within EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid) limitsPer production batch
Screening attenuation, transfer impedance & environmental qualificationQualified to EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid) EMC shielding, thermal, and flame/fluid criteriaType qualification

Inspection certificate

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

Product approvals

EN 50254 / IEC 61158 Type 8 INTERBUS (3×2×0.25 + 3×1.0 mm² Drag-Chain Hybrid)CE (2014/35/EU) & RoHS 3 (2015/863/EU) CompliantREACH SVHC Compliance Verified

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX UNITRONIC BUS IBS FD P COMBI A 3x2x0.25+3x1.0 PUR UL AWM
Delivery form
Export wooden drums, flange reels or precision coils
Standard lengths
100 m · 305 m · 500 m · 1000 m (or custom cut lengths)
MOQ
100 m (stock sizes) · 300–500 m (custom build)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFINTERBUS FD P Combi Continuous-Flex PUR Hybrid Data & Power Drag-Chain Cable – technical datasheet8 sizes · construction, technical data, approvalsXLSXINTERBUS FD P Combi spec data (Excel)All 8 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.

Why does an INTERBUS remote bus cable require three twisted data pairs (3×2×0.25 mm²) instead of a single RS-485 pair?
Unlike linear-drop fieldbuses, INTERBUS operates as an active hardware shift-register ring through every node in a single cable: Pair 1 (White/Brown) carries the outgoing forward data (DO1/DO2), Pair 2 (Green/Yellow) carries the returning loopback data (DI1/DI2) from the downstream node, and Pair 3 (Grey/Pink) provides logic ground reference and cable-presence handshaking.
What is the role of the three 1.0 mm² cores in IBS FD P COMBI A?
In INTERBUS remote/installation bus islands ('COMBI'), the 3×1.0 mm² cores (Red = +24 V DC U_S/U_I, Blue = 0 V GND, Green/Yellow = Protective Earth) power the remote bus terminal logic and local sensors over the same drag-chain cable.
What do 'FD' and 'P' designate in UNITRONIC BUS IBS FD P COMBI A?
'FD' (Flexible Design / power chain) denotes extra-fine Class 6 copper stranding and low-friction fleece construction for continuous drag-chain flexing (≥ 5 million cycles), while 'P' denotes a halogen-free, oil- and notch-resistant polyurethane (TMPU) outer sheath.
Is IBS FD P COMBI A suitable for automotive body-in-white and paint shops?
Yes. It is manufactured free from paint-wetting impairment substances (LABS / PWIS / silicone-free) and its PUR jacket resists welding spatter and machining oils.

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01Selected sizes

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02Reel & motion

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03Message for our engineers

BUS IBS FD P COMBI INTERBUS Continuous-Flex PUR Hybrid Remote Bus Data and Power Drag-Chain 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:
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