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120 Ohm Fire Resistant RS485 Databus Cable, Screened, LSZH
Fire resistant 120 ohm RS485 databus cable with a mica glass tape barrier and LSZH sheath. Four screening constructions and 1, 2 or 4 pair versions are listed for industrial data connections.
Fire Resistant RS 485 Databus Cables.pdf Contact us
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APPLICATION

For RS485 data circuits specifying a fire resistant cable construction. Mica glass tape forms an overall fire barrier around the cabled assembly, while an LSZH sheath encloses the selected screening arrangement. Four construction families support different pair counts and signal termination layouts.

STANDARDS

Basic design adapted to EIA/TIA 485

FIRE PERFORMANCE

Circuit IntegrityIEC 60331-23; BS 6387 CWZ (Optional)
Flame Retardance (Single Vertical Wire or cable test)IEC 60332-1-2; EN 60332-1-2
Reduced Fire Propagation (Vertically-mounted bundled wires & cables test)IEC 60332-3-24; EN 60332-3-24
Halogen FreeIEC 60754-1; EN 50267-2-1
No Corrosive Gas EmissionIEC 60754-2; EN 50267-2-2
Minimum Smoke EmissionIEC 61034-2; EN 61034-2

CABLE CONSTRUCTION

MULTIPAIR RS 485 OVERALL SCREENED DATABUS CABLE

ConductorTinned copper wire, stranded according to IEC 60228 class 2 or class5.
InsulationFoam PE or foam skin PE+SR.
Cabling ElementsInsulated cores are twisted to form pairs with varying lay length to minimize crosstalk.
Two pair cable had four cores laid in quad formation.
CablingPairs are cabled together in concentric layers.
Overall Fire BarrierMica glass tape.
Overall ScreenAluminum/polyester tape with tinned copper drain wire.
Outer SheathHalogen-free flame retardant thermoplastic LSZH compound type LTS3 as per BS 7655-6.1 (Thermosetting LSZH compound type SW2-SW4 as per BS 7655-2.6 can be offered).
Outer Sheath OptionUV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option.

MULTIPAIR RS 485 OVERALL DOUBLE SCREENED DATABUS CABLE

ConductorTinned copper wire, stranded according to IEC 60228 class 2 or class5.
InsulationFoam PE or foam skin PE.
Cabling ElementsInsulated cores are twisted to form pairs with varying lay length to minimize crosstalk. Two pair cable had four cores laid in quad formation.
CablingPairs are cabled together in concentric layers.
Overall Fire BarrierMica glass tape.
Overall ScreenAluminium/polyester tape+copper wire braid.
Outer SheathThermoplastic LSZH compound type LTS3 as per BS 7655-6.1 (Thermosetting LSZH compound type SW2-SW4 as per BS 7655-2.6 can be offered).
Outer Sheath OptionUV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option.

MULTIPAIR RS 485 INDIVIDUAL & OVERALL SCREENED DATABUS CABLE

ConductorTinned copper wire, stranded according to IEC 60228 class 2 or class5.
InsulationFoam PE or foam skin PE.
Cabling ElementsInsulated cores are twisted to form pairs with varying lay length to minimize crosstalk. Two pair cable had four cores laid in quad formation.
CablingPairs are cabled together in concentric layers.
Individual ScreenIndividual aluminium/polyester tape.
Overall Fire BarrierMica glass tape.
Overall ScreenCopper wire braid.
Outer SheathThermoplastic LSZH compound type LTS3 as per BS 7655-6.1 (Thermosetting LSZH compound type SW2-SW4 as per BS 7655-2.6 can be offered).
Outer Sheath OptionUV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option.

MULTIPAIR RS 485 OVERALL SCREENED DATABUS CABLE

ConductorTinned copper wire, stranded according to IEC 60228 class 2 or class5.
InsulationFoam PE or foam skin PE.
Cabling ElementsInsulated cores are twisted to form pairs with varying lay length to minimize crosstalk. Two pair cable had four cores laid in quad formation.
CablingPairs are cabled together in concentric layers.
Overall Fire BarrierMica glass tape.
Overall ScreenCopper wire braid.
Outer SheathThermoplastic LSZH compound type LTS3 as per BS 7655-6.1 (Thermosetting LSZH compound type SW2-SW4 as per BS 7655-2.6 can be offered).
Outer Sheath OptionUV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option.

PHYSICAL AND THERMAL PROPERTIES

Temperature range during operation (fixed state)-20°C - +90°C
Temperature range during installation (mobile state)-5°C - +60°C
Minimum bending radius8 x Overall Diameter

ELECTRICAL PROPERTIES

Dielectric test1000 V r.m.s. for 5’ (core-core)
 1000 V r.m.s. for 5’ (core-screen)
Impedance120Ω
Capacitance45 nF/km conductor to conductor
 90 nF/km conductor to shield

CONSTRUCTION PARAMETERS

Multipair RS 485 Overall Screened Databus Cable

RE-m02Y(St)H-FR/ RE-m02YS(St)H-FR

No.of PairNominal Cross Sectional AreaNo./Nominal Diameter of StrandsNominal Insulation ThicknessNominal Sheath ThicknessApprox. Overall DiameterApprox.Weight
No.mm²no/mmmmmmmmkg/km
10.227/0.21.21.16.673
20.227/0.21.21.110.9136
40.227/0.21.21.112.6214
10.5016/0.21.21.17.288
20.5016/0.21.21.112.0165
40.5016/0.21.21.114.0266
10.7524/0.21.21.17.6100
20.7524/0.21.21.112.8189
40.7524/0.21.21.115.0309
11.0032/0.21.21.17.8106
21.0032/0.21.21.113.1199
41.0032/0.21.21.115.3328

Multipair RS 485 Overall Double Screened Databus Cable

RE-m02Y(St)CH-FR / RE-m02YS(St)CH-FR

No.of PairNominal Cross Sectional AreaNo./Nominal Diameter of StrandsNominal Insulation ThicknessNominal Sheath ThicknessApprox. Overall DiameterApprox.Weight
No.mm²no/mmmmmmmmkg/km
10.227/0.21.21.17.191
20.227/0.21.21.111.4168
40.227/0.21.21.113.1252
10.5016/0.21.21.17.7108
20.5016/0.21.21.112.5201
40.5016/0.21.21.114.5308
10.7524/0.21.21.18.1121
20.7524/0.21.21.113.3228
40.7524/0.21.21.115.5355
11.0032/0.21.21.18.8128
21.0032/0.21.21.113.6238
41.0032/0.21.21.115.8375

Multipair RS 485 Individual & Overall screened Databus Cable

RE-m02Y(St)CH PiMF-FR / RE-m02YS(St)CH-FR PiMF-FR

No.of PairNominal Cross Sectional AreaNo./Nominal Diameter of StrandsNominal Insulation ThicknessNominal Sheath ThicknessApprox. Overall DiameterApprox.Weight
No.mm²no/mmmmmmmmkg/km
10.227/0.21.21.17.494
20.227/0.21.21.112.1176
40.227/0.21.21.114.0266
10.5016/0.21.21.18.0111
20.5016/0.21.21.113.3210
40.5016/0.21.21.115.5325
10.7524/0.21.21.18.4125
20.7524/0.21.21.114.2237
40.7524/0.21.21.116.6372
11.0032/0.21.21.18.6131
21.0032/0.21.21.114.5248
41.0032/0.21.21.117.0393

Multipair RS 485 Overall Screened Databus Cable

RE-m02YCH-FR / RE-m02YSCH-FR

No.of PairNominal Cross Sectional AreaNo./Nominal Diameter of StrandsNominal Insulation ThicknessNominal Sheath ThicknessApprox. Overall DiameterApprox.Weight
No.mm²no/mmmmmmmmkg/km
10.227/0.21.21.16.986
20.227/0.21.21.111.2160
40.227/0.21.21.113.0243
10.5016/0.21.21.17.5123
20.5016/0.21.21.112.3193
40.5016/0.21.21.114.3299
10.7524/0.21.21.17.9116
20.7524/0.21.21.113.1219
40.7524/0.21.21.115.3344
11.0032/0.21.21.18.0122
21.0032/0.21.21.113.4229
41.0032/0.21.21.115.6364


KEY FEATURES

  • Overall mica glass tape fire barrier.

  • 120 ohm impedance and four foil or braid screening constructions.

SELECTION NOTES

Choose screening construction, pair count and conductor area. Specify the required fire performance option with the cable design; BS 6387 CWZ is listed as optional.

RELATED PRODUCTS

FREQUENTLY ASKED QUESTIONS

Where is the fire barrier positioned?

An overall mica glass tape barrier surrounds the cabled pair assembly.

What impedance is specified?

The listed cable impedance is 120 ohms.

Which screening constructions are listed?

Overall foil; overall foil plus braid; individual pair foil with overall braid; and overall copper braid.

Which pair counts and conductor areas are available?

The tables list 1, 2 and 4 pairs in 0.22, 0.50, 0.75 and 1.00 mm² sizes.

What sheath material is used?

The standard sheath is thermoplastic LSZH; thermosetting LSZH is offered as an option.

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