APPLICATION
Designed specifically for RS 485 data communication systems that require stable operation during emergencies such as fires. This series of cables combines low-capacitance insulation with multiple high-efficiency shielding structures to ensure high-speed, interference-free data transmission even in fire environments, guaranteeing uninterrupted critical communication links.
The product complies with the EIA/TIA 485 basic design standard and has obtained multiple international fire safety certifications: it features circuit integrity (IEC 60331-23/BS 6387 CWZ optional) and meets stringent performance requirements for flame retardancy (IEC 60332-1-2), bundle flame retardancy (IEC 60332-3-24), halogen-free (IEC 60754-1), non-corrosive gas emission (IEC 60754-2), and low smoke emission (IEC 61034-2).
The cable structure is diverse, covering various RS 485 bus cable types such as overall shielding, double overall shielding, and pair shielding plus overall shielding. The conductors are made of tinned copper strands, with insulation of foamed PE or foamed skin PE. The twisted pairs are designed with variable lay lengths to effectively reduce crosstalk. The entire series incorporates a built-in mica glass tape fire-resistant layer, and the outer sheath is made of low-smoke, halogen-free, flame-retardant material (compliant with BS 7655). Optional features include UV resistance, oil and hydrocarbon resistance, and rodent/insect resistance.
Excellent electrical performance: characteristic impedance of 120Ω, operating temperature range of -20°C to +90°C, installation temperature range of -5°C to +60°C, minimum bending radius of 8 times the outer diameter, conductor-to-conductor capacitance ≤45 nF/km, conductor-to-shield capacitance ≤90 nF/km, and passing a 1000V withstand voltage test.
Suitable for applications with stringent requirements for communication reliability and fire safety, such as fire emergency systems, industrial automation, building automation, and transportation systems.
STANDARDS
Basic design adapted to EIA/TIA 485
FIRE PERFORMANCE
| Circuit Integrity | IEC 60331-23; BS 6387 CWZ (Optional) |
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| Flame Retardance (Single Vertical Wire or cable test) | IEC 60332-1-2; EN 60332-1-2 |
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| Reduced Fire Propagation (Vertically-mounted bundled wires & cables test) | IEC 60332-3-24; EN 60332-3-24 |
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| Halogen Free | IEC 60754-1; EN 50267-2-1 |
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| No Corrosive Gas Emission | IEC 60754-2; EN 50267-2-2 |
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| Minimum Smoke Emission | IEC 61034-2; EN 61034-2 |
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CABLE CONSTRUCTION
MULTIPAIR RS 485 OVERALL SCREENED DATABUS CABLE
| Conductor | Tinned copper wire, stranded according to IEC 60228 class 2 or class5. |
| Insulation | Foam PE or foam skin PE+SR. |
| Cabling Elements | Insulated cores are twisted to form pairs with varying lay length to minimize crosstalk.
Two pair cable had four cores laid in quad formation. |
| Cabling | Pairs are cabled together in concentric layers. |
| Overall Fire Barrier | Mica glass tape. |
| Overall Screen | Aluminum/polyester tape with tinned copper drain wire. |
| Outer Sheath | Halogen-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 Option | UV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option. |
MULTIPAIR RS 485 OVERALL DOUBLE SCREENED DATABUS CABLE
| Conductor | Tinned copper wire, stranded according to IEC 60228 class 2 or class5. |
| Insulation | Foam PE or foam skin PE. |
| Cabling Elements | Insulated cores are twisted to form pairs with varying lay length to minimize crosstalk. Two pair cable had four cores laid in quad formation. |
| Cabling | Pairs are cabled together in concentric layers. |
| Overall Fire Barrier | Mica glass tape. |
| Overall Screen | Aluminium/polyester tape+copper wire braid. |
| Outer Sheath | 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 Option | UV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option. |
MULTIPAIR RS 485 INDIVIDUAL & OVERALL SCREENED DATABUS CABLE
| Conductor | Tinned copper wire, stranded according to IEC 60228 class 2 or class5. |
| Insulation | Foam PE or foam skin PE. |
| Cabling Elements | Insulated cores are twisted to form pairs with varying lay length to minimize crosstalk. Two pair cable had four cores laid in quad formation. |
| Cabling | Pairs are cabled together in concentric layers. |
| Individual Screen | Individual aluminium/polyester tape. |
| Overall Fire Barrier | Mica glass tape. |
| Overall Screen | Copper wire braid. |
| Outer Sheath | 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 Option | UV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option. |
MULTIPAIR RS 485 OVERALL SCREENED DATABUS CABLE
| Conductor | Tinned copper wire, stranded according to IEC 60228 class 2 or class5. |
| Insulation | Foam PE or foam skin PE. |
| Cabling Elements | Insulated cores are twisted to form pairs with varying lay length to minimize crosstalk. Two pair cable had four cores laid in quad formation. |
| Cabling | Pairs are cabled together in concentric layers. |
| Overall Fire Barrier | Mica glass tape. |
| Overall Screen | Copper wire braid. |
| Outer Sheath | 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 Option | UV 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 radius | 8 x Overall Diameter |
ELECTRICAL PROPERTIES
| Dielectric test | 1000 V r.m.s. for 5’ (core-core) |
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| | 1000 V r.m.s. for 5’ (core-screen) |
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| Impedance | 120Ω |
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| Capacitance | 45 nF/km conductor to conductor |
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| | 90 nF/km conductor to shield |
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CONSTRUCTION PARAMETERS
Multipair RS 485 Overall Screened Databus Cable
RE-m02Y(St)H-FR/ RE-m02YS(St)H-FR
| No.of Pair | Nominal Cross Sectional Area | No./Nominal Diameter of Strands | Nominal Insulation Thickness | Nominal Sheath Thickness | Approx. Overall Diameter | Approx.Weight |
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| No. | mm² | no/mm | mm | mm | mm | kg/km |
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| 1 | 0.22 | 7/0.2 | 1.2 | 1.1 | 6.6 | 73 |
| 2 | 0.22 | 7/0.2 | 1.2 | 1.1 | 10.9 | 136 |
| 4 | 0.22 | 7/0.2 | 1.2 | 1.1 | 12.6 | 214 |
| 1 | 0.50 | 16/0.2 | 1.2 | 1.1 | 7.2 | 88 |
| 2 | 0.50 | 16/0.2 | 1.2 | 1.1 | 12.0 | 165 |
| 4 | 0.50 | 16/0.2 | 1.2 | 1.1 | 14.0 | 266 |
| 1 | 0.75 | 24/0.2 | 1.2 | 1.1 | 7.6 | 100 |
| 2 | 0.75 | 24/0.2 | 1.2 | 1.1 | 12.8 | 189 |
| 4 | 0.75 | 24/0.2 | 1.2 | 1.1 | 15.0 | 309 |
| 1 | 1.00 | 32/0.2 | 1.2 | 1.1 | 7.8 | 106 |
| 2 | 1.00 | 32/0.2 | 1.2 | 1.1 | 13.1 | 199 |
| 4 | 1.00 | 32/0.2 | 1.2 | 1.1 | 15.3 | 328 |
Multipair RS 485 Overall Double Screened Databus Cable
RE-m02Y(St)CH-FR / RE-m02YS(St)CH-FR
| No.of Pair | Nominal Cross Sectional Area | No./Nominal Diameter of Strands | Nominal Insulation Thickness | Nominal Sheath Thickness | Approx. Overall Diameter | Approx.Weight |
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| No. | mm² | no/mm | mm | mm | mm | kg/km |
|---|
| 1 | 0.22 | 7/0.2 | 1.2 | 1.1 | 7.1 | 91 |
| 2 | 0.22 | 7/0.2 | 1.2 | 1.1 | 11.4 | 168 |
| 4 | 0.22 | 7/0.2 | 1.2 | 1.1 | 13.1 | 252 |
| 1 | 0.50 | 16/0.2 | 1.2 | 1.1 | 7.7 | 108 |
| 2 | 0.50 | 16/0.2 | 1.2 | 1.1 | 12.5 | 201 |
| 4 | 0.50 | 16/0.2 | 1.2 | 1.1 | 14.5 | 308 |
| 1 | 0.75 | 24/0.2 | 1.2 | 1.1 | 8.1 | 121 |
| 2 | 0.75 | 24/0.2 | 1.2 | 1.1 | 13.3 | 228 |
| 4 | 0.75 | 24/0.2 | 1.2 | 1.1 | 15.5 | 355 |
| 1 | 1.00 | 32/0.2 | 1.2 | 1.1 | 8.8 | 128 |
| 2 | 1.00 | 32/0.2 | 1.2 | 1.1 | 13.6 | 238 |
| 4 | 1.00 | 32/0.2 | 1.2 | 1.1 | 15.8 | 375 |
Multipair RS 485 Individual & Overall screened Databus Cable
RE-m02Y(St)CH PiMF-FR / RE-m02YS(St)CH-FR PiMF-FR
| No.of Pair | Nominal Cross Sectional Area | No./Nominal Diameter of Strands | Nominal Insulation Thickness | Nominal Sheath Thickness | Approx. Overall Diameter | Approx.Weight |
|---|
| No. | mm² | no/mm | mm | mm | mm | kg/km |
|---|
| 1 | 0.22 | 7/0.2 | 1.2 | 1.1 | 7.4 | 94 |
| 2 | 0.22 | 7/0.2 | 1.2 | 1.1 | 12.1 | 176 |
| 4 | 0.22 | 7/0.2 | 1.2 | 1.1 | 14.0 | 266 |
| 1 | 0.50 | 16/0.2 | 1.2 | 1.1 | 8.0 | 111 |
| 2 | 0.50 | 16/0.2 | 1.2 | 1.1 | 13.3 | 210 |
| 4 | 0.50 | 16/0.2 | 1.2 | 1.1 | 15.5 | 325 |
| 1 | 0.75 | 24/0.2 | 1.2 | 1.1 | 8.4 | 125 |
| 2 | 0.75 | 24/0.2 | 1.2 | 1.1 | 14.2 | 237 |
| 4 | 0.75 | 24/0.2 | 1.2 | 1.1 | 16.6 | 372 |
| 1 | 1.00 | 32/0.2 | 1.2 | 1.1 | 8.6 | 131 |
| 2 | 1.00 | 32/0.2 | 1.2 | 1.1 | 14.5 | 248 |
| 4 | 1.00 | 32/0.2 | 1.2 | 1.1 | 17.0 | 393 |
Multipair RS 485 Overall Screened Databus Cable
RE-m02YCH-FR / RE-m02YSCH-FR
| No.of Pair | Nominal Cross Sectional Area | No./Nominal Diameter of Strands | Nominal Insulation Thickness | Nominal Sheath Thickness | Approx. Overall Diameter | Approx.Weight |
|---|
| No. | mm² | no/mm | mm | mm | mm | kg/km |
|---|
| 1 | 0.22 | 7/0.2 | 1.2 | 1.1 | 6.9 | 86 |
| 2 | 0.22 | 7/0.2 | 1.2 | 1.1 | 11.2 | 160 |
| 4 | 0.22 | 7/0.2 | 1.2 | 1.1 | 13.0 | 243 |
| 1 | 0.50 | 16/0.2 | 1.2 | 1.1 | 7.5 | 123 |
| 2 | 0.50 | 16/0.2 | 1.2 | 1.1 | 12.3 | 193 |
| 4 | 0.50 | 16/0.2 | 1.2 | 1.1 | 14.3 | 299 |
| 1 | 0.75 | 24/0.2 | 1.2 | 1.1 | 7.9 | 116 |
| 2 | 0.75 | 24/0.2 | 1.2 | 1.1 | 13.1 | 219 |
| 4 | 0.75 | 24/0.2 | 1.2 | 1.1 | 15.3 | 344 |
| 1 | 1.00 | 32/0.2 | 1.2 | 1.1 | 8.0 | 122 |
| 2 | 1.00 | 32/0.2 | 1.2 | 1.1 | 13.4 | 229 |
| 4 | 1.00 | 32/0.2 | 1.2 | 1.1 | 15.6 | 364 |
