The Hermesys ChimeraX™ MODBUS RS-485 Communication Cable is a shielded, twisted-pair cable line built for industrial serial data communication. Offered across multiple conductor sizes and pair counts, with unarmoured and armoured jacket options, it covers a wide range of MODBUS/RS-485 network installations from control cabinets to outdoor and direct-buried runs.
Key Features and Benefits
- Twisted, individually foil-shielded pairs with a drain wire suppress electromagnetic interference for reliable MODBUS/RS-485 signal integrity over long runs
- An overall tinned copper braid shield adds a second layer of EMI protection and improves grounding continuity at connectors
- Offered in 20AWG, 22AWG, 24AWG, and 1mm² conductor sizes with 1 to 4 pairs, so installers can match wire gauge and pair count to the specific network’s cable-run length and device count
- A steel wire braided armour with an FR-LSOH outer jacket is available on the 1mm² variant, adding crush/impact protection and low-smoke, zero-halogen fire performance for enclosed or safety-critical spaces
- A galvanized-steel-wire-armoured, LSOH-jacketed 3-pair variant with anti-termite/anti-rodent additive is available for direct-buried or pest-prone outdoor installations
- Impedance held at 120Ω across the range keeps line matching consistent for RS-485 differential signaling
- A wide operating temperature range suits both indoor control cabinets and outdoor equipment enclosures
- Tinned copper conductors resist corrosion, extending service life in humid or coastal industrial environments
Typical Applications
- Industrial Automation and MODBUS Networks
- Building Management Systems (BMS)
- Instrumentation and Process Control Wiring
- SCADA and Remote Monitoring Systems
Reference Standard
- IEC 60332-1-1/2 (Standard and SWB FR-LSOH variants)
- UL CM (Standard and SWB FR-LSOH variants)
- IEC 60332-3C (SWB FR-LSOH variant)
- IEC 61034 (SWB FR-LSOH variant, Low Smoke)
- IEC 60754-1 & 60754-2 (SWB FR-LSOH variant, Zero Halogen)
Technical Data — Standard RS-485 Cable
Conductor Material
Stranded Tinned Copper
Insulation Material
Foam PE
Screen
Al-Mylar Wrap, Overlapping (100% Coverage)
Drain Wire Material
Stranded Tinned Copper
Braid Shield Material
Tinned Copper
Outer Jacket Material
PVC
Outer Jacket Colour
Grey (RAL 7046)
Pair Colour Coding
Pair 1 White/Blue, Pair 2 White/Orange, Pair 3 White/Green, Pair 4 White/Brown
Bend Radius
10× Outer Diameter
Operating Temperature Range
-20°C to +70°C
Impedance @200MHz
120Ω ±10%
Max. Operating Voltage
300V
| Pair Count |
Insulation OD (mm) |
Drain Wire (mm) |
Braid Shield Coverage |
Conductor DC Resistance (Ω/km) |
Capacitance C-C (pF/m) |
Capacitance C-Shield (pF/m) |
Outer Jacket OD (mm) |
| 20AWG — Conductor 7×0.32 mm |
| 1 Pair |
2.40 ± 0.2 |
7×0.254 |
≥65% |
36.7 |
40.0 ±15% |
75.0 ±15% |
7.6 ±5% |
| 2 Pair |
2.40 ± 0.2 |
7×0.254 |
≥65% |
36.7 |
40.0 ±15% |
75.0 ±15% |
11.00 ±5% |
| 3 Pair |
2.40 ± 0.2 |
7×0.254 |
≥65% |
36.7 |
40.0 ±15% |
75.0 ±15% |
11.60 ±5% |
| 4 Pair |
2.40 ± 0.2 |
7×0.254 |
≥65% |
36.7 |
40.0 ±15% |
75.0 ±15% |
12.70 ±5% |
| 22AWG — Conductor 7×0.254 mm |
| 1 Pair |
2.00 ± 0.2 |
7×0.254 |
≥65% |
58.0 |
40.0 ±15% |
70.0 ±15% |
7.1 ±5% |
| 2 Pair |
2.00 ± 0.2 |
7×0.254 |
≥65% |
58.0 |
40.0 ±15% |
70.0 ±15% |
8.90 ±5% |
| 3 Pair |
2.00 ± 0.2 |
7×0.254 |
≥65% |
58.0 |
40.0 ±15% |
70.0 ±15% |
9.50 ±5% |
| 4 Pair |
2.00 ± 0.2 |
7×0.254 |
≥65% |
58.0 |
40.0 ±15% |
70.0 ±15% |
11.40 ±5% |
| 24AWG — Conductor 7×0.2 mm |
| 1 Pair |
1.70 ± 0.2 |
7×0.2 |
≥90% |
85.0 |
42.0 ±15% |
75.4 ±15% |
6 ±5% |
| 2 Pair |
1.70 ± 0.2 |
7×0.2 |
≥90% |
85.0 |
42.0 ±15% |
75.4 ±15% |
8.6 ±5% |
| 3 Pair |
1.70 ± 0.2 |
7×0.2 |
≥90% |
85.0 |
42.0 ±15% |
75.4 ±15% |
9.1 ±5% |
| 4 Pair |
1.70 ± 0.2 |
7×0.2 |
≥90% |
85.0 |
42.0 ±15% |
75.4 ±15% |
9.9 ±5% |
| 1mm² — Conductor 19×0.235 mm |
| 1 Pair |
2.70 ± 0.2 |
7×0.254 |
≥65% |
23.2 |
40.0 ±15% |
75.0 ±15% |
8.20 ±5% |
| 2 Pair |
2.70 ± 0.2 |
7×0.254 |
≥65% |
23.2 |
40.0 ±15% |
75.0 ±15% |
12.00 ±5% |
| 3 Pair |
2.70 ± 0.2 |
7×0.254 |
≥65% |
23.2 |
40.0 ±15% |
75.0 ±15% |
12.70 ±5% |
| 4 Pair |
2.70 ± 0.2 |
7×0.254 |
≥65% |
23.2 |
40.0 ±15% |
75.0 ±15% |
14.00 ±5% |
Technical Data — SWB Armoured, FR-LSOH Jacket (1mm²)
Conductor Material
Stranded Tinned Copper
Conductor Size (Nom.)
19×0.235 mm (1mm²)
Insulation Material
Foam PE
Insulation OD (Nom.)
2.70 ± 0.2 mm
Screen
Al-Mylar Wrap, Overlapping (100% Coverage)
Drain Wire
7×0.254 mm Stranded Tinned Copper
Braid Shield
Tinned Copper (≥65% Coverage)
Inner Jacket Material
LSOH
Armour
Steel Wire Braiding
Armour Thickness (Nom.)
0.3 mm
Outer Jacket Material
FR-LSOH
Outer Jacket Colour
Black (RAL 9002)
Conductor DC Resistance @20±5°C
23.2 Ω/km
Impedance @200MHz
120Ω ±10%
Capacitance Conductor-to-Conductor
40.0 pF/m ±15%
Capacitance Conductor-to-Shield
75.0 pF/m ±15%
Bend Radius
10× Outer Diameter
Operating Temperature Range
-20°C to +70°C
Max. Operating Voltage
300V
Inner Jacket OD (mm)
Outer Jacket OD (mm)
Technical Data — AT-AR Armoured, 3 Pair 20AWG (GSWA)
Conductor Material
Stranded Tinned Copper
Conductor Size (Nom.)
7×0.254 mm (0.76mm)
Insulation Material
Foam PE
Insulation OD (Nom.)
0.52 mm
Insulation Colour
Pair 1 White/Blue, Pair 2 White/Orange, Pair 3 White/Black
Screen
Al-Mylar Wrap, Overlapping (100% Coverage)
Filler Assembly
Twist with 3 Pair in S Direction
Drain Wire (Nom.)
7×0.254 mm Stranded Tinned Copper
Braid Shield (Nom.)
0.12 mm Tinned Copper (≥85% Coverage)
Inner Jacket (Nom.)
1.4 mm
Armour (Nom.)
0.9 mm, Galvanized Steel Wire
Outer Jacket (Nom.)
2.0 mm, LSOH with AT/AR Additive
Overall Diameter (Nom.)
16.1 ± 0.4 mm
Conductor Resistance @20±5°C
40 Ω/km
