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Instrumentation & Signal Cables

Cables   /   General   /   Instrumentation & Signal Cables

Features

Instrumentation cables are designed for the transmission of Analog and Digital Signals in Control Systems. Cables are designed and made to ensure an extremely high level of accuracy and sensitivity, with minimal electromagnetic noise, interference and cross-talk.

Individual pairs are colour coded for simple identification & hook-up. Individual pair shielding options are recommended for use in Intrinsically Safe Systems.

Characteristics

  • Signal protection between pairs
  • Electromagnetic protection from external interference
  • Aluminium Mylar Tape screening protects the signal/data transmission from electromagnetic interference
  • Flame & Fire Retardant options are designed to withstand extreme fire conditions, with minimal emission of toxic smoke and gases
  • Solid or stranded conductors provided based on flexibility requirement of customer

Applications

  • Transmission of analog & digital signals in control systems
  • Audio, intercom, control, energy measurements, alarm circuits, DCS, SCADA etc.
  • Primarily for indoor & dry locations

Cable Categories

  • G-Type Unarmoured - Collective Screen, Sheathed Cable
  • G-Type Armoured - Collective Screen, Inner Sheath, Armour, Sheathed Cable
  • F-Type Unarmoured - Individual Screen, Collective Screen, Sheathed Cable
  • F-Type Armoured - Individual Screen, Collective Screen, Inner Sheath, Armour, Sheathed Cable

Conductor Construction

Nominal Area of Conductor No. of wires / Dia of wires
Solid (Class 1) Solid (Class 1) Solid (Class 1)
Sqmm Nos. / mm Nos. / mm Nos. / mm
0.5 1 / 0.80 7 / 0.30 16 / 0.20
0.75 1 / 0.98 7 / 0.37 24 / 0.20
1 1 / 1.13 7 / 0.43 32 / 0.20
1.5 1 / 1.38 7 / 0.52 30 / 0.25
2.5 1 / 1.78 7 / 0.67 50 / 0.25

Cable Construction

Process Features / Material
Conductor Electrolytic grade Annealed Bare or Tin plated Copper Wires
Insulation PVC / FRLS-PVC / HR-PVC / PE / XLPE / LSZH / FEP / PTFE / EPR or as per requirement
Core & Pair Identification Insulation colouring, number printing, Ring marking or a combination of the above
Pairing Twisting of two cores to form a pair
Screen on Individual Pair (if required) Pair screened with Aluminium Mylar Tape of 100% coverage with Tinned Copper Drain Wire
Laying Pairs laid up suitably with polyester binder tape if required
Collective Screen Laid up cable screened with Aluminium Mylar Tape of 100% coverage with Tinned Copper Drain Wire
Sheath PVC / FR-PVC / FRLS-PVC / HR-PVC / LSZH / FEP / PTFE or as per requirement

Individual and/or Collective Braid Shielding, Pair Jacketing etc can be provided as well.

Electrical & Transmission Characteristics

Electrical & Transmission Characteristics Reference Standard
Conductor Resistance IS 8130
Dielectric Constant IS 5608 Part 1 or BS 5308 Part 1 & 2
Volume Resistivity IS 5608 Part 2 or BS 5308 Part 1 & 2
Mutual Capacitance IS 5608 Part 3 or BS 5308 Part 1 & 2
Characteristic Impedance IEC 189 or BS 5308 Part 1 & 2
Cross Talk / Attenuation VDE 0815
Inductance VDE 0816 or BS 5308 Part 1 & 2

Fire Performance

Property Ref Standard Flame Retardant (FR) Flame Retardant Low Smoke (FRLS) Low Smoke Zero Halogen (LSZH)
Oxygen Index ASTM D 2863 / IS 10810-58 >29% >29% >29%
Temperature Index ASTM D 2863 / IS 10810-58 >250°C >250°C >250°C
Smoke Density Rating ASTM D 2843 <60% <20%
Halogen Acid Gas Generation IEC 60754-1 <20% <0.5%
Flame Test IEC 60332-1 As per specification

Fire Survival Cables can be provided in all of the above styles

Ring Marking & Ring Colours

Unit Ref Standard Ring Marking Colour of Ring Marking
1, 5, 9 Ring colours for unit 1 to 4 is Pink
2, 6, 10 Ring colours for unit 5 to 8 is Orange
3, 7, 11 Ring colours for unit 9 to 12 is Violet
4, 8, 12