This instrumentation range is a particular group of multipair cables with flexible conductors and numbered cores for the interconnection of electrical instruments and control equipment in industry and processing plants and is a vital link in remote monitoring sensory control systems such as 4-20mA current loop signalling, supervisory control and data acquisition (SCADA) systems, resistance temperature detectors (RTD) and thermocouple remote monitoring. They can be used in RS232, RS422 & RS485 applications such as the interconnection / interface of electronic process control equipment and are suitable for use in those areas where it is necessary to provide protection from:

• interference to the transmission signal by other electrical circuits.
• physical damage to the cable by including in the designs various screens and coverings.
• The cables have an insulation rating based on sheath thickness of 600V and can be installed with power cables of rating 600/1000V.

Typical uses are for interconnecting: 

• electrical measuring devices to instrument panel 
• instrument to instrument; electrical sensing devices 
• control cabinets to supervisory consoles and panels 
• remote auxiliary contacts to supervisory indicators 
• telemeters to recorders and annunciators and for general transmission of electrical signals in any systems of remote control, indicators, telemetering, monitoring and analysis where rugged communication type cable is required. 
• Typical wiring systems will use multi-pair cables to connect control room equipment to junction panels in field junction boxes. Single pair cables are used to connect junction panels to field devices. 
  These cables are intended for use in instrumentation and control circuits where the normal operating voltages would not be expected to exceed 110V rms. This rugged cable range complies to the following International standards:

Underwriters Laboratories Style 2464.
Intrinsically Safe circuits to AS 2380.7 & AS 2381.7
The range is fire retardant to IEC 332 Part 3, Category A.
Australian standards AUSTEL TS008

CONDUCTORS: 

Flexible stranded plain annealed copper (PAC) conductors are used.
B50xx, B53xx: 20 AWG (0.5mm�)
B51xx, B55xx, B56xx: 16 AWG (1.5mm�)

20AWG conductors are suitable for currents up to 3 amps, while the larger conductors of the B55/B56 range of cables can be selected to allow a maximum continuous current rating of up to 13 amps.

INSULATION:

These cables use a high quality flame retartant PVC insulation that can withstand high temperature operation. Halogen free materials can be subsituted for specialist installations, please consult our company representitives.

SCREENING: 

CS All instrumentation cables are overall screened to provide shielding from outside interference. 
ESCS This offers improved signal shielding, each unit in the cable is shielded against interference from signals on other elements within the cable, followed by an overall screen to protect from external sources. 

MECHANICAL PROTECTION:

SWA While all cables offer very robust construction, additional armouring can be added to protect the cable from mechanical stresses and damage.
 
SHEATHING:

BL Blue sheaths can be requested suitable for instrinsically safe installations to AS 2380.7 & AS2381.7 
HFS Halogen free materials can be used where the highest level of safety and environmental requirements are needed. 

HARSH ENVIRONMENTS: 

NJ Nylon Jacket, offering termite protection. 
MB Moisture Barrier, where protection from wet environmental conditions is required. 
SPEAR A SPEAR sheath is a protective outer jacket construction that can be applied to the standard instrumentation cable range. It can also be used to protect power and optical fibre cables in harsh environments. A SPEAR sheath is used in situations where buried cables need protection from moisture, oil, fuel, hydrocarbons, solvents, acids and a variety of organic and inorganic chemicals. A SPEAR sheath is principally specified for oil refineries, or any petrochemical or industrial application where the conditions could damage the installed cable. 

The SPEAR advantages over traditional lead sheath are; lighter, more flexible, safer, easier to install, corrosion resistant, less expensive. Local and multi-national organisations such as BP, Caltex, Mobil, PRA, and Shell have used the SPEAR construction to protect their cables. Note that instrumentation cables are not regarded as power cables or for the direct connection of equipment to mains power supplies.