PVC, PE or HFFR sheathed cables for BUS and Interface Systems
RS-232, RS-422, RS-485, KNX (EIB or Instabus), LonWorks, ModBus, M-Bus, CAN-bus, BACnet, BMS (Building Management Systems) or general interface systems.
2. Basic Construction of the cables Wire = conductor without or with insulation. With insulation sometimes also indicated as core. Conductor: may be solid = one single rod or flexible = twisted bare or tinned copper strands, ranging from 12 to 24AWG.
DC Resistance (Ohm/km)
7 x 32
7 x 0.20
7 x 30
7 x 0.25
7 x 28
7 x 0.32
7 x 26
7 x 0.40
19 x 29
19 x 0.28
19 x 27
19 x 0.36
19 x 25
19 x 0.45
Insulation: Polyethylene (PE) or Foam PE (FPE) for PVC (Polyvinyl Chloride) or Halogen-Free (HFFR) sheathed cables. And Halogen-Free (HFFR) for HFFR sheathed cables. All insulations are in accordance with BS EN 50290-2, good strippable and coloured. The colours are not interchangeable.
Pair = two twisted – colour coded – wires.
Individually screened pair (if applicable): one pair wrapped with an Aluminium/Polyester foil under which a drain wire.
Cable core: two or more (individually screened) pairs stranded.
Good twisting (lay-length < 30 ~ 40D) is necessary otherwise the cable can hardly be bending and will break after a few bends.
Drain wire (only in combination with a screen): stranded tinned copper wires. In order to avoid corrosion, it is recommended that drain wires are tinned.
Screen (if applicable): Helically applied (= as a spiral) Aluminium/Polyester (Alpet) foil. For the flexibility of a cable a helically applied foil is to be preferred. A longitudinally applied foil act more as a stiff tube = more difficult to bend.
Braiding (if applicable): tinned copper wires.
Sheath: grey PVC , black PE or purple HFFR, all in accordance with BS EN 50290-2.
Cable Configuration Insulation
Cable Configuration Sheath
Halogen-free(non acid, non toxic)
PE, FPE or PVC
according to IEC 60332-1
PE, FPE or PVC
Only with (F)PE insulation
PE, FPE or HFFR
according to IEC 60332-3-24
-according to IEC 61034-1-2
according to IEC 60754-1 & 2
Operating temperature range: -25 to +75 °C and Rated Voltage: 300 Vrms
RS-232: Hand shake interface used for low data rates. Computer to printer or to modem or to another device.
RS-422: Balanced digital circuit. Medium speed data exchange. Long line modems and Daisy chain configuration.
RS-485: Balanced digital circuit. Medium speed fieldbus interfaces.
LonWorks is a networking platform specifically created to address the needs of control applications. The platform is built on a protocol created by Echelon Corporation for networking devices over media such as twisted pair, power lines, fibre optics, and RF. It is used for the automation of various functions within buildings such as lighting and HVAC. BT Cables main part numbers for LonWorks: C1198 (PVC) - C1203 (PVC) – C1307 (HFFR) – C1271 (HFFR) – C1346 (HFFR) – C1347 (HFFR) – C1348 (HFFR) and C1349 (HFFR).
M-Bus (Meter-Bus) is a European standard (EN 13757-2 physical and link layer, EN 13757-3 application layer) for the remote reading of gas or electricity meters. M-Bus is also usable for other types of consumption meters. BT Cables main part number for M-bus: C1020 – C1193.
Controller–area network (CAN or CAN-bus) is a vehicle bus standard designed specifically for automotive applications but now also used in other areas such as industrial automation and medical equipment.
CAN bus utilize TIA/EIA-485 cables.
BT Cables main part numbers for CAN-bus: C1080 - C1189 – C1190 – C1191 – C1192 – C1295 – C1296 – C1297 and HFFR cables C1318 – C1319 – C1320 – C1321.
BACnet is a communications protocol for building automation and control networks. It is was designed to allow communication of building automation and control systems for applications such as heating, ventilating, and air-conditioning control, lighting control, access control, and fire detection systems and their associated equipment. BACnet over IP can utilize Cat 6. BT Cables main part numbers for BACnet: C1228 (PVC) – C1189 (PVC) – C1190 (PVC) - C1318 (HFFR)
and C1319 (HFFR).