RS-485 Cables
An RS-485 cable is a twisted-pair, shielded data cable that connects devices on an RS-485 serial communication line. It is used on multi-drop data buses between PLCs, frequency inverters, energy analyzers, meters and building automation devices that communicate with protocols such as Modbus RTU. In this category, LI2Y(St)CH halogen-free sheathed and LI2Y(St)CY PVC-sheathed types made by Mekas, 2M Kablo and Erse, in a 2x2x0.22 mm² construction with foil and copper braid shielding, are sold by the meter. Choose the sheath material according to the installation environment and the building's fire requirement; compare the characteristic impedance, capacitance and shield construction with the device manufacturer's cable requirement, taking the line length and communication speed into account. An RS-485 line is installed in a daisy-chain from device to device, and a terminating resistor matching the cable's characteristic impedance is used at both ends of the line. Even though it uses the same physical layer, the Profibus DP line has its own defined cable type, and a general-purpose RS-485 cable does not replace a Profibus cable.
Products
- 2M Kablo BUS Cables LI2Y(St)CH 2x2x0.22 mm2 RS-485 Gray — 2M Kablo · SKU: 3B11G105002-02A · TRY 79.74 · Made to order
- Erse LI2Y(St)CH ( RS 485 ) 2x2x0.22 mm2 Cable — Erse Kablo · SKU: MDER022600200022G · TRY 79.74 · Made to order
- Mekas RS-485 LI2Y(St)CY 2x2x0.22 mm2 Industrial 4.0 Cable — Mekas Kablo · SKU: 11145 · TRY 36.47 · In stock
- Mekas RS-485 LI2Y(St)CH 2x2x0.22 mm2 Industrial 4.0 Cable — Mekas Kablo · SKU: 11399 · TRY 38.17 · Made to order
How to choose RS-485 Cables
An RS-485 cable is a twisted-pair, shielded data cable that connects devices on an RS-485 serial communication line. It is used on multi-drop data buses between PLCs, frequency inverters, energy analyzers, meters and building automation devices that communicate with protocols such as Modbus RTU.
- Clarify the circuit duty first: power distribution, control, fire safety, Ethernet or analog signal.
- Compare conductor cross-section, core count, insulation and shielding against the installation route.
- Switch to the proper cable family early when flex duty, oil resistance, halogen-free jacket or fire integrity is required.
Frequently asked questions
What is RS-485 Cables and where is it used?
An RS-485 cable is a twisted-pair, shielded data cable that connects devices on an RS-485 serial communication line. It is used on multi-drop data buses between PLCs, frequency inverters, energy analyzers, meters and building automation devices that communicate with protocols such as Modbus RTU.
What should I compare when choosing RS-485 Cables?
Choose the sheath material according to the installation environment and the building's fire requirement; compare the characteristic impedance, capacitance and shield construction with the device manufacturer's cable requirement, taking the line length and communication speed into account.
Where can I find technical details for RS-485 Cables products?
Even though it uses the same physical layer, the Profibus DP line has its own defined cable type, and a general-purpose RS-485 cable does not replace a Profibus cable.
Industrial and Fieldbus Communication Cables Selection Guide