Published on:2026-05-24 Click:20
5-core FTP RS-485 control cable with PE jacket for underwater use. Shielded for reliable RS-485 Modbus communication in subsea instrument and ROV control systems.
The 5-core FTP underwater cable with PE jacket is optimised for RS-485, RS-422, and Modbus RTU communication in subsea environments. The FTP construction (foil-shielded twisted pair) provides the differential-mode noise rejection essential for reliable RS-485 bus communication in electrically noisy ROV and subsea instrument environments. With five conductors, the cable supports a full RS-485 bus (A+, B-, GND) plus two additional signal or power cores in a single run.
| Parameter | Specification |
|---|---|
| Cores | 5 x stranded tinned copper |
| Shielding | FTP (Al-foil + drain wire per pair) + overall (optional) |
| Jacket | Polyethylene (PE) -- seawater resistant |
| Impedance | ~120 Ohm (matched for RS-485) |
| Voltage Rating | 300V |
| Temperature Range | -40°C to +70°C |
| Colour | Black |
| Custom | PE or PUR jacket, additional cores, conductor size |
Request datasheet, custom length, or OEM pricing: sales@rovcable.com -- Shanghai Kabel Intelligence Technology Co., Ltd.
PE (polyethylene) provides excellent moisture resistance and low dielectric constant, which is beneficial for high-frequency signal integrity in RS-485 applications. PUR is more flexible and abrasion-resistant. For static deployments, PE is preferred; for dynamic/tether applications with frequent bending, PUR is the better choice.
RS-485 supports cable runs up to 1,200 m at 100 kbps. At higher baud rates (9,600 baud typical for Modbus), reliable operation is possible to 300--500 m with properly terminated cables. Always add 120-Ohm termination resistors at both ends of the RS-485 bus.
