Published on:2026-05-24 Click:27
6 power + 5 RS485 data cable negative buoyant ROV tether. Dense PUR for seabed-lying ROV with 6 power channels and 5 RS-485 data pairs that sinks at depth.
The 6-power + 5-RS485 negative buoyant ROV tether is a complex seabed-lying tether for large ROV systems requiring six power supply channels and five independent RS-485 data buses. The dense solid PUR jacket (non-foamed) gives the cable negative buoyancy, keeping it on the seabed during long-range ROV traverses. Five independent RS-485 channels support multiple Modbus device buses (thruster controllers, sensor modules, manipulator controllers) without data bus contention.
| Parameter | Specification |
|---|---|
| Power Cores | 6 x stranded tinned copper (CSA per spec) |
| RS-485 Pairs | 5 x twisted pairs (shielded, 24AWG) |
| Total Conductors | 6 power + 10 RS-485 = 16 |
| Jacket | Dense solid PUR (negative buoyancy) |
| Buoyancy | Negative (sinks in seawater) |
| RS-485 Channels | 5 independent Modbus buses |
| Custom | Core CSA, jacket density, armour, length |
Request datasheet, custom length, or OEM pricing: sales@rovcable.com -- Shanghai Kabel Intelligence Technology Co., Ltd.
RS-485 Modbus RTU is a shared bus limited to one master and multiple slaves per segment. Large ROV systems with many independent subsystems avoid bus contention by using multiple physically separate RS-485 buses: Bus 1 -- horizontal thrusters; Bus 2 -- vertical thrusters; Bus 3 -- gripper/manipulator; Bus 4 -- sensor array (depth, temp, compass); Bus 5 -- payload or camera pan/tilt. Independent buses prevent any one subsystem from blocking or delaying communication with others.
Yes, with proper shielding. Each RS-485 pair must be individually shielded (foil + drain) to prevent power switching noise from the thruster power conductors from coupling into the differential RS-485 signal. The shield must be earthed at one end only (single-point earth) to prevent earth loop currents. With proper shielding, RS-485 at 115,200 baud can reliably operate in the same cable as 48V DC thruster supply.
