Published on:2026-05-24 Click:27
2x2.0mm2 power + 1x2x24AWG signal + 2 SM fiber buoyant tether. Foamed PUR for ROV tether combining power, signal pair, and dual single-mode fiber in one buoyant cable.
The 2x2.0mm² + 24AWG + 2-SM-fiber buoyant tether is a three-function composite tether: two 2.0mm² conductors (~20A each) supply the ROV; one shielded 24AWG pair provides a RS-485 or analog control channel; and two OS2 single-mode fibers carry high-bandwidth IP video and data at 10 Gbps+. This three-function design is common in mid-class inspection ROVs transitioning from copper-only tethers to fiber-based video systems. The foamed polyurethane (PUR) jacket uses a micro-cellular expanded jacket compound with a bulk density lower than seawater (~1.025 g/cm³), giving the cable near-zero or positive net buoyancy. This eliminates tether sag and reduces drag force on the ROV, improving vehicle manoeuvrability and reducing tether management workload during subsea operations.
| Parameter | Specification |
|---|---|
| Power Cores | 2 x 2.0 mm² tinned copper (~20A each) |
| Signal Pair | 1 x 2 x 24AWG shielded twisted pair |
| Fiber | 2 x SM OS2 (9/125 μm) |
| Jacket | Foamed micro-cellular PUR |
| Buoyancy | Near-neutral |
| Fiber Bandwidth | 10 Gbps+ per fiber |
| Custom | Power CSA, pair count, fiber count, Kevlar, length |
Request datasheet, custom length, or OEM pricing: sales@rovcable.com -- Shanghai Kabel Intelligence Technology Co., Ltd.
The jacket is manufactured from a micro-cellular expanded (foamed) polyurethane compound. During extrusion, a controlled foaming agent creates millions of tiny closed-cell air pockets within the jacket wall. These air cells reduce the bulk density of the jacket below that of seawater (~1.025 g/cm³), producing positive or neutral net buoyancy. The jacket retains all the abrasion resistance, oil resistance, and flexibility of standard PUR while achieving the buoyancy needed for ROV tether applications.
The RS-485 pair is retained as a fail-safe control channel. If the fiber optic transceivers fail, the operator can fall back to RS-485 low-bandwidth control (propulsion commands, emergency surfacing) to retrieve the ROV safely. The RS-485 link operates completely independently of the fiber, providing hardware redundancy for safety-critical vehicle control.
