VideoRay Defender MSS, Руководство оператора

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2 Interlock (Sense) 24 24 28
3 400 VDC + 16 (x2) 20 (x2) 24 (x2)
4 M100 EOP+ 24 28 28
5 Ground 16 (x2) 20 (x2) 24 (x2)
6 M100 EOP- 24 28 28
7 RS-485 A 24 28 28
8 RS-485 B 24 28 28
All conductors are straight through, such that pin 1 in the male connector is connected to socket 1
in the female connector, and so on for all eight pins / sockets.
Conductor pairs 1 & 2, 4 & 6 and 7 & 8 are twisted.
Pins 3 and 5 use 2 conductors each for maximizing power transmission and tether flexibility.
Tether Buoyancy
Performance and Neutral tether includes buoyancy compensating foam that provides near neutral
buoyancy in fresh water. Negative tether contains no foam and will sink. The connectors do not contain
any buoyancy compensation and will sink slightly.
Tether Strength
All tether types include Kevlar that is rated at 450 kg (1,000 pounds), the connectors are rated 80 kg
(175 pounds).
These values are breaking strength. The tether should not be subjected to a working
strength greater than one half of the breaking strength. The ROV and tether are equipped with a strain
relief cable and connectors, which are rated at 136 kilograms (300 pounds). The strain relief cable
should be used to avoid separation of the tether connectors and loss of the ROV.
The maximum usable tether length is limited by the ability of the tether to transmit power and data
signals. The maximum usable tether length of MSS systems is about 550 meters (1,800 feet). MSS
systems can fiber tether to extend the range. See the
Tether Management section of the Operations
Guide for more information.
Kevlar is a registered trademark of E. I. du Pont de Nemours and Company
Tether Strain Relief
The Defender strain relief is used to secure the ROV to the tether to prevent separation and loss of the
vehicle if the tether connection becomes separated. The strain relief also minimized the load on the
tether connector.
There are two different strain relief systems. One is for use between the ROV and tether and the
second is for use when connecting two tethers together. There is not a strain relief system for the
topside connection.
Instructions for using these strain relief systems is found on the following pages.
ROV to Tether Strain Relief
Use the following procedures to install and secure the vehicle to the tether to prevent loss of the
vehicle due to a connection failure. The strain relief cable may already be attached to the tether. If so,
you can skip steps 1 to 3.
Failure to connect the strain relief properly may result in loss of the vehicle.