Cygnus MINI ROV Operation Manual
M4-CYGMINI-TSR-M-ENG_Iss 1
Page 16 of 66
output drivers have ESD protection to ±15 kV. See Serial Data
Format on Page 53.
Electrical connections to the Surface
Connection to a Computer
A single “umbilical” cable can connect the Gauge to the surface,
independent of the ROV craft’s own cabling. See page 63. This has
a maximum length of 1000 metres. This cable can be supplied, on
request, by Cygnus.
As shown on page 10, assemble the data conversion items:
9-way D-connector (on the umbilical cable) to the K3 interface
adapter (at the end marked RS422)
the other end of the K3 (marked RS232) can either connect to a
free RS-232 serial port on your computer or to the Serial-to-
USB adaptor, which can connect to a spare USB port on your
computer.
Connection to the ROV Craft
In this method the connection from the Gauge is taken to the ROV
craft itself and is merged with the ROV’s own cabling to connect to
the surface. See pages 64 and 65.
Power for the Gauge can be taken from the ROV’s own power
supply, if suitable.
It is essential that the data connections from the Gauge are
maintained throughout as twisted-pair.
If the distance from the Gauge to the surface
is greater than
1000 metres
the Data-output from the Gauge must be
electronically buffered within the ROV.
Custom Connection
If you intend to convert the serial data sent from the Cygnus MINI
ROV Gauge using
your own electronics
: the TX+ / TX- data-pair
may be connected directly to any RS-422 compatible receiving
equipment.
Custom Display Software
For Users who wish to develop
their own display software
: the
format of the data sent from the Gauge is detailed in Serial Data
Format, page 53.
