Teledyne 440, System Manual, Page: 51 / 256

4 – Electrical Installation
DPN 402196 Issue 4.1 © Teledyne TSS 4- 5
4.1.4 Sub-sea Electronics Pod
CAUTION
Water could enter the SEP through any port that does not have a connector fitted.
To avoid damage from water ingress, you must fit the correct blanking plug
supplied by Teledyne TSS to protect any unused port on the SEP.
The SEP has six ports that allow connection to the various sub-sea components of the installation.
On one end cap:
❐
Connection ports for coil channels 1 to 4. A label identifies the four coil channels. The 440 Sys-
tem uses only three channels during a survey. You
must ensure the unused port has a blank-
ing plug fitted to protect it during sub-sea operations.
On the other end cap:
❐
Connection port for the 12-core cable from the PSU
❐
Altimeter connection
Before you assemble any electrical couplings in the sub-sea installation, inspect the pins and
receptacles of all connectors for signs of damage, contamination or corrosion. Follow the instructions
in
section 4.1.2 "Care of Sub-sea Connectors" on page 4-3 to clean and care for the connectors.
Tighten the connector locking collars by hand only – do not overtighten these connectors .
4.1.5 Search-coils
CAUTION
You must fit a blanking plug to the unused channel on the SEP. The System
includes four of these plugs and further can be obtained if required (Teledyne
TSS P/N 202207).
If you do not fit this blanking plug, rapid corrosion of the port will occur and the port
will fail. Sea water will then enter the SEP through the corroded port to cause total
failure of the SEP.
You must use one of the cables supplied with the System to connect each search-coil to its correct
channel on the SEP. The cables have a waterproof connector fitted to each end.
NOTE
Route the cables from the coils to the SEP by securing them along the ROV body
using plastic cable clips. Avoid introducing any sharp bends or other points of