
4 – Electrical Installation
DPN 402197 © TSS (International) Ltd Page 5 of 18
On the other end cap:
❐ Power input and communications link
❐ Altimeter connection
❐ Connection for a TSS attitude sensor. The current version of 350 software does
not support this facility. DO NOT remove the blanking plug from this port.
❐ Auxiliary input connection (for use when you use the 350 System in a Dualtrack
installation). Refer to Appendix B for appropriate instructions.
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
TSS to protect any unused port on the SEP.
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 corro-
sion. Follow the instructions in sub-section 4.1.2 to clean and care for the connectors.
Tighten the connector locking collars by hand only – do not over tighten these con-
nectors.
4.1.3.1 Power Requirement
The standard SEP requires an AC electrical supply in the range 110V to 120V (45 to
65Hz) to operate. The maximum current drawn from the supply is 0.3A for a stand-
alone 350 System, or 3.1A if the System is part of a TSS Dualtrack installation.
Optionally, you may request an SEP that operates from an AC electrical supply in the
range 220V to 240V (45 to 65Hz). This type of SEP draws a maximum supply current
of 0.1A for a stand-alone 350 System or 1.8A when the System is part of a TSS Dual-
track installation. Contact TSS if you require a 350 System that operates from the
nominal 240V electrical supply.
WARNING
Protection provided by the equipment might be impaired if you attempt to operate it
from an incorrect supply voltage. Operate the SEP only from an electrical supply of the
correct rating.
WARNING
The supply connector is a safety feature that allows the System to be isolated easily
from the electrical supply. Hand tighten the power connection only. Position the con-
nector to allow easy access for disconnection.
The SEP ‘Power/Comms’ port accepts the AC electrical supply from the ROV and
passes the bi-directional communications between the SEP and the SDC. All electri-
cal and communication connections to the SEP are through the Power and Communi-
cations cable, or ‘ROV tail’. Table 4–1 lists the pins of the connector on the Power
and Communications cable, together with the relevant core colours. Refer to this
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