Eddyfi Technologies TSC U41, User Manual

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The Topside Unit
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Introduction to the topside unit
The topside unit provides power and communications between the subsea unit and the
controlling laptop or desktop computer. There are two models: one for use with diver-based
equipment (Topside Unit - D) and one for ROV equipment (Topside Unit - R). Note that the
Topside Unit – R will work with a diver subsea bottle but not vice versa.
The models are similar with the main difference being that the R version supports additional
communications protocols between the Topside Unit and Subsea Unit for use with various ROV
systems. The R version is shown below; the D version is visually similar except it does not include
the additional communications status LEDs.
Figure 3-1
Topside unit
1. Power in connector. Connect the dedicated power cable, with integral RCD, to this
connector by inserting the plug and rotating clockwise until the connector clicks into
place. The plug has a locking mechanism to avoid accidental disconnection in use. To
remove the plug, slide the catch on the barrel to unlock and rotate the plug anti-
clockwise.
2.
Power in Live fuse. 5 x 20mm ceramic cartridge fuse rated for 5A / 250Vac, anti-surge.
3.
110V power present indicator. When there is 110-120Vac on the input connector, this
indicator is lit.
4.
Power in Neutral fuse. 5 x 20mm ceramic cartridge fuse rated for 5A / 250Vac, anti-surge.
5. 110-120Vac power output socket. This is used to power an external laptop charger from
the topside unit. The output connector is of the same family as the input power
connector and works in a similar manner.
6.
Ethernet connection to computer
7.
Unit On/Off latching push switch with illumination when powered on.
8.
Umbilical power Safety Trip Test switch.
9. Umbilical power Safety Trip Fault indicator.
10.
Umbilical power Safety Trip Reset button.
11.
Safe Boot button. To restore operation to a potentially corrupted subsea unit firmware,
hold this button while powering on the topside unit.
12.
Topside to subsea unit comms protocol indicators (R version only). These indicate the
currently set protocol in use between the topside unit and the subsea bottle.
13. Integration cable connector.
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