The power unit contains redundant power converters, each converter dimensioned for 100% load. At least
one of the two incoming supplies must be connected to a UPS. The power unit supplies the equipment on
the engine with 2 x 24 VDC and 2 x 110 VDC.
Power supply from ship's system:
• Supply 1: 230 VAC / abt. 1500 W
• Supply 2: 230 VAC / abt. 1500 W
14.1.5 Cabling and system overview
Figure 14.3 UNIC C3 overview
Table 14.1 Typical amount of cables
Cable types (typical)From <=> ToCable
3 x 2 x 0.75 mm
2
1 x Ethernet CAT 5
Engine <=> Integrated Automation SystemA
1 x 2 x 0.75 mm
2
1 x 2 x 0.75 mm
2
1 x 2 x 0.75 mm
2
14 x 0.75 mm
2
14 x 0.75 mm
2
Engine <=> Propulsion Control System
Engine <=> Power Management System / Main Switchboard
B
2 x 0.75 mm
2
Power unit <=> Integrated Automation SystemC
2 x 2.5 mm
2
(power supply)
2 x 2.5 mm
2
(power supply)
Engine <=> Power UnitD
4 x 2 x 0.75 mm
2
2 x 2 x 0.75 mm
2
3 x 2 x 0.75 mm
2
1 x Ethernet CAT5
Engine <=> Gas Valve UnitE
3 x 2 x 0.75 mm
2
2 x 5 x 0.75 mm
2
Gas Valve Unit <=> Exhaust gas fan and pre-lube starterF
2 x 2 x 0.75 mm
2
1 x Ethernet CAT5
Gas Valve Unit <=> Integrated Automation SystemG
1 x 2 x 0.75 mm
2
Gas Valve Unit <=> Gas detection systemH
Product Guide Wärtsilä 34DF - 3/2012 117
Product Guide
14. Automation System
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