Wartsila 31, Product Manual

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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 automation system on the engine with 24 VDC and 110 VDC.
Power supply from ship's system:
●
Supply 1: 230 VAC / abt. 750 W
●
Supply 2: 230 VAC / abt. 750 W
13.1.6 Ethernet communication unit
Ethernet switch and firewall/router are installed in a steel sheet cabinet for bulkhead mounting,
protection class IP44.
13.1.7 Cabling and system overview
Fig 13-2 UNIC overview
Table 13-1 Typical amount of cables
Cable types (typical) From <=> To Cable
2 x 4 mm 2 (power supply) *
2 x 4 mm
2
(power supply) *
2 x 4 mm 2 (power supply) *
2 x 4 mm
2
(power supply) *
2 x 4 mm 2 (power supply) *
2 x 4 mm
2
(power supply) *
2 x 4 mm 2 (power supply) *
2 x 4 mm
2
(power supply) *
Engine <=> Power Unit A
2 x 2.5 mm
2
(power supply) * Power unit => Communication interface unit B
Wärtsilä 31 Product Guide - a1 - 18 October 2016 13-3
13. Automation System Wärtsilä 31 Product Guide