WÄRTSILÄ WARTSILA 26, 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 equipment on the engine with 2 x 24 VDC.
Power supply from ship's system:
●
Supply 1: 230 VAC / abt. 250 W
●
Supply 2: 24 VDC / abt. 250 W
14.1.4 Ethernet communication unit
Ethernet switch and firewall/router are installed in a steel sheet cabinet for bulkhead mounting,
protection class IP44.
14.1.5 Cabling and system overview
Fig 14-3 UNIC C2 overview
Table 14-1 Typical amount of cables
Cable types (typical) From <=> To Cable
2 x 2.5 mm 2 (power supply) *
2 x 2.5 mm
2
(power supply) *
Engine <=> Power Unit A
2 x 2.5 mm
2
(power supply) * Power unit => Communication interface unit B
1 x 2 x 0.75 mm
2
1 x 2 x 0.75 mm 2
1 x 2 x 0.75 mm
2
24 x 0.75 mm 2
24 x 0.75 mm
2
Engine <=> Propulsion Control System
Engine <=> Power Management System / Main Switch-
board C
2 x 0.75 mm
2
Power unit <=> Integrated Automation System D
3 x 2 x 0.75 mm
2
Engine <=> Integrated Automation System E
1 x Ethernet CAT 5 Engine => Communication interface unit F
1 x Ethernet CAT 5 Communication interface unit => Integrated automation
system G
1 x Ethernet CAT 5 Gas valve unit => Communication interface unit H
14-4 Wärtsilä 26 Product Guide - a9 - 7 September 2016
Wärtsilä 26 Product Guide 14. Automation System