Wartsila 31 Product Manual page 127

Wärtsilä 31 Product Guide
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
Table 13-1
Cable
A
B
Wärtsilä 31 Product Guide - a1 - 18 October 2016
UNIC overview
Typical amount of cables
From <=> To
Engine <=> Power Unit
Power unit => Communication interface unit
13. Automation System
Cable types (typical)
2
2 x 4 mm (power supply) *
2 x 4 mm 2 (power supply) *
2
2 x 4 mm (power supply) *
2
2 x 4 mm (power supply) *
2
2 x 4 mm (power supply) *
2
2 x 4 mm (power supply) *
2 x 4 mm 2 (power supply) *
2
2 x 4 mm (power supply) *
2
2 x 2.5 mm (power supply) *
13-3