Possible Scenarios Regarding The System Failure Of The Abl System - Bavaria VIRTESS 420 Owner's Manual

7.5. Possible scenarios regarding the system failure of the ABL system.

Two different failure modes of the Touchscreen BUS System are described here:
7.5.1. Complete failure of the RS485 BUS
On each module (seen below) a 15 Amp slot serves as a backup and may be used independently of the RS485-Bus.
One of the fuses may be moved manually to supply this circuit independently and permanently while overriding the
RS485 BUS: The backup Fuse is highlighted with the red ellipse in the below diagram.
7.5.2. Failure of the touch-sensitive Display
In this case all relays stay switched and connected as before the failure occurred. The relays will only be disabled if
the voltage on the system (RS 485 BUS) is being switched off.
7.5.3. The DC system consists of the following circuits/consumers:
Pos. Description
16 Analog box
17 Digital box
18 Main switch bow thruster, anchor windlass (manual) (Option)
19 Main switch Consumer (remote control, receiver) (Battery disconnect switch)
20 Main switch engine 1 and 2 (remote control, receiver) (Battery disconnect switch)
21 Main switch Gangway, aft platform, stern windlass (Stern anchor) windlass (remote control, receiver) (Bat-
tery disconnect switch) (Option)
22 Batteries (Consumer, engine; partly optional)
23 Cockpit panel Helm stand (Deck)
22
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