Product Manual

5. Engine shuthown detection
The engine shutdown detection mechanism simplifies your ORION-Tr DC-DC Charger system by detecting if the engine is
running without wiring additional switches or sensors. The factory default setting will work with most regular and smart alternators
but can be re-configured with the VictronConnect App.
Configuring the engine shutdown detection depends on the voltage generated by the alternator when the engine is running.
Regular alternators will generate a fixed voltage (e.g. 14V) where smart alternators generate a variable output voltage which can
range from 12.5V to 15V. Especially smart alternators in a regenerative braking system show large alternator voltage variations.
Engine shutdown detection is only active in charger mode. The feature can be disabled by the “engine shutdown detection
override” and in VictronConnect as shown in figure 5. In power supply mode the “input voltage lock-out” determines when the
output is active.
The engine shutdown detection is updated from software version v1.05 onwards.
5.1. Engine shutdown detection sequence
Figure 8: Engine shutdown detection sequence
0 → 1: If the engine runs the alternator voltage will ramp-up, when V
starter
> V
start
, charging is enabled.
1 → 2: The input current produces a voltage across the input cable (V
cable
); this voltage reduces the voltage measured by the
charger (V
IN
). If V
IN
> V
shutdown
the charger will operate at I
max
.
2 → 3: If V
IN
≤ V
shutdown
, the charge current will be reduced to prevent V
IN
to drop below V
shutdown
.
3 → 4: If V
IN
< V
shutdown
for longer than 1min (t
shutdown
) “engine off” is detected and charging is disabled. If V
IN
> V
shutdown
before
t
shutdown
runs out, charging remains enabled.
4 → 5: If V
start(delay)
< V
IN
< V
start
charging is enabled after t
start delay
(configurable).
5.2. Engine shutdown detection setup with VictronConnect
Open VictronConnect and press the Cog symbol to enter the settings.
Orion-Tr Smart DC-DC Charger Non-Isolated
Page 9 Engine shuthown detection