2.6 GENERATOR VOLTAGE & FREQUENCY SENSING
15 V (minimum required for sensing frequency) to
333 V AC (absolute maximum)
Suitable for 230 V nominal (±20 % for under/overvoltage detection)
Common Mode Offset From
Earth
±1 % of full scale phase to neutral
2.7 INPUTS
2.7.1 DIGITAL INPUTS
6 configurable digital inputs
Contact between terminal and Power Supply negative terminal.
40 % with respect to Power Supply positive terminal.
60 % with respect to Power Supply positive terminal.
+60 V DC with respect to Power Supply negative terminal.
-35 V DC with respect to Power Supply negative terminal.
Power Supply positive voltage
2.7.2 CHARGER ALTERNATOR FAIL
The charge fail input is a combined input and output. Whenever the generator is required to run, the
terminal provides excitation current to the charge alternator field winding.
When the charge alternator is correctly charging the battery, the voltage of the terminal is close to the
plant battery supply voltage. In a failed charge situation, the voltage of this terminal is pulled down to
a low voltage. It is this drop in voltage that triggers the charge failure alarm. The level at which this
operates and whether this triggers a warning or shutdown alarm is configurable using the DSE
Configuration Suite Software.
±1 % of max measured voltage
Active circuit constant power output
2.5 W ±10% nominal at 12 V and 24 V