3.10 Analogue voltage/current input
Category SGC 421 specifications
Controller terminal
21 (Aux3)
23 (Aux4)
Measurement type Analogue voltage/current sensing
Range
0 to 5 V DC
4 to 20 mA
Accuracy ±1.25 % of full scale
For genset paralleling application, configure input Aux4 on terminal 23 to accept a 0 to 5 V DC speed bias signal generated by a
LSM (Load Sharing Module).
3.11 Site battery inputs
Category
Specifications
Controller terminals 24, 25
Number of inputs 2
Type Differential
Range ±60 V
Resolution 0.1 V
Accuracy ±2 % of full scale
Site battery run hours
In this feature, controller calculates the run hours for which the site runs on the battery backup. Site battery run hours are
incremented only when both the mains and genset contactors are not latched and when site battery voltage is greater than low
battery voltage threshold.
3.12 Magnetic pick-up (MPU) input
Category
Specifications
Controller terminal 22
Measurement type Single ended
Frequency range 10 to 10 kHz
Input voltage range 200 mV to 45 V AC RMS
The Magnetic pick-up (MPU) is an inductive sensor fitted on the engine flywheel for the engine speed sensing. The output of the
MPU is a sine-wave signal.
USER MANUAL 4189341227A UK Page 12 of 86
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