Specification
7
3.1 POWER SUPPLY REQUIREMENTS
Minimum supply voltage
8V continuous, 5V for up to one minute.
Cranking dropouts
Able to survive 0V for 50mS providing the supply was at least 10V
before the dropout and recovers to 5V afterwards.
Maximum supply voltage
35V continuous (60V protection for one minute)
Reverse polarity protection
-35V continuous
Maximum operating current
Auto mode will all inputs active and all
LEDs illuminated
292mA at 12V, 167mA at 24V
Maximum standby current
(Stop mode with no active inputs)
101mA at 12V, 66mA at 24V
Plant supply instrumentation display
Range
0V-35V DC (note Maximum continuous operating voltage of 35V DC)
Resolution
0.1V
Accuracy
1% of full scale
3.2 TERMINAL SPECIFICATION
Connection type
Screw terminal, rising clamp, no internal spring
Min cable size
0.5mm² (AWG 24)
Max cable size
2.5mm² (AWG 10)
3.3 S1 /S2 VOLTAGE / FREQUENCY SENSING
Measurement type
True RMS conversion
Sample Rate
5KHz or better
Harmonics
Up to 11
th
or better
Input Impedance
300K
Ω
ph-N
Phase to Neutral
15V
(minimum required for sensing frequency
)
to 333V AC
(absolute maximum)
Suitable for 110V to 277V nominal
(±20% for under/overvoltage detection)
Phase to Phase
26V
(minimum required for sensing frequency
)
to 576V AC
(absolute maximum)
Suitable for 190V ph-ph to 479V ph-ph nominal
(±20% for under/overvoltage detection)
Common mode offset
from Earth
100V AC (max)
Resolution
1V AC phase to neutral
2V AC phase to phase
Accuracy
±1% of full scale phase to neutral
±2% of full scale phase to phase
Minimum frequency
3.5Hz
Maximum frequency
75.0Hz
Frequency resolution
0.1Hz
Frequency accuracy
±0.2Hz