UMG 804 www.janitza.com
14
Voltage measurement
The voltage measurement inputs are suitable for measurements in the following power supply systems
Three-phase 4-conductor systems with nominal
voltages up to
480 V AC
Three-phase 3-conductor systems, unearthed,
with nominal voltages up to
277 V AC
From a safety and reliability perspective, the voltage measurement inputs are designed as follows
Overvoltage category 230 V: Cat II 24 V: CAT III
Protection of voltage measurement Impedance limited plus clamping diodes / MOV
Measurement range L-N 0 .. 277 V AC
Measurement range L-L 0 .. 480 V AC
Resolution 0.01 V AC
Crest factor 1.9 @ 240 V AC
Impedance 2.5 MΩ
Power consumption <0.1 A @ 277 V AC (< 3 W)
Sampling rate 40 kHz
Frequency range of the fundamental oscillation
- Resolution
40 .. 70 Hz.
Digital inputs
Quantity 2
Digital outputs
Quantity 2
Switching voltage 30 V DC
Switching current 100 mA
Cable lenght screw in terminal block
Note: two inputs for dry contacts
Terminal connection capacity (digital inputs and outputs)
Rigid/flexible 22-16 AWG / 0.324-1.31 mm²
Flexible with core end sheath without plastic sleeve 22-16 AWG / 0.324-1.31 mm²
Flexible with core end sheath with plastic sleeve 22-16 AWG / 0.324-1.31 mm²
Tightening torque 5.0 Lb-In / 0.56 Nm
Stripping length 5 mm (0.20 in) recommeded
Current measurement on modules
Rated current 0 .. 600 A (external current transducer dependant)
Resolution 0.01 A
Crest factor 3.75 @ 100 % of 0.333 V signal
Overload for 1 s 200 %
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