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NT538
TECHNICAL SPECIFICATIONS
NT538 BASIC NT538 AD
POWER SUPPLY
Supply rated values
24-240 Vac-Vdc
50/60HZ
24-240 Vac-Vdc
50/60HZ
Maximum and minimum supply values
20-270 Vac-Vdc
50/60HZ
20-270 Vac-Vdc
50/60HZ
Vdc with reversible polarities
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INPUTS
8 inputs for RTD sensors, Pt100 type with 3 wires (max section 1.5mm²)
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Connections on removable terminal strips
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Input channels protected against electromagnetic interference
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Cable compensation for thermistors
500 m (1 mm²)
500 m (1 mm²)
OUTPUTS
2 alarm relays (ALARM AND TRIP) SPDT
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1 sensor or operating failure (FAULT) relay SPST
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Output relays with 10A-250Vac-res COSФ=1 contacts.
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2 ventilation management relays SPST FAN 1 AND FAN 2
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Modbus RTU RS485 output
NO
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Optically isolated 4.20 mA output
NO
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DIMENSIONS
100x100 mm– din43700-depth 131mm (terminal block included)
Hole 92 x 92 mm
Hole 92 x 92 mm
TESTS AND PERFORMANCE
Construction in compliance with CE regulations
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Protection from electrical interference EN 61000-4-4
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Dielectric strength 1500 Vac for a min. between output relays
and sensors, relays and power supply, power supply and sensors
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Accuracy ±1% full scale value, ±1 digit
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Ambient operating temperature from –20°C to +60°C
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Humidity 90% non-condensing
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