RIA452
Endress+Hauser 3
Input
Measured variable Current (standard)
Digital inputs (standard)
Current/voltage, resistance, resistance thermometer, thermocouples (universal input option)
Measuring ranges Current input:
• 0/4...20 mA +10% overrange, 0...5 mA
• Short-circuit current: max. 150 mA
• Input impedance: ≤ 5 Ω
• Reaction time: ≤ 100 ms
Universal input:
Current:
• 0/4...20 mA +10% overrange, 0...5 mA
• Short-circuit current: max. 100 mA
• Input impedance: ≤ 50 Ω
Voltage:
• ±150 mV, ±1 V, ±10 V, ±30 V, 0...100 mV, 0...200 mV, 0...1 V, 0...10 V
• Input impedance: ≥ 100 kΩ
Resistance:
• 30...3,000 Ω in 3-wire/4-wire technology
Resistance thermometer:
• Pt100/Pt100/500/1000, Cu50/100, Pt50 in 3-wire/4-wire technology
• Measuring current for Pt100/500/1000 = 250 µA
Thermocouple types:
• J, K, T, N, B, S, R as per IEC584
• D, C as per ASTME998
• U, L as per DIN43710/GOST
• Reaction time: ≤ 100 ms
Digital input:
• Voltage level -3...5 V low, 12...30 V high (as per DIN19240)
• Input voltage max. 34.5 V
• Input current typ. 3 mA with overload and reverse polarity protection
• Sampling frequency max. 10 Hz
Galvanic isolation Towards all other circuits
Output
Output signal Relay, transmitter power supply (standard)
Current, voltage, pulse, intrinsically safe transmitter power supply (option)
Signal on alarm No measured value visible on the LC display, no background illumination, no sensor power supply, no output
signals, relays behave in fail safe manner.
Current/voltage output Span:
• 0/4...20 mA (active), 0...10 V (active)
Load:
• ≤ 600 Ω (current output)
• Max. loop current 22 mA (voltage output)
Signal characterisation:
• Signal freely scalable
Galvanic isolation towards all other circuits
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