Endress+Hauser RIA452 - Page 50

Technical data RIA452
50 Endress+Hauser
Load:
• ≤ 600 Ω (current output)
• Max. loop current 22 mA (voltage output)
Signal characterization:
• Signal freely scalable
Galvanic isolation towards all other circuits
10.2.4 Pulse output
• Frequency range to 12.5 kHz
•I
max
= 200 mA
•U
max
= 28 V
•U
low/max
= 2 V at 200 mA
• Pulse width = 0.04 to 2000 ms
10.2.5 Relay
Signal characterization:
• Binary, switches when the limit value is reached
Switch function: limit relay switches for the operating modes:
• Minimum/maximum safety
• Alternating pump control function
•Batch function
•Time control
•Window function
•Gradient
• Device malfunction
• Sensor malfunction
Switching threshold:
• Freely programmable
Hysteresis:
• 0 to 99%
Signal source:
• Analog input signal
•Integrated value
• Digital input
Number:
• 4 in basic unit (can be extended to 8 relays, option)
Electrical specifications:
• Relay type: changeover
• Relay switching capacity: 250 V AC / 30 V DC, 3 A
• Switch cycles: typically 10
5
• Switching frequency: max. 5 Hz
• Minimum switching load: 10 mA / 5 V DC
Galvanic isolation towards all other circuits
10.2.6 Transmitter power supply
Transmitter power supply 1, terminal 81/82 (optionally intrinsically safe):
Electrical specifications:
• Output voltage: 24 V ± 15%
• Output current: max. 22 mA (at U
out
≥ 16 V, sustained short-circuit proof)
Mixed assignment of low and extra-low voltage circuits is not permitted for
neighboring relays.