RIA452
4 Endress+Hauser
Pulse output (open collector) • Frequency range up to 12.5 kHz
•I
max
= 200 mA
•U
max
= 28 V
•U
low/max
= 2 V at 200 mA
• Pulse width = 0.04 up to 2000 ms
• Load min. 1 kΩ
Relay Signal characterisation:
• 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
Galvanic isolation towards all other circuits
!
Note! Assignment
Mixed assignment of low and extra-low voltage circuits is not permitted for neighbouring relays.
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)
• Impedance: ≤ 345 Ω
Approvals:
•ATEX
•FM
•CSA
Transmitter power supply 2, terminal 91/92:
Electrical specifications:
• Output voltage: 24 V ± 15%
• Output current: max. 250 mA (sustained short-circuit proof)
Transmitter power supply 1 and 2
Galvanic isolation:
• Towards all other circuits
HART
®
:
•No HART
®
signal influence
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