Technical Data - Endress+Hauser RTA421 Mode D'emploi

Contactor

9. Technical data

General details
Unit function
Application area
Contactor
Operation and
Measurement
system
principle
construction
Measurement
system
Number
Input
Type
Measurement
range
Resolution
Over range
Integration time
Output
Output signal
(Loop power
supply)
Number
Galvan.
isolation
Output signal
Output (relays)
Number
Contact type
Contact load
Accuracy
Voltage
Current
42
Alarm set point switch with loop power supply. Used
for monitoring either current or voltage signals
The unit monitors the input signal and checks if it is
within the preset alarm set points. The two built-in
relays switch if the signal wanders either above or
below the preset alarm set point values. A built-in
loop power supply can be used to power connected
sensors.
The analogue signal connected to the input is
digitalised, analysed and shown in the display. When
the preset alarm set point is reached one of the two
relays is independently switched.
icro-controlled measurement system with LC display,
analogue input, alarm set points and loop power
supply.
1
Voltage and current
Voltage: 0/2...10 V,
Ri: 1 MOhm
Current: 0/4...20 mA;
Ri: 5 Ohm
Voltage: 41 mV, 8 Bit
Current: 83 µA, 8 Bit
10%
4/s
Terminals 81: 24 V +/- 20 %, 30 mA
1
Between power supply and relay outputs
Binary, switches when alarm set point is reached
2
1 potential free change over contact per relay
<= 250 VAC, 8(2) A / 30 VDC, 5(2) A
Accuracy: 1 % FSD
Temperature drift: 0.02 % / K ambient temperature
Accuracy: 1 % FSD
Temperature drift: 0.02 % / K ambient temperature
max. voltage 50 V
max. current 150 mA