VEGA VEGAVIB 62 - NAMUR User Manual
Page 22
Sensor cur-
rent
Level relay
amplifier -
overflow
protection
Level relay
amplifier -
dry run pro-
tection
Signal lamp
amplifier -
overflow
protection
Signal lamp
amplifier -
dry run pro-
tection
Signal lamp
- sensor
1. Low Current
(approx. 3 s)
approx. 1 mA energized
currentless
2. High Current
(approx. 1.5 s)
approx.
2.2 mA
currentless
energized
3. Return to the actual
operating condition
Note:
When used in measuring chains according to IEC 61508, mode B (dry
run protection) is not permitted.
You can carry out the function test with the stated current values also
directly with a safety PLC or a process control system.
Test passed
l
Low Current ≥ 2 s
l
High Current ≥ 1 s
Test not passed
l
Low Current < 2 s / > 4 s
l
High Current < 1 s / > 2 s
Test assessment (SPLC)
22
VEGAVIB
62 • - NAMUR
6 Set up
31216
-EN
-120418