21
6 Setup
VEGAVIB 63 • NAMUR
31217-EN-170315
Level
Signal current - Sensor Control lamp
Rising characteristics min.
≥ 2.2 mA
Rising characteristics min.
≤ 1.0 mA
Fault
any
≤ 1.0 mA
flashes
6.4 Proof test
According to IEC 61508.
The VEGAVIB 63 is qualified for use in measuring chains of level SIL2
according to IEC 61508 (redundant, level SIL3).
The following instrument combinations meet the requirements ac-
cording to SIL:
VEGAVIB 63
•
Oscillator VB60N
The proof test according to IEC 61508 can be carried out by pushing
the simulation key on the electronics module or by briefly (> 2 sec-
onds) interrupting the cable to the sensor. The correct sequence of
the switching conditions must be monitored via the switching ampli-
fier as well as the connected systems. The sensor must neither be
removed nor response must be triggered by filling the vessel. This
applies to VEGAVIB 63 with NAMUR electronics module VB60N.
You can carry out the function test with the outputted current values
also directly via a safety PLC or a process control system.
A function test can be carried out for measurement setups in conjunc-
tion with the NAMUR electronics module VB60N. For this purpose,
the switching delay must be set to 0.5 s. VEGAVIB 63 has an inte-
grated simulation key. The simulation key is lowered on the electronics
module. Push the simulation key for > 2 seconds.
If VEGAVIB 63 is connected to an SPLC, you have to interrupt the
connection cable to the sensor for > 2 seconds.
After releasing the simulation key or briefly interrupting the connection
cable to the sensor, you can check the complete measuring system
on correct function. A switching procedure is simulated during the
test.
SIL
Proof test
Simulation key on the
electronics module
