KROHNE OPTISWITCH 5100C 2wire EN User Manual
Page 22
The following instrument combinations meet the requirements
acc. to WHG:
OPTISWITCH 5100 C, 5150 C EX with
l
Oscillator SWE60Z EX
l
signal conditioning instrument SU 501 (Ex) or PLC
The following instrument combinations meet the requirements
according to SIL:
OPTISWITCH 5100 C, 5150 C EX
l
Oscillator SW E60Z (EX)
l
signal conditioning instrument SU 501 (Ex)
The recurring test according to WHG and the function test
according to IEC 61508 can be carried out by pushing the test
key on the signal conditioning instrument or by briefly (> 2
seconds) interrupting the cable to the sensor. The correct
sequence of the switching conditions must be monitored via
the two signal lamps on the signal conditioning instrument as
well as the connected systems. The sensor must neither be
removed nor must a response be triggered by filling the vessel.
This applies to OPTISWITCH 5100 C, 5150 C with two-wire
oscillator SW E60Z EX.
If you are subject to the WHG regulations, you can carry out
the function test with the outputted current values also directly
via a PLC or a process control system.
The implementation and switching sequence of the function
test is described also in the operating instructions manual of
the appropriate signal conditioning instrument.
A function test can be carried out for measuring systems in
conjunction with the two-wire oscillator SW E60Z EX. For this
the integration time must be set to 0.5 s. The signal
conditioning instrument has an integrated test key. The test
key is recessed in the front plate of the signal conditioning
instrument. Push the test key for > 2 seconds with a suitable
object (screwdriver, pen, etc.).
For WHG the following is also applicable: If OPTISWITCH
5100 C, 5150 C is connected to a processing system or a PLC,
you have to interrupt the connection cable to the sensor for > 2
seconds.
After releasing the test key or interrupting the connection cable
to the sensor, the complete measuring system can be checked
WHG
SIL
Recurring test and function
test
Test key on the signal con-
ditioning instrument
22
OPTISWITCH 5100 C, 5150 C - with two-wire output
Set up
30430
-EN
-060831