Fel68 Switching Behavior And Signaling; Functional Test Of The Electronic Switch With A Test Magnet; Switching On The Device - Endress+Hauser Liquiphant FTL63 Operating Instructions Manual

Liquiphant FTL63
Endress+Hauser
8.2.5

FEL68 switching behavior and signaling

MAX
MIN
RD GN
1.
>1 s
2.
3.
 42 NAMUR electronics switching behavior and signaling
A After the test button is pressed, the current is 0.4 to 1 mA for at least 10 s even if the button is pressed for
< 10 s. If the test button is pressed for > 10 s, the current remains at 0.4 to 1 mA until the test button is
released. The current is then 2.2 to 3.8 mA again afterwards.
8.3 Functional test of the electronic switch with a test
magnet
Perform functional test of the electronic switch without opening the device:
‣
Hold the test magnet against the marking on the nameplate on the outside.
 Simulation is possible in the case of the FEL62, FEL64, FEL64DC, FEL68 electronic
inserts.
The functional test with the test magnet acts in the same way as the functional test using
the test button on the electronic insert.
 43 Functional test with test magnet
8.4

Switching on the device

During the power-up time, the device output is in the safety-oriented state, or in the alarm
state if available:
• For electronic insert FEL61, the output will be in the correct state after a maximum of
4 sfollowing power-up.
• For electronic inserts FEL62, FEL64, FEL64DC, the output will be in the correct state
after a maximum of 3 s following power-up.
• For electronic inserts FEL68 NAMUR and FEL67 PFM, a functional test is always
performed upon power-up. The output will be in the correct state after a maximum of
10 s.
YE
2.2 ... 3.8 mA
L+ 2 1
0.4 ... 1 mA
L+ 2 1
A
L+ 2 1
Commissioning
RD GN YE
0.4 ... 1 mA
L+ 2
0.4 ... 1 mA
L+ 2
0.4 ... 1 mA
L+ 2
1
1
1
A0033543
A0033419
41