Connecting The Electronic Insert Fei58 (Namur) - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Wiring
!
36
4.9

Connecting the electronic insert FEI58 (NAMUR)

The two-wire connection for a separate switching unit in accordance with NAMUR
specifications (IEC 60947-5-6), e.g. FXN421, FXN422, FTL325N, FTL375N from
Endress+Hauser.
Change in output signal from high to low current in event of point level detection.
(H-L edge)
Additional function:
Test key on the electronic insert.
Pressing the key breaks the connection to the isolating amplifier.
Note!
In the case of Ex-d operation, the additional function can only be used if the housing is not
exposed to an explosive atmosphere.
When connecting to Multiplexer: set 3 s as the cycle time at least.
Power supply
Power consumption: < 6 mW at I < 1 mA; < 38 mW at I = 2.2 to 4 mA
Interface connection data: IEC 60947-5-6
Signal on alarm
Output signal in the event of damage to the sensor: < 1.0 mA
Connectable load
• See the technical data of the connected isolating amplifier as per IEC 60947-5-6
(NAMUR)
• Connection also to isolating amplifiers which have special safety circuits (I > 3.0 mA)
Connect the FEI58 (NAMUR) as follows:
1. Make the connection as shown in the
graphic.
2. Tighten the cable gland.
!
Note!
Do not switch on the supply voltage until you
have familiarized yourself with the device
functions as described on Seite 38 "Operation".
This will ensure that you do not accidentally
trigger any processes by switching on the supply
voltage.
3. Switch on the supply voltage.
Liquicap M FTI51, FTI52
1 2
EEx ia
H
I
L
– +
Isolating amplifier
to IEC 60947-5-6
(NAMUR)
E X
E X
L00-FTL5xxxx-04-05-xx-en-002
Endress+Hauser