Connecting The Electronic Insert Fei57S (Pfm) - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Liquicap M FTI51, FTI52
Endress+Hauser
4.11

Connecting the electronic insert FEI57S (PFM)

The two-wire DC connection is used in conjunction with one of the following Nivotester switching
devices from Endress+Hauser:
• FTC325 PFM,
• FTC625 PFM (from SW V1.4),
• FTC470Z,
• FTC471Z
The PFM signal is between 17 and 185 Hz.
The changeover of failsafe mode (MIN) / (MAX) and the level limit calibration take place on the
Nivotester.
Power supply
Supply voltage: 9.5 to 12.5 V DC
Power consumption: < 150 mW
Reverse polarity protection: yes
Separation voltage: 0.5 kV
Output signal
PFM 17 to 185 Hz (Endress+Hauser)
Connectable load
• Floating relay contacts in the connected switching unit Nivotester FTC325 PFM,
FTC625 PFM (from SW V1.4), FTC470Z, FTC471Z
• For the contact load capacity, refer to the technical data of the switching device.
Connect the FEI57 (PFM) as follows:
1. Make the connection as shown in the graphic.
2. Turn the cable gland until tight.
!
Note!
Do not switch on the supply voltage until you have
familiarized yourself with the device functions as
described on Page 53 "Operation". This will ensure
that you do not accidentally trigger any processes by
switching on the supply voltage.
3. Switch on the supply voltage.
PFM PFM
16 mA 16 mA
8 mA 8 mA
0 mA 0 mA
Frequency: 17 to 185 Hz
1 2
EEx ia
PFM
– +
11 12
d4 d2
Wiring
t t
TI418F52
FEI57S
E X
E X
Nivotester
FTC325
FTC625
FTC470Z
FTC471Z
TI418F53
51