Pepperl Fuchs KFA5-ER-1.5 Data Sheet

Conductivity Switch Amplifier

KFA5-ER-1.5

Features

• 1-channel signal conditioner

• 115 V AC supply

• Level sensing input

• Adjustable range 1 kΩ ... 30 kΩ

• Relay contact output

• Minimum/maximum control

Function

This signal conditioner provides the AC measuring voltage for
the level-sensing electrodes.

Once the measured medium reaches the electrodes, the unit
reacts by energizing a form C changeover relay contact.

The module is voltage and temperature stabilized and
guarantees defined switching characteristics. An electronic
holding circuit is used that allows minimum/maximum control.
Since the conductance of the media may vary, the relay
response sensitivity is adjustable.

The normal output state can be reversed through the mode of
operation switch S1.

Assembly

Front view

LED yellow:
Relay output

Potentiometer
Response sensitivity

3

1

2
5

6

4

KFA5-ER-1.5

OUT PWR

S1 III

SENSITIVITY

9107118

12

Removable terminal
green

LED green:
Power supply

Switch S1
Mode of operation

Removable terminals
green

Connection

100 %

0 %

Release date 2012-09-26 14:51 Date of issue 2015-02-16 096047_eng.xml

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

Pepperl+Fuchs Group

KFA5-ER-1.5

2

3

1

7
8
9

11
12

115 V AC

1

Technical data KFA5-ER-1.5

General specifications

Signal type Digital Input

Supply

Connection terminals 11 (L1), 12 (N)

Rated voltage U

Power consumption approx. 0.8 W

Input

Connection terminals 1 (mass), 2 (min), 3 (max)

Open circuit voltage/short-circuit current approx. 10 V AC (approx. 1 Hz) / approx. 5 mA

Control input min./max. control system: terminals 1, 2, 3

Response sensitivity 1 ... 30 kΩ , adjustable via potentiometer (20 turns)

Output

Connection terminals 7, 8, 9

Output 1 changeover contact

Contact loading 253 V AC/2 A/cos φ > 0.7; 40 V DC/2 A resistive load

Energized/De-energized delay approx. 1 s / approx. 1 s

Electrical isolation

Input/Output basic insulation according to EN 50178, rated insulation voltage 253 V

Input/power supply basic insulation according to EN 50178, rated insulation voltage 253 V

Output/power supply basic insulation according to EN 50178, rated insulation voltage 253 V

Directive conformity

Electromagnetic compatibility

Directive 2004/108/EC EN 61326-1:2006

Low voltage

Directive 2006/95/EC EN 50178:1997

Conformity

Insulation coordination EN 50178:1997

Electrical isolation EN 50178:1997

Electromagnetic compatibility NE 21:2006

Degree of protection IEC 60529:2001

Ambient conditions

Ambient temperature -20 ... 60 °C (-4 ... 140 °F)

Mechanical specifications

Degree of protection IP20

Connection screw connection, max. 2.5 mm

Mass approx. 110 g

Dimensions 20 x 107 x 115 mm (0.8 x 4.2 x 4.5 in) , housing type B1

Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001

Indication and operation

Control elements switch S1

General information

Supplementary information Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be

103.5 ... 126 V AC , 45 ... 65 Hz

n

on/off control system: terminals 1, 3

eff

eff

eff

2

Position I open circuit current: In the open circuit current principle, the relay becomes active when the limit is
reached.
Position II closed circuit current: In closed circuit current principle, the relay is activated when power is applied.
The relay is deactivated when the limit is reached.

observed where applicable. For information see

Release date 2012-09-26 14:51 Date of issue 2015-02-16 096047_eng.xml

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

Pepperl+Fuchs Group

2