WE 77/Ex-1 115V
1
Release date 2011-09-20 13:58 Date of issue 2015-03-03 129199_eng.xml
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
Pepperl+Fuchs Group USA: +1 330 486 0002 Singapore: +65 6779 9091Germany: +49 621 776 2222
www.pepperl-fuchs.com pa-info@us.pepperl-fuchs.com pa-info@de.pepperl-fuchs.com pa-info@sg.pepperl-fuchs.com
Switch Amplifier
Input EEx ia IIC
red
Output
Testing the bridges
Safe area Hazardous area
Power supply
1- 2+
1- 2+
1- 3 4
+
52+
1- 2+
10
8 9 7 11~12
+-
&
=1
1
LB
~
Composition
Successor KFA5-SR2-Ex1.W
Connection
• 1-channel
• Control circuit EEx ia IIC
• 115 V AC supply voltage
• Reversible mode of operation
• Lead breakage (LB) monitoring
• 1 relay output with 1 changeover
contact
WE 77/Ex-1 115V
The transformer isolated barrier
transfers digital signals into hazardous
areas. Sensors per EN 60947-5-6
(NAMUR) or mechanical contacts may
be used as transmitters.
The control circuit is monitored for lead
breakage (LB).
Function
2
WE 77/Ex-1 115VTechnical data
Release date 2011-09-20 13:58 Date of issue 2015-03-03 129199_eng.xml
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
Pepperl+Fuchs Group USA: +1 330 486 0002 Singapore: +65 6779 9091Germany: +49 621 776 2222
www.pepperl-fuchs.com pa-info@us.pepperl-fuchs.com pa-info@de.pepperl-fuchs.com pa-info@sg.pepperl-fuchs.com
Supply
Connection terminals 11, 12
Rated voltage Un103.5 ... 126 V AC , 45 ... 65 Hz
Power loss 1.6 W
Power consumption approx. 2.3 VA
Input
Connection terminals 1-, 2+
Rated values acc. to EN 60947-5-6 (NAMUR), see system description for electrical data
Open circuit voltage/short-circuit current approx. 8 V DC / approx. 8 mA
Switching point/switching hysteresis 1.2 ... 2.1 mA / approx. 0.2 mA
Pulse/Pause ratio ≥ 0.5 ms / ≥ 0.5 ms
Line fault detection breakage I ≤ 0.1 mA
Output
Connection terminals 7, 8, 9
Output signal ; relay
Contact loading 253 V AC/2 A/500 VA/cos φ min. 0,7; 125 V AC/4 A/500 VA cos φ min. 0,7; 40 V DC/2 A/80 W ohmic load
Energized/De-energized delay approx. 10 ms / approx. 20 ms
Mechanical life 107 switching cycles
Transfer characteristics
Switching frequency < 10 Hz
Electrical isolation
Output/power supply basic insulation according to IEC 61140, rated insulation voltage 300 Veff
Output/Output functional insulation acc. to EN 50178, rated insulation voltage 300 Veff
Directive conformity
Electromagnetic compatibility
Directive 2004/108/EC EN 61326-1:2006
Low voltage
Directive 2006/95/EC EN 50178:1997
Conformity
Degree of protection IEC 60529
Ambient conditions
Ambient temperature -25 ... 60 °C (-13 ... 140 °F)
Mechanical specifications
Degree of protection IP20
Mass approx. 390 g
Dimensions 40 x 104 x 110 mm (1.6 x 4.1 x 4.3 in)
Data for application in connection
with Ex-areas
EC-Type Examination Certificate PTB 02 ATEX 2065 , for additional certificates see www.pepperl-fuchs.com
Group, category, type of protection ¬ II (1)GD [EEx ia] IIC [circuit(s) in zone 0/1/2]
Voltage Uo 13.4 V DC
Current Io 31 mA
Power Po 145 mW (trapezoid characteristic curve)
Supply
Maximum safe voltage Um126.5 V AC (Attention! The rated voltage can be lower.)
Output
Maximum safe voltage Um253 V AC (Attention! The rated voltage can be lower.)
Electrical isolation
Input/Output safe galvanic isolation acc. to EN 50020, voltage peak value 375 V
Input/power supply safe galvanic isolation acc. to EN 50020, voltage peak value 375 V
Directive conformity
Directive 94/9/EC EN 50014, EN 50020
General information
Supplementary information EC-Type Examination Certificate, Statement of Conformity, Declaration of Conformity, Attestation of
Conformity and instructions have to be observed where applicable. For information see www.pepperl-
fuchs.com.
3
WE 77/Ex-1 115VTechnical data
Release date 2011-09-20 13:58 Date of issue 2015-03-03 129199_eng.xml
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
Pepperl+Fuchs Group USA: +1 330 486 0002 Singapore: +65 6779 9091Germany: +49 621 776 2222
www.pepperl-fuchs.com pa-info@us.pepperl-fuchs.com pa-info@de.pepperl-fuchs.com pa-info@sg.pepperl-fuchs.com
Mode of operation without lead breakage detection
Mode of operation with lead breakage detection
Mode of Operation
0-Signal
1-Signal
1-Signal
0-Signal
Jumpers
Jumpers between
terminals 4 and 5
Jumpers between
terminals 4 and 5
Jumpers between
terminals 3 and 4
Jumpers between
terminals 3 and 4
Output
Input
Relay energized
Relay de-energized
Relay de-energized
Relay enegized
0-Signal
1-Signal
0-Signal
1-Signal
10 kΩ
10 kΩ
10 kΩ
10 kΩ
Jumpers
Without jumpers
Output
Input
Relay energized
Wichout jumpers
Wichout jumpers
Without jumpers
Relay de-energized
Relay de-energized
Relay de-energized
