1 WE 77/Ex
WE 77/Ex-1 115V
Switch Amplifier
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
1-
2+
1-
2+
1-
2+
1-
2+
3
4
5
+
Testing the bridges
Function
LB
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.
1
Safe area
•
•
•
•
•
•
Hazardous area
Input EEx ia IIC
&
=1
The control circuit is monitored for lead
breakage (LB).
+ -
red
~
8
9
7
Output
10
11~12
Power supply
Release date 2016-06-16 14:16
Date of issue 2016-06-16
129199_eng.xml
Composition
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
Pepperl+Fuchs Group
USA: +1 330 486 0002
Germany: +49 621 776 2222
www.pepperl-fuchs.com
pa-info@us.pepperl-fuchs.com
pa-info@de.pepperl-fuchs.com
Singapore: +65 6779 9091
pa-info@sg.pepperl-fuchs.com
1
Technical data
WE 77/Ex-1 115V
Supply
Connection
terminals 11, 12
Rated voltage Un
103.5 ... 126 V AC , 45 ... 65 Hz
Power dissipation
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 2014/30/EU
EN 61326-1:2013 (industrial locations)
Low voltage
Directive 2014/35/EU
EN 61010-1:2010
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 inch)
Data for application in connection
with Ex-areas
EC-Type Examination Certificate
PTB 02 ATEX 2065
Group, category, type of protection
¬ II (1)GD [EEx ia] IIC [circuit(s) in zone 0/1/2]
Voltage
Uo
13.4 V DC
Po
145 mW (trapezoid characteristic curve)
Current
Power
Supply
Io
31 mA
Maximum safe voltage Um
126.5 V AC (Attention! The rated voltage can be lower.)
Maximum safe voltage Um
253 V AC (Attention! The rated voltage can be lower.)
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
Electrical isolation
Directive conformity
Directive 2014/34/EU
EN 60079-0:2012+A11:2013 , EN 60079-11:2012
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.pepperlfuchs.com.
Release date 2016-06-16 14:16
Date of issue 2016-06-16
129199_eng.xml
Output
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
Pepperl+Fuchs Group
USA: +1 330 486 0002
Germany: +49 621 776 2222
www.pepperl-fuchs.com
pa-info@us.pepperl-fuchs.com
pa-info@de.pepperl-fuchs.com
Singapore: +65 6779 9091
pa-info@sg.pepperl-fuchs.com
2
Technical data
WE 77/Ex-1 115V
Mode of Operation
Mode of operation without lead breakage detection
Jumpers
Input
Output
Jumpers between
terminals 4 and 5
0-Signal
Relay energized
1-Signal
Relay de-energized
1-Signal
Relay enegized
0-Signal
Relay de-energized
Jumpers between
terminals 4 and 5
Jumpers between
terminals 3 and 4
Jumpers between
terminals 3 and 4
Mode of operation with lead breakage detection
Jumpers
Without jumpers
Wichout jumpers
Without jumpers
Output
10 kΩ
0-Signal
Relay energized
1-Signal
Relay de-energized
0-Signal
Relay de-energized
1-Signal
Relay de-energized
10 kΩ
10 kΩ
10 kΩ
Release date 2016-06-16 14:16
Date of issue 2016-06-16
129199_eng.xml
Wichout jumpers
Input
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".
Pepperl+Fuchs Group
USA: +1 330 486 0002
Germany: +49 621 776 2222
www.pepperl-fuchs.com
pa-info@us.pepperl-fuchs.com
pa-info@de.pepperl-fuchs.com
Singapore: +65 6779 9091
pa-info@sg.pepperl-fuchs.com
3
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