KCD2-SR-Ex2 Switch Amplifier, 2-channel isolated barrier, 24 V DC supply (Power Rail), dry contact or NAMUR inputs.
This isolated barrier is used for intrinsic safety applications.
The device transfers digital signals from NAMUR sensors or dry contacts from the hazardous area to the non-hazardous area.
The proximity sensor or the mechanical contact controls the control side load for a relay contact output. The device output changes the state when the input signal changes the state.
Via switches the mode of operation can be reversed and the line fault detection can be switched off.
During a fault condition, the relay reverts to its de-energized state and the LEDs indicate the fault according to NAMUR NE 44.
If the device is operated via Power Rail, additionally a collective error message is available.
Due to its compact housing design and low heat dissipation, this device is useful for detecting positions, end stops, and switching states in spacecritical applications.
Technical Data
General specifications
Signal type Digital Input
Functional safety related parameters
Safety Integrity Level (SIL) SIL 2
Supply
Connection Power Rail or terminals 9+, 10-
Rated voltage Ur 19 ... 30 V DC
Ripple ā¤ 10 %
Rated current Ir ā¤ 46 mA
Power dissipation ā¤ 900 mW
Power consumption ā¤ 900 mW
Input
Connection side field side
Connection terminals 1+, 2-; 3+, 4-
Rated values acc. to EN 60947-5-6 (NAMUR)
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
Line fault detection breakage I ā¤ 0.1 mA , short-circuit I ā„ 6.5 mA
Pulse/Pause ratio min. 20 ms / min. 20 ms
Output
Connection side control side
Connection terminals 5, 6; 7, 8
Output I signal ; relay
Output II signal ; relay
Contact loading 250 V AC/2 A/cos Ļ > 0.75; 126.5 V AC/4 A/cos Ļ > 0.75; 30 V DC/2 A resistive load
Minimum switch current 2 mA / 24 V DC
Energized/De-energized delay ā¤ 20 ms / ā¤ 20 ms
Mechanical life 107 switching cycles
Transfer characteristics
Switching frequency ā¤ 10 Hz
Galvanic isolation
Input/Output reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Input/power supply reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output/power supply reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output/Output reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Indicators/settings
Display elements LEDs
Control elements DIP switch
Configuration via DIP switches
Labeling space for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EU EN 61326-1:2013 (industrial locations)
Low voltage
Directive 2014/35/EU EN 61010-1:2010+A1:2019+A1:2019/AC:2019
Conformity
Electromagnetic compatibility NE 21:2017 , EN 61326-3-1:2017 , EN IEC 61326-3-2:2018
Degree of protection IEC 60529:1989+A1:1999+A2:2013
Functional safety IEC/EN 61508:2010
Input EN 60947-5-6:2000
Ambient conditions
Ambient temperature -40 ... 70 Ā°C (-40 ... 158 Ā°F)
Mechanical specifications
Degree of protection IP20
Connection screw terminals
Mass approx. 100 g
Dimensions 12.5 x 119 x 114 mm (0.5 x 4.7 x 4.5 inch) (W x H x D) , housing type A2
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificate BASEEFA 06 ATEX 0092 X
Marking 1 II 3(1)G Ex ec nC [ia Ga] IIC T4 Gc , 1 II (1)D [Ex ia Da] IIIC , 1 I (M1) [Ex ia Ma] I
Input Ex ia
Voltage Uo 10.5 V
Current Io 13 mA
Power Po 34 mW (linear characteristic)
Supply
Maximum safe voltage Um 253 V AC (Attention! Um is no rated voltage.)
Output
Contact loading Zone 2 : 50 V AC/2 A/cos Ļ > 0.75; 30 V DC/2 A resistive load
Maximum safe voltage Um 253 V AC (Attention! The rated voltage can be lower.)
Fault indication output
Maximum safe voltage Um 40 V DC (Attention! Um is no rated voltage.)
Galvanic isolation
Input/Output safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Input/power supply safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity
Directive 2014/34/EU EN IEC 60079-0:2018 , EN 60079-7:2015+A1:2018 , EN 60079-11:2012 , EN IEC
60079-15:2019
International approvals
UL approval E106378
Control drawing 116-0477 (cULus)
IECEx approval
IECEx certificate IECEx BAS 06.0025 X
IECEx marking Ex ec nC [ia Ga] IIC T4 Gc
[Ex ia Da] IIIC
[Ex ia Ma] I
