1. General Introduction
The proximity sensor or switch controls a form A normally open relay contact for the safe area load. The normal output state can be reversed using switches S1 and S2. Switch S3 is used to enable or disable line fault detection of the field circuit. During an error condition, relays revert to their de-energized ,state and LEDs indicate the fault according to NAMUR NE44. A unique collective error messaging feature is available when used with the Power Rail system. Due to its compact housing design and low heat dissipation,this device is useful for detecting positions, end stops, andswitching states in space-critical applications.
2. General Specification for KFD2-SR2-Ex2.W
Model | KFD2-SR2-Ex2.W |
General specifications | |
Signal type | Digital Input |
Functional safety related parameters | |
Safety Integrity Level (SIL) | SIL 2 |
Supply | |
Connection | Power Rail or terminals 14+, 15- |
Rated voltage Ur | 20 ... 30 V DC |
Ripple | ≤ 10 % |
Rated current Ir | ≤ 50 mA |
Power dissipation | 1 W |
Power consumption | < 1.3 W |
Input | |
Connection side | field side |
Connection | terminals 1+, 2+, 3-; 4+, 5+, 6- |
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 ≤ 0.1 mA , short-circuit I > 6 mA |
Pulse/Pause ratio | ≥ 20 ms / ≥ 20 ms |
Output | |
Connection side | control side |
Connection | output I: terminals 7, 8, 9 ; output II: terminals 10, 11, 12 |
Output I, II | signal, relay |
Contact loading | 253 V AC/2 A/cos φ > 0.7; 126.5 V AC/4 A/cos φ > 0.7; 40 V DC/2 A resistive load |
Minimum switch current | 2 mA / 24 V DC |
Energized/De-energized delay | approx. 20 ms / approx. 20 ms |
Mechanical life | 107 switching cycles |
Transfer characteristics | |
Switching frequency | ≤ 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 | LEDs |
Control elements | DIP-switch |
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 | |
Electromagnetic compatibility | NE 21:2006 |
Degree of protection | IEC 60529:2001 |
Input | EN 60947-5-6:2000 |
Ambient conditions | |
Ambient temperature | -20 ... 60 °C (-4 ... 140 °F) |
3. Connection
4. Configuration
