Technical specifications of the KFD2-STC5-Ex1
| Main Features | ||
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| Signal type | Analog input | |
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Parameters related to functional safety |
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| Safety Integrity Level (SIL) | SIL 2 | |
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Supply |
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| Connection | Power bus or terminals 14+, 15- | |
| Nominal voltage | 18 ... 30 V DC | |
| pulsation | within delivery tolerances | |
| Power dissipation | ≤ 1 W at maximum load | |
| Power consumption | ≤ 1.6 W at maximum load | |
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Entrance |
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| Connection side | side of the field | |
| Connection | terminals 1+, 2-, 3 | |
| Input signal | 4 ... 20 mA | |
| Open circuit voltage/short circuit current | terminals 1+, 3: 23 V / 25 mA | |
| Input impedance | Max 265 Ohm terminals 2-, 3, max 330 Ohm terminals 1+, 3 | |
| Available voltage | ≥ 16 V at 20 mA; ≥ 20 V at 4 mA, terminals 1+, 3 | |
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Exit |
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| Connection side | control side | |
| Connection |
terminals 7+, 8-, 9- (drain) terminals 7-, 8+, 9+ (source) see additional information |
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| Load | 0 ... 800 Ohm | |
| Output signal | 4 ... 20 mA (overload > 25 mA) | |
| pulsation | Max. 50 µA RMS | |
| External power supply (loop) |
2 ... 30 V DC current If the external voltage is > 19 V, a load ≥ ((V - 19) / 0.02) Ω is required. V represents the value of the external voltage. The internal 250 ohm resistor at terminal 9 can be used as a load. |
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Transmission characteristics |
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| Deviation |
at 20 °C (68 °F), 4 ... 20 mA ≤ 10 µA incl. calibration, linearity, hysteresis, loads and supply voltage variations |
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The influence of ambient temperature | ≤ 0.25 μA/K |
| Frequency range |
from the field side to the control side: bandwidth with 0.5 V pp signal 0 ... 7.5 kHz (-3 dB) control side field side: bandwidth with 0.5 V pp signal 0.3 ... 7.5 kHz (-3 dB) |
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| Settlement time | 200 µs | |
| Rise time/fall time | 100 µs | |
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Galvanic isolation |
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| Output/Power | functional insulation, rated insulation voltage 50 V AC | |
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Indicators/settings |
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| Display elements | LED | |
| Marking | marking space at the front | |
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Compliance with the directive |
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| Electromagnetic compatibility |
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Directive 2014/30/EU | EN 61326-1:2013 (industrial premises) |
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Correspondence |
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| Electromagnetic compatibility |
NE 21:2012 EN 61326-3-2:2008 |
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| Degree of protection | IEC 60529:2001 | |
| Protection against electric shock | UL 61010-1:2012 | |
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Environmental conditions |
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| Ambient temperature | -20 ... 70 °C (-4 ... 158 °F) | |
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Mechanical characteristics |
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| Degree of protection | IP20 | |
| Connection | screw terminals | |
| weight | approx. 150 g | |
| Dimensions | 20 x 124 x 115 mm (0.8 x 4.9 x 4.5 in) (W x H x D), case type B2 | |
| Installation | on a 35 mm DIN rail in accordance with EN 60715:2001 | |
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Data for use in hazardous areas |
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| EU Type Examination Certificate | CML 17 ATEX 2029X | |
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Marking |
 II (1)G [Ex ia Ga] IIC II (1)D [Ex ia Da] IIIC I (M1) [Ex ia Ma] I
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Entrance | [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I |
| Supply |
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Maximum safe voltage | 250 V (Caution! Nominal voltage may be lower.) |
| Equipment | terminals 1+, 3- | |
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Voltage | 26.2 V |
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Voltage | 27.25 V |
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Current | 93 mA |
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Power | 634 MW |
| Equipment | terminals 2-, 3 | |
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Voltage | 30 V |
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Current | 115 mA |
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Power | max 1 W |
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Voltage | 2 B |
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Current | 8.5 mA |
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Power | 4.3 mW |
| Equipment | terminals 1+, 2 / 3- | |
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Voltage | 26.2 V |
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Voltage | 27.25 V |
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Current | 115 mA |
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Power | 784 MW |
| Certificate | CML 17 ATEX 3028X | |
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Marking |
II 3G Ex ec IIC T4 Gc
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| Galvanic isolation |
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Input, output | safe electrical insulation in accordance with IEC/EN 60079-11:2007, peak voltage value 375 V |
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Input/Power | safe electrical insulation in accordance with IEC/EN 60079-11:2007, peak voltage value 375 V |
| Compliance with the directive |
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Directive 2014/34/EU | EN IEC 60079-0:2018, EN 60079-7:2015+A1:2018, EN 60079-11:2012 |
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International certificates |
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| UL approval | E106378 | |
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Control drawing | 116-0439 (cULus) |
| IECEx certification |
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IECEx Certificate | IECEx CML 17.0015X |
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IECEx marking | [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I, Ex ec IIC T4 Gc |