KFD2 - VR4 - Ex1 . 26 Voltage Repeater 0 / 4 - 20mA Dual Output Isolated Safety Barrier SIL2

* 24 V DC supply (Power Rail)
* Voltage input 0 V ... -20 V
* Vibration sensor inputs
* Voltage/current field supply
* Voltage output 0 V ... -20 V
* Up to SIL 2 acc. to IEC/EN 61508
| General specifications | ||||
| Signal type | Analog input | Digital Input | ||
| Functional safety related parameters | ||||
| Safety Integrity Level (SIL) | SIL 2 | SIL 2 | ||
| Supply | ||||
| Connection | Power Rail or terminals 11+, 12- | |||
| Rated voltage | Ur | 19 ... 30 V DC | ||
| Ripple | within the supply tolerance | |||
| Power dissipation | ≤ 1.2 W | |||
| Power consumption | ≤ 1.6 W | |||
| Input | ||||
| Connection side | field side | |||
| Connection | terminals 4 (common), 1, 3 and 5 (supply -), 2 and 6 (signal -) | |||
| Input resistance |
10 kΩ terminals 4 (common), 6-/2- | |||
| Output rated operating current | terminals 4 (common), 5-: > 10 mA at -21 V or > 20 mA at -18 V
terminals 4 (common), 1-: 5.3 mA ±0.4 mA at -10 V
terminals 4 (common), 3-: 3.6 mA ±0.7 mA at -10 V, 20 °C (68 °F)
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| Transmission range | -20 ... 0 V | |||
| Output | ||||
| Connection side | control side | |||
| Connection | terminals 7-, 8+ | |||
| Voltage | -20 ... 0 V | |||
| Load | ≥ 9 kΩ (3-wire sensor), ≥ 2 kΩ (2-wire sensor) | |||
| Output resistance | 24 Ω typ., 27 Ω maximum
Since this is much less than the end-to-end resistance of a zener barrier, it may be necessary to specify a monitor intended for use without a barrier. Please follow the advice of the monitor manufacturer.
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| Transfer characteristics | ||||
| Cut-off frequency |
10 kHz (-0,1 dB)
20 kHz (-1 dB)
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| Deviation | DC transfer error (with 10 kΩ load) < 10mV | |||
| After calibration | additional error with AC superimposed is ±5 mV at 20 °C (68 °F) at any point within the span, provided that the alternating component of the input voltage is not excessive,
e. g.
- square waves (0 ... 20 kHz): 5 Vpp
- sine waves (0 ... 20 kHz): the full span of 20 Vpp (= 100 g peak acceleration at 100 mV/g) is acceptable.
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| Influence of ambient temperature | (< 100 ppm of span)/K at any point within the span | |||
| Time delay relative to input | 7.1 ±0.3 µs | |||
| Ripple | in 200 kHz bandwidth < 20 mVrms
in 20 kHz bandwidth < 3 mVrms
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