Kobold ZOK-E1, Дополнительные инструкции по эксплуатации

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ZOK-Ex
ZOK-Ex K08/0322 page 7
c. Sensors that require auxiliary power:
Examples of this type of sensor are 3-wire sensors, pre-amplified coils of turbine
knives or Namur proximity sensors. The voltage required to power the sensor
comes from the approved power supply and flows through the ZOK-Ex device.
These sensors must be certified and the input parameters of the sensor must not
be smaller than the unit parameters of the ZOK-Ex instrument:
Vi = 8.2 VDC, Ii = 100 mA, Pi = 0.7 W
The power supply of the ZOK-Ex instrument must come from a certified source
(commonly known as an isolating switch amplifier). The output parameters of the
amplifier must not be higher than those of the ZOK-Ex device:
Vi = 28 VDC, Ii = 100 mA, Pi = 0.7 W
Connection examples with the DON sensor options -HA/KA/GA/DA are shown in
section 12.
d. Other sensors:
Certified sensors that cannot be fed from the ZOK-Ex electronics can also be
connected to the ZOK-Ex devices. For this purpose, the corresponding sensor
must be supplied separately from an intrinsically safe power supply and the
sensor signal must be transferred to the ZOK-Ex electronics in an electrically
isolated manner (e.g. via an optocoupler output).
In this case, the same connection diagram is recommended as for 3-wire
sensors. (see c.)
Electrical outputs (only ZOK-E2/E3/E5):
The ZOK-Ex electronics (except ZOK-E1) are certified to provide different
output signals (analog, switching or pulse signal). In order to be able to use the
outputs, they must be operated with a separately constructed intrinsically safe
circuit.
In all cases, the output parameters of the associated power supply unit must not
exceed the input parameters of the ZOK-Ex electronics:
Vi = 28 VDC, Ii = 100 mA, Pi = 0.7 W