Name: WIKA IS-3
Brand: WIKA
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38 WIKA operating instructions pressure transmitter, model IS-3

MM/YYYY country code based on 14095850.02 12/2014 EN/CN

6.3 Electrical mounting

1. Use and assemble connection cable that is suitable for the application. The specications of the individual electrical

connections are found in the following table, “Specications of electrical connections”.

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For cables with exible wires, always use ferrules appropriate for the wire cross-section.

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Select a cable diameter that matches the cable gland of the plug. Make sure that the cable gland of the mounted

plug has a tight t and that the seals are present and undamaged. Tighten the threaded connection and check

that the seals are correctly seated.

WARNING!

Danger to life through improper mounting

If the pressure transmitter is not mounted properly, the explosion protection can no longer be

ensured.

- Leads with bare ends must be nished with end splices (cable preparation).

2. Ground the case via the process connection to protect the pressure transmitter against electromagnetic elds and

electrostatic discharge. Include the case in the equipotential bonding of the application.

3. Setting up an intrinsically safe voltage supply.

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For ignition protection Ex i

- Power the pressure transmitter via an intrinsically safe circuit (Ex ia). Both the internal capacitance and

inductance must be considered, see chapter 3 “Specications”. With a certied isolated barrier (e.g. model

KFD2-STC4-Ex1) or a certied Zener barrier, the isolation of the voltage and current supply between Ex and

non-Ex areas, which is an absolute requirement, can be realised.

- For applications that require EPL Gb or Db, the power supply and signal circuit should have a protection level

of “ib”. Then the interconnections and thus the pressure transmitter will have a protection level of II 2G Ex ib IIC

T4/T5/T6 Gb or II 2D Ex ib IIIC T4/T5/T6 Db, although the pressure transmitter is marked otherwise (see EN

60079-14 section 5.4).

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For ignition protection Ex nA and Ex tc

For ignition protection Ex nA: Connect the pressure transmitter marked “Ex nA IIC T4/T5/T6” to a power supply

and signal circuit with protection against transients in accordance with IEC 60079-15:2010 section 13 c).

6. Commissioning, operation

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WIKA IS-3 Specifications

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