Commissioning; Electrical Mounting; Requirements For Hazardous Areas; Requirements For Connection Cable - WIKA DMSU21SA Manual De Instrucciones

5. Commissioning, operation

5.4 Commissioning

During the commissioning process pressure surges must be avoided at all costs. Open
the shut-off valves slowly.
EN

5.5 Electrical mounting

DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
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The instrument may only be installed and mounted by skilled electrical
personnel.
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Operation using a defective power supply unit (e.g. short-circuit from the
mains voltage to the output voltage) can result in life-threatening voltages
at the instrument!
5.5.1

Requirements for hazardous areas

Power the process transmitter via an intrinsically safe circuit (Ex ia). Both the
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effective internal capacitance and inductance must be considered (→ See chapter 15
"Specifications").
Provide the required voltage supply separation between Ex and non-Ex areas with a
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certified isolated barrier or Zener barrier (suitable isolated barrier, model IS Barrier).
- For applications that require EPL Gb, the power supply and signal circuit should
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have a protection level of "ib". Then the interconnections and the transmitter will have
a protection level of II 2G Ex ib IIC T4/T5/T6 Gb, even if the process transmitter is
marked otherwise (→ See EN 60079-14 section 5.4).
5.5.2

Requirements for connection cable

Use and assemble connection cable that is suitable for the application. For cables with
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flexible wires, always use ferrules appropriate for the wire cross-section.
Where there is electromagnetic radiation above the test values per EN 61326, a
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shielded connection cable must be used.
When using an M12 x 1 (4-pin) circular connector, the mating connector is supplied by
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the customer. Ensure the matching design from the connector manufacturer.
Electrical connections
Spring-loaded terminals
Cable gland M20 x 1.5, stainless
steel in hygienic design
Angular connector DIN 175301-803A
with mating connector
Circular connector M12 x 1 (4-pin)
without mating connector
20
Wire cross-section:
Wire or strand: 0.2 ... 2.5 mm² (AWG 24 ... 14)
Strand with end splice: 0.2 ... 1.5 mm² (AWG 24 ... 16)
Cable diameter: 6 ... 12 mm [0.24 ... 0.47 in]
Cable diameter: 6 ... 8 mm [0.24 ... 0.31 in]
Wire cross-section: max. 1.5 mm² (AWG 16)
Observe manufacturer's specifications
WIKA operating instructions, model DMSU21A