Connection Diagrams - WIKA OT-1 Manual De Instrucciones

6. Commissioning, operation
6.2 Electrical mounting
6.2.1 Connection assembly
Use the pressure transmitter with shielded cable. The cable shield must be grounded, if the cable is longer than
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30 m or leaves the building.
Use a cable with suitable characteristics for the particular operating conditions.
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For cable variants, strain relief must be employed.
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Cable with ventilation tubes must be vented to atmosphere.
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The instrument must be grounded via the process connection.
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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
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plug has a tight fit and that the seals are present and undamaged. Tighten the threaded connection and check that
the seal is correctly seated, in order to ensure the ingress protection.
For cable outlets, make sure that no moisture enters at the cable end.
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This equipment is intended for operation with low voltages, which are separated from the power supply or voltages
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of greater than AC 50 V or DC 120 V. Preferably, a connection to an SELV circuit is recommended, or alternatively to
circuits with a different protective measure in accordance with IEC 60364-4-41.

6.2.2 Connection diagrams

Circular connector M12 x 1 (4-pin)
U
+
4 3
U -
1 2
S
+
Metri-Pack series 150 (3-pin)
U
+
U -
S
+
WIKA operating instructions OEM pressure transmitter, model OT-1
2-wire 3-wire
1 1
3 3
- 4
2-wire 3-wire
B B
A A
- C
Cable outlet
U
+
U -
S
+
U+ Positive power supply
U- Negative power supply, reference potential
S+ Positive output terminal
2-wire The two connection lines are used for the voltage supply.
The measurement signal also provides the supply current.
3-wire Two connection lines are used for the voltage supply.
One connection line is used for the measurement signal.
2-wire 3-wire
brown brown
green blue
- white
11
EN