WIKA OT-1 - Manual (Page 11)

11 WIKA operating instructions OEM pressure transmitter, model OT-1
2127027.02 09/2013 GB/D/F/E
GB
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
30 m or leaves the building.
■ Use a cable with suitable characteristics for the particular operating conditions.
■ For cable variants, strain relief must be employed.
■ Cable with ventilation tubes must be vented to atmosphere.
■ The instrument must be grounded via the process connection.
■ 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 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.
■ This equipment is intended for operation with low voltages, which are separated from the power supply or voltages
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)
2-wire 3-wire
4 3
1 2
U
+
1 1
U- 3 3
S
+
- 4
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.
Cable outlet
2-wire 3-wire
U
+
brown brown
U- green blue
S
+
- white
Metri-Pack series 150 (3-pin)
2-wire 3-wire
U
+
B B
U- A A
S
+
- C