WIKA A-1200 Manual De Instrucciones página 11

5. Commissioning, operation
5.4 Electrical mounting
5.4.1 Requirements for voltage supply
→ For supply voltage see product label
For instruments without UL approval:
This equipment is intended for operation with low voltages which are separated from the AC 230 V (50 Hz) mains
voltage or voltages greater than AC 50 V or DC 120 V for dry environments. A connection to an SELV circuit is recom-
mended, or alternatively to circuits with a different protective measure in accordance with IEC 60364-4-41 installation
standard.
For instruments with UL approval and for use in North America:
The power supply for the pressure switch must be made via an energy-limited electric circuit in accordance with
section 9.4 of UL/EN/IEC 61010-1, or an LPS per UL/EN/IEC 60950-1/CSA C22.2 no. 60950-1, or class 2 in
accordance with UL1310/UL1585 (NEC or CEC). The voltage supply must be suitable for operation above 2,000 m
should the pressure switch be used at this altitude.
5.4.2 Requirements for electrical connection
Ingress protection of the mating connector corresponds to the ingress protection of the pressure sensor.
■
Cable diameter matches the cable bushing of the mating connector.
■
Cable gland and seals of the mating connector are correctly seated.
■
No humidity can ingress at the cable end.
■
5.4.3 Requirement for shielding and grounding
The pressure sensor must be grounded via the process connection.
When working during a running process operation, measures to prevent electrostatic discharge on the connection
terminals should be taken, as a discharge could lead to temporary corruption of the measured value.
5.4.4 Connecting the instrument
1. Assemble the mating connector or cable outlet.
→ For pin assignment see product label
2 Establish the plug connection.
.
WIKA operating instructions, pressure sensor, model A-1200
EN
11