WIKA DI25 - Handbuch (Seite 17)

17 WIKA operating instructions digital indicator, model DI25
14076218.01 12/2013 GB/D
GB
6. Commissioning, operation
6.2 Electrical mounting
DANGER!
Danger of death caused by electric current
Upon contact with live parts, there is a direct
danger of death.
■ The instrument may only be installed and mounted by skilled personnel.
■ 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!
■ Before installation and mounting the digital indicator ensure the power
supply is disconnected.
6.2.1 Wiring the digital indicator
■ The connection terminals of the digital indicator are designed for cable connection
from above. The connection lines must be inserted from above and be tightened with
the terminal screws.
■ While wiring, the cables must not be laid near alternating current sources or load
cables in order to prevent disturbances from outside.
■ Do not connect mains voltage to sensor input. Make sure the voltage supply does not
interact with the sensor.
■ While using switching outputs, use an external load relay if necessary, in order to
protect the built-in relay from being overloaded.
■ This instrument does not have built-in switches, overpressure protection or a fuse.
Therefore, it is necessary to build these into the circuit outside of the instrument.
(Recommended fuse: Slow-acting fuse, rated voltage AC 250 V, 2 A).
■ Use thermocouples and compensating cables in accordance with the sensor-input
configuration.
■ Use resistance thermometer in 3-wire version, which is in accordance with the input
specifications of the digital indicator.
■ Use only solder-free cable lugs with insulated sleeving. The cable lugs must be
suitable for M3 size screws in accordance with the following table.
Ring cable lug Fork-type cable lug
Dimensions
≤ 5.8 mm
3.2 mm
≤ 5.8 mm
3.2 mm
Torque 0.6 ... 1.0 Nm 0.6 ... 1.0 Nm