Manual

27
Installation and wiring
Type 8011
7.4. Electrical wiring
danger
Risk of injury due to electrical discharge
• Shut down and isolate the electrical power source before carry-
ing out work on the system.
• Observe all applicable accident protection and safety regula-
tions for electrical equipment.
note
• Use cables with an operating temperature limit suitable for your
application.
• Protect the power supply of a version with 2 pulse outputs by
means of an 800 mA fuse and a switch.
• Protect the power supply of a version with 1 pulse output by
means of a 50 mA fuse and a switch.
Use a high quality electrical power supply (filtered and
regulated).
•
Under normal conditions of use, cable with a cross section
of 0.75 mm
2
should be enough to transmit the signal.
•
Do not install the cable near high voltage or high frequency
cables.
• If this is unavoidable, keep a minimum distance of 30 cm.
Make sure the installation is equipotential (power supply
- 8011):
•
Connect the different earth connections of the installation to
one another in order to remove any differences in potential
which may arise between two earth connections.
• Correctly connect the cable shielding to the earth.
•
Connect the negative power supply terminal to the earth to
eradicate the effects of common mode currents. If this con-
nection cannot be made directly, a 100 nF/50 V capacitor
can be fitted between the negative power supply terminal
and the earth.
+
-
(*)
(**)
Power supply
8011 with cable gland
+
-
(*)
(**)
Power supply
8011 with M12 fixed
connector
*) If a direct earth connection is not possible, fit a 100 nF/50 V condenser
between the negative power supply terminal and the earth
**) If the cable used is shielded.
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