ROTRONIC HF8 - Manual (Page 14)

E-M-HF8-V2_10
Rotronic AG
Bassersdorf, Switzerland
Document code Unit
HygroFlex HF8 Humidity Temperature
Transmitter: User Guide Instruction Manual
Document Type
Page 14 of 35
Document title
© 2012; Rotronic AG E-M-HF8-V2_10
6 Electrical installation
6.1 General wiring guidelines
Power supply wiring
Heavy machinery and instrumentation should not share the same power supply wiring. If this cannot be
avoided, noise filters and surge protectors should be used. Most UPS devices have those features already
integrated.
Electrical Safety Warning
The HF8 transmitter series includes models designed to operate with a supply voltage of 85…265 VAC. For
safety reasons, the electrical installation of these models should be designed so as to provide adequate
protection in the form of an external circuit breaker, switch, fuse or other means of safely separating the
transmitter from the supply voltage. Appropriate safety warnings and instructions should be located by the
transmitter to prevent electrical shock when the transmitter enclosure is open.
General guidelines for signal cables
The following guidelines are derived from European Standard EN 50170 for the transmission of signals by
copper wires. When planning an installation, the rules provided by EN 50170 should be followed under
consideration of local circumstances to determine the position of machines and equipment.
All ROTRONIC products are tested for Electromagnetic Compatibility according to EMC Directive
2004/106/EG and following European standards:
- EN 61000-6-1: 2001, EN 61000-6-2: 2005
- EN 61000-6-3: 2005, EN 61000-6-4: 2001 + A11
Whenever the level of electromagnetic interference is expected to be high, both the instruments and signal
cables should be placed as far away as possible from the source of interference.
In general, signal cables should be installed in bundles or channels / conduits, separate from other cables as
indicated in the table below:
•
Bus signals such as RS485
•
Data signals for PCs, printers etc.
•
shielded analog inputs
•
unshielded direct current (<= 60V)
•
shielded process signals (<= 25 V)
•
unshielded alternate current (<= 25V)
•
coaxial cables for CRT monitors
in common bundles or channels / conduits
•
direct current from 60 V to 400 V
(unshielded)
•
alternate current from 25V to 400 V
(unshielded)
in separated bundles or channels /
conduits, without minimum distance