Do-more H2 Series PLC User Manual, 1st Edition, Rev. F - H2-DM-M
B-9
Appendix B: European Union Directives (CE)
1
B
3
D
5
H
7
10
I
10
11
12
13
14
A
B
C
D
Analog Modules and RF Interference
All AutomationDirect products are tested to withstand field strength levels up to 10V/m, which
is the maximum required by the relevant EU standards. While all products pass this test, analog
modules will typically exhibit deviations of their readings. This is quite normal, however,
systems designers should be aware of this and plan accordingly.
When assembling a control system using analog modules, these issues must be adhered
to and should be integrated into the system design. This is the responsibility of the system
builder/commissioner.
Network Isolation
For safety reasons, it is a specific requirement of the Machinery Directive that a keyswitch
must be provided that isolates any network input signal during maintenance, so that remote
commands cannot be received that could result in the operation of the machinery. The
FA–ISOCON does not have a keyswitch! Use a keylock and switch on your enclosure which
when open removes power from the FA–ISOCON. To avoid the introduction of noise into the
system, any keyswitch assembly should be housed in its own earth grounded steel box and the
integrity of the shielded cable must be maintained.
Again, for further information on EU directives we recommend that you get a copy of our
EU Installation Manual (DA–EU–M). Also, if you are connected to the World Wide Web, you
can check the EU Commission’s official site at: www.europa.eu/index_en.htm.
DC Powered Versions
Due to slightly higher emissions radiated by the DC powered versions of the Do-more H2 Series
PLC, and the differing emissions performance for different DC supply voltages, the following
stipulations must be met:
• The PLC must be housed within a metallic enclosure with a minimum amount of orifices.
• I/O and communications cabling exiting the cabinet must be contained within metallic
conduit/trunking.
