8
Safety notices
When installing be sure that no stray wires stick out through the ventilation slit of
the SIP Ring Switch into the housing. Ensure that no individual wires stand off from
leads, that the lead is fully contained in the clamp and that the screws are tightly
fastened. Fully tighten screws on unused terminals.
The power supply used for the SIP Ring Switch must absolutely ensure safe
isolation of the low-voltage side from the supply mains according to EN60950-1 and
must have “LPS“ designation.
EMC
1
NOTE
Only shielded network cables may be used for connecting the SIP Ring Switch to the
network.
In this case the SIP Ring Switch meet the noise immunity limits for industrial
applications and the stricter emissions limits for households and small businesses.
Therefore there are no EMC-related limitations with respect to the usability of the
devices in such environments.
The complete Declarations of Conformity for the devices described in the manual can
be found on the corresponding Internet page at the W&T homepage: http://www.wut.
de.
Batteries
The SIP Ring Switch contains a 3V lithium-manganese dioxide button battery type
CR1632 for backing up the internal clock. This battery has an expected lifetime of
10 years and must be replaced only by a battery of the same type.
When using the SIP Ring Switch in a network environment with access to a time
server, the battery is not essential for correct function of the device and can be
removed.
1
CAUTION
The battery may be removed or replaced by an electrotechnical specialist, only.
To remove the battery, open the housing as follows:
