zebris Medical GmbH
FDM-T Technical Data and Operating Instructions
Page 60/65
8.2.3 Use of multiple sockets
The following information and warnings are based on the requirements of the Standard
DIN EN 60601-1:2006, Section 11 for medical electrical equipment and have to be en-
forced when the FDM-T system is used for medical purposes.
WARNING
If multiple sockets are used for connecting the FDM-T system or its
components, the following safety regulations are to be observed:
Always connect the treadmill and FDM-T sensor directly to mains supply by using a
separate wall socket with a tested protective earth conductor and separate fuse.
Multiple sockets can be used without causing any danger for connecting the PC and
other electrical accessories (video camera, illumination) outside the patients’ vicinity.
Multiple sockets must not be placed on the floor to avoid accidentally penetration of liq-
uids or mechanical damages.
It is forbidden to use extension cables or several multiple sockets connected in series.
In commercially available multiple sockets, system components set up within and out-
side the vicinity of the patient must never be plugged in together. (Example: It is forbid-
den to connect the PC and the power supply unit of the FDM-T sensors to the same
multiple socket.)
If multiple sockets are used jointly for components of the FDM-T system, that are al-
lowed to be located within the vicinity of the patient (e.g. treadmill, FDM-T sensor or
other zebris measuring systems) and components that have to be outside the vicinity of
the patient (e.g. PC, video camera), the multiple socket and complete interconnection of
the system must adhere to all the requirements of DIN EN 60601-1:2006 Section 16. If
necessary, an isolating transformer is to be used for an arrangement of this kind, and
the ground leakage current in the protective earth conductor of the multiple sockets
must not exceed 5 mA. The adherence to the maximum permissible patient leakage
currents is to be verified by measuring. If a multiple socket was integrated after setting
the system into operation for the first time, no additional device may be connected to it
(use multiple sockets with locking covers for this purpose)
WARNING
It is extremely dangerous to use multiple sockets for combining the
mains connection of components of Medical Electrical Equipment
Systems with other components that have not been supplied at the
same time.
It is possible for excessive touch currents to occur if mains are con-
nected without the user having any respective expert knowledge.
Due to these complications zebris Medical GmbH urgently advises
not to use multiple sockets for operation of the system.