MEDC XB10 Manuel Technique page 4

Ensure stranded or multiple strand cable is used to terminate the XB10.
After cable termination has been completed, the PCB can be fully in-serted into the enclosure, ensuring the spacer
on the bottom of PCB 'snaps' into the retaining clip on the boss inside the enclosure. Be aware of correct PCB
orientation, illus-trated by label adhered to inside wall of case.
To replace the cover, use the same procedure as above but in reverse manner, ensuring the cover is screwed
tightly. There should be a maximum gap of 0.2mm between the faces of the enclosure and cover to ensure
o-ring compression.
EExde Unit
Unscrew the 2 off M5 screws & lift off the EExe terminal cover.
Warning: Do not remove silicone grease from EExde cover seal or cover screws.
Terminate the field wiring as illustrated in Figure 3.
Not more than one single or multi-ple strand lead shall be connected into either side of any terminal, unless
multiple conductors have been joined in a suitable manner, e.g. two conductors into a single insulated crimped
boot lace ferrule.
Leads connected to the terminals shall be insulated for the appropri-ate voltage and this insulation shall extend
to within 1mm of the metal of the terminal throat.
All terminal screws, used and unused, shall be tightened down.
Conductive metalwork (inc. cable glands) must be a minimum of 5mm away from the terminals.
After cable termination has been completed, reverse the above en suring o-ring is seated correctly in cover,
ensuring IP67 rating is maintained. Do not over-tighten the cover screws.
1.3 GENERAL
When installing and operating ex -plosion-proof electrical equipment, the relevant national regulations for instal-
lation and operation (e.g. EN60079-14 and IEE Wiring Regulations) must be observed.
Ensure that all nuts, bolts and fixings are secure.
Painting and surface finishes, other than those applied by MEDC, are not permitted.
2.0 OPERATION
The XB10 xenon beacon can be powered directly or initiated via a telephone-ringing signal, depend-ing on
electronic configuration supplied.
3.0 MAINTENANCE
During the working life of the unit, it should require little or no maintenance. GRP will resist attack by most acids,
alkalis and chemicals and is as resistant to concentrated acids and alkalis as most metal products.
However, if abnormal or unusual environment conditions occur due to plant damage or accident etc. then visual
inspection is recommended.
If the unit requires cleaning, then only clean exterior with a damp cloth to avoid electro-static charge build-
up.
The replacement of the xenon tube, see Section 3.1 below, can be carried out by competent site personnel. Other
repairs should be undertaken by returning the unit to MEDC or by an authorised repairer of Ex equipment.
If you acquired a significant quantity of units, then it is recommended that spares are also made available.
(Please discuss your requirements with our Technical Sales Engineers).
3.1 REMOVING/REPLACING XENON TUBE ASSEMBLY
CAUTION: Before removing the cover assembly, ensure that the power to the unit is isolated.
Unscrew the grub screw on the lens cover assembly one full turn (2.0mm AF hexagon key required). Unscrew
and remove the lens cover.
Remove the old tube assembly by unscrewing the terminal block fixings. The replacement xenon tube assembly
can now be fitted.
04/09 © MEDC 2003