1
Xenon beacon Xb4
TM148.H May 2022 www.eaton.com
Xenon beacon XB4
English
1.0 Introduction
These high output (21 Joule) beacons have been designed
for use in potentially explosive atmospheres and harsh
environmental conditions. The marine grade alloy or
stainless steel enclosures are suitable for use offshore
or onshore, where light weight combined with corrosion
resistance and strength is required.
2.0 Installation
General
When installing and operating explosion-protected
equipment, requirements for selection, installation
and operation should be referred to e.g. IEE Wiring
Regulations and the ‘National Electrical Code’ in North
America. Additional national and/or local requirements
may apply.
The end user or installer shall ensure that this equipment
is protected against external influences which could
adversely affect the explosion protection, or contact
the manufacturer if in doubt of the suitability of this
equipment in the environment in which it is to be installed.
Ensure that all nuts, bolts and fixings are secure.
Ensure that only the correct listed or certified stopping
plugs are used to blank off unused gland entry points and
that the NEMA/IP rating of the unit is maintained. MEDC
recommend the use of a sealing compound such as
HYLOMAR PL32 on the threads of glands and stopping
plugs in order to maintain the IP rating of the unit.
The beacon is directly mounted using the 2 off Ø9mm
mounting holes in the base of the unit.
The holes have been designed to accept an M8
screw or bolt. MEDC recommend the use of stainless
steel screws.
Cable termination
CAUTION:
Before removing the cover assembly,
ensure that the power to the unit is isolated.
Cable termination should be in accordance with
specifications applying to the required application. MEDC
recommends that all cables and cores should be correctly
identified. Please refer to the wiring diagram provided
with the product.
Ensure that only the correct listed or certified cable
glands are used and that the assembly is shrouded and
correctly earthed.
All cable glands should be of an equivalent NEMA/IP
rating to that of the beacon and integrated with the unit
such that this rating is maintained.
The internal earth terminal, where fitted, must be used
for the equipment grounding connection and the external
terminal is for a supplementary bonding connection
where local codes or authorities permit or require such
a connection.
Access to terminals – Exd units:
Unscrew the 3 off M8 screws (6.0mm A/F hexagon key)
holding the cover assembly to the base. The cover screws
are captive and will be retained in the cover assembly.
Twist the cover assembly gently clockwise and
anti-clockwise, whilst pulling it away from the base.
Remove to gain access to the interior. The cover will be
remain attached to the base by means of a retention chain
Unscrew the 3 off slotted screws holding the electronics
assembly into the unit and lift the electronics assembly
clear of the unit, exposing the terminal block and internal
earth stud. The slotted screws are captive and will be
retained in the PCB mounting holes. The electronics
assembly will remain attached to the enclosure by means
of a nylon retention strap. Care must be taken to avoid
damage to the xenon tubes during cable termination.
Once termination is complete, carefully replace the
electronics assembly onto the mounting pillars and secure
with the 3 off slotted screws.
Carefully replace the cover assembly back onto the
base, avoiding damage to the mating surfaces, and
ensuring the o-ring remains correctly seated in its groove
during re-assembly. Fully tighten the 3 off M8 cover
screws (6.0mm A/F hexagon key). Ensure the required
gap (0.15mm max.) is maintained between the cover
and enclosure.
Access to terminals - Ex de units:
Unscrew the 2 x M5 retained cover screws in the cover
of the Ex e chamber (4.0mm AF hexagon key).
Remove the Ex e cover from the terminal chamber,
exposing the terminal block and the internal earth stud.
See Cable Termination.
After cable termination has been completed, the cover
can be replaced and secured with the 2 x M5 fixing
screws. Maximum torque 4NM.
3.0 Operation
The operating voltage of the unit is stated on the
unit label.
The Beacon can either be powered directly or initiated
by means of a telephone ringing signal or remote
24Vdc supply via a relay if specified when ordering. See
documentation supplied with the beacon for confirmation
of initiation method.
