15.3 Flip/Flop
Operation
Two units can be mounted close to each other to form a flip-
flop operation, where the beacons will flash alternately. To
achieve this mode of operation, fit a pin header to the flip-
flop header pins on the electronics board, i.e. the two header
pins are shorted together, on one of the two beacons. The
first flash on the beacon that has the header fitted will be
delayed by ½ second. The two beacons will then flash
alternately every ½ a second.
16) Interchangeable & Spare Parts
The beacon cover is interchangeable, contact E2S Ltd for a
replacement cover available in various colours.
To change the cover, unscrew the M5 socket head screws
and remove the M5 screws, M5 spring & flat washers.
Fig. 11 Removal of cover
Remove the guard and replace the old cover with the new
cover.
Fig. 12 Changing of cover
Fit the guard back on to the cover and casting, align the
holes of the guard, cover and casting. To reattach the cover,
the fixings MUST be in the order shown in figure 12.
Fig. 13 Cover and Guard Fixtures
17) Maintenance, Overhaul & Repair
Maintenance, repair and overhaul of the equipment should
only be carried out by suitably qualified personnel in
accordance with the current relevant standards:
EN60079-19
IEC60079-19
Explosive atmospheres - Equipment repair,
overhaul and reclamation
EN 60079-17
IEC60079-17
Explosive atmospheres - Electrical
installations inspection and maintenance
To avoid a possible ELECTROSTACTIC CHARGE the unit
must only be cleaned with a damp cloth.
Units must not be opened while an explosive atmosphere is
present.
If opening the unit during maintenance operations a clean
environment must be maintained and any dust layer removed
prior to opening the unit.
Flameproof threaded joints and cemented joints are not
intended to be repaired.
Warning –
Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
Header Pins shorted
Flip / Flop Pin Header
M5x16 Hex Socket Screw
M5 Spring Washer
M5 Plain Washer
Guard
Cover
M5x16 Hex
Socket Screw
Old
Cover
New
Cover