E2S Warning Signals
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D199-00-621-IS
Issue 2
27-10-22
Sheet 6 of 15
Ingress Protection
Follow instructions according to the approvals applied.
ATEX / IECEx & UKEx Requirements Only
If a high IP (Ingress Protection) rating is required, then a
suitable sealing washer must be fitted under the cable
glands or blanking plugs. A minimum ingress protection
rating of IP6X must be maintained for installations in
explosive dust atmospheres.
For combustible dust applications, the cable entry device
and blanking elements shall be in type of explosion
protection and shall have an IP 6X rating.
NEC / CEC Requirements Only
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable
glands or blanking plugs. A minimum ingress protection
rating of IP6X must be maintained for installations in
explosive dust atmospheres.
Adapters
The STEx Beacon Range can be supplied with the following
types of adapters:
M20 to 1/2
” NPT
M20 to 3/4
” NPT
M20 to M25
It is important to note that stopping plugs cannot be fitted onto
adapters, only directly onto the M20 entries.
Any other adapters used must be suitably rated and
certified
adapters.
8) Flash Pattern Settings
8.1. Flash Rate Setting
The STExB2 beacons can produce different flash patterns as
shown in Table 4. The flash patterns are selected by operation
of the flash setting DIP switch on the PCBA (See Fig 6).
For SIL 2 operation, only the 1Hz Flash rate is approved.
Figure 6: DIP Switch Location.
Switch
Setting
S1 Mode
SIL Approved
00
1Hz (60FPM)
Yes
01
1.33Hz (80FPM)
No
10
1.5Hz (90FPM)
No
11
Double Flash
No
Table 4: Switch Positions for Flash Patterns
9) End of Line Monitoring (DC Units)
All DC units have a blocking diode fitted in their supply input
lines. An end of line monitoring diode or an end of line
monitoring resistor can be connected across the +ve and
–
ve
terminals in the flameproof chamber. If an end of line resistor
is used it must have a minimum resistance value of 3k3 ohms
and a minimum wattage of 0.5W or a minimum resistance
value of 500 ohms and a minimum wattage of 2W.
The resistor must be connected directly across the +ve and -
ve terminals as shown in the following drawing. The resistor
leads should be kept as short as possible.
Figure 7: End of Line Resistor Placement.
SIL2 line monitoring module product version: see section 19
for standard default values and product coding. See document
D191-06-621 for associated wiring diagram.
10) Interchangeable & Spare Parts
The beacon lens is interchangeable, contact European Safety
Systems Ltd for a replacement lens available in various
colours.
The guard is an integral part of the protection and must be
reassembled exactly the same way as it was disassembled.
To change the lens, unscrew the M5 socket head screws and
remove the M5 screws, M5 spring & flat washers.
Warning
–
Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
Warning
–
high-intensity light source.
Avoid looking directly at the light source for
extended periods of time.
