E2S Warning Signals
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D210-00-651-IS
Issue 1
13-01-23
Sheet 5 of 13
11.2. Line Monitoring
On BExS110D DC units, dc reverse line monitoring can be
used if required. All DC sounders 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. If an end of line resistor is used it
must have a minimum resistance value of 3k3Ω and a
minimum power rating of 0.5 watts or a minimum resistance
val
ue of 500Ω and a minimum power rating of 2 watts.
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.
SIL2 line monitoring module product version: see section 22
for standard default values and product coding. See
document D210-06-651 for associated wiring diagram.
Fig. 6 End of Line Resistor Placement
Note that the maximum forward polarity monitoring voltage is
6V. A monitoring voltage greater than 6V may activate the
alarm horn sounder and the 2nd or 3rd stages.
12) Tone Settings
BExS110D-SIL sounders need to be set to one off the SIL 2
approved tones to work correctly with the automated sounder
check on pattern generation and signal output checks.
Default =
Tone 1
0 0 0 0 0 0
(ON = 1, OFF = 0)
Figure 7: DIP switch configuration
Refer to D210-95-651-IS Tone Table for tone selection.
Table 2 below is a summary of DC: D210-06-651 wiring
options.
12.1. Volume Control (None)
BExS110D-SIL sounder has no volume control, as the unit is
monitoring its output the volume cannot be adjusted.
13) 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
The acoustic horn is made out of ABS plastic, therefore 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.
Config.
Voltage
Configuration Description
Features
Product
Option
Identifier
1a
DC
Single Stage Configuration
•
Line monitoring
•
Negative Switching
1
1b
DC
Two or Three Stage Configuration
•
Common Positive
•
Negative Switching
1
2
DC
Two or Three Stage Configuration
•
Common Negative
•
Customer to Set Header Pins to Positive
Switching
1
Table 2: Summary of Wiring Options. See Document D210-06-651 for DC Schematic Diagrams.
