E2S BExS110D-SIL Instruction manual - page 15
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European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH sales@e-2-s.com Tel: +44 (0)208 743 8880
www.e-2-s.com Fax: +44 (0)208 740 4200
Document No. D197-00-601-IS Issue F 16-06-17 Sheet 15 of 19 (15)
21) SIL 2 Hard Reset
If required to hard system reset the unit, firstly, the unit will
need to be opened, to carry out this operation see section 7.
Warning
: - Ensure that an explosive atmosphere is not
present during reset operation.
Power down the unit completely for a minimum of 30
seconds. Move the hard reset header pin (Jumper J7) to
reset position B shown. Then power the unit for a minimum of
5 seconds. Power down the unit for 30 seconds and then
move the header pin back to Position A.
The unit has been reset. Close the unit as noted in section 8.
If the hard reset does not correct the fault the unit or power
supply integrity will need further investigation.
J7 Header Pin - Postion A, Factory default position (pins 2 &
3 linked) set to normal operation.
J7 Header Pin - Postion B (pins 2 & 3 linked) set for hard
reset.
Fig 13 - Hard reset Jumper settings
22) Product Coding for Fault Resistor and
Customer EOL Resistor
The customer is able to identify the resistor values chosen on
purchase from the product code. This is represented by the
last two characters:
BEXS110D-SIL-XX
The first character denotes the value of the Fault resistor and
the second character denotes the value of the EOL resistor.
The values of resistors available are shown in table 4.
Code
Resistor Value
A
2.2 k
Ω
B
1.0
kΩ
C
1.5
kΩ
D
1.8
kΩ
E
2.7
kΩ
F
3.3
kΩ
G
3.9
kΩ
H
4.7
kΩ
J
5.6
kΩ
K
6.8
kΩ
L
8.2
kΩ
M
11
kΩ
Z
None Fitted
Table 4: Resistor values
For Example:
BEXS110D24DC-SIL-AZ
This shows a standard 24V dc S110 SIL 2 sounder with the
suggested
2.2kΩ fault resistor and no customer installed or
selectable EOL resistor.