Siemens FS20 - Page 87

Planning detector lines
Collective detector line
7
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242
Building Technologies
008843_v_en_
--
Fire Safety
2015
-
12
-
15
The table below contains an overview of the detector systems and line types
supported
Detector system Line types
EOL Transzorb diode
20 V
EOL22 (Ex) 3.3 kΩ
(grey zone)
4.7 kΩ
(grey zone)
MS7, MS9, MS24 --
1
-- -- ---
DS11 -- -- -- --
SynoLINE600 -- -- -- --
SYGMACON (SIGMASYS
GT)
--
1
-- -- --
Sinteso (multi-protocol) -- -- -- --
Connection of Ex devices DC1192/SB3 DC1192/SB3 DC1192/SB3 DC1192/SB3
Characteristics of end-of-
line
20 V ±5 %, impulse
power 1.5 kW
-- 3.3 kΩ ±2 %,
(max. ±5 %)
4.7 kΩ ±2 %,
(max. ±5 %)
Line characteristics R
L
<150 Ω
C
L
<300 nF
C
L
with detector
4.5 µF L
L
<5 mH
R
L
<250 Ω
C
L
<300 nF
C
L
with detector
4.5 µF L
L
<5 mH
R
L
<250 Ω
C
L
<300 nF
C
L
with detector
4.5 µF L
L
<5 mH
R
L
<250 Ω
C
L
<300 nF
C
L
with detector
4.5 µF L
L
<5 mH
Order no. End-of-line 4600510001 5162220001 -- --
1
Exceptions and information relating to individual detector types can be found in
the List of compatibility.
NOTICE
Incorrect selection of the '
Collective line type
'
Damage to the detector, particularly when using the EOL transzorb diode 20 V
●
Select the correct '
Collective line type
'.
You will find detailed information about commissioning in document
009052
.
You will find detailed information on the configuration and correct selection of the
'Collective line type' in document 009078. See chapter 'Applicable documents'.
Definition of the gray zone
The 'grey zone' is defined in relation to the EOL, performance characteristics, and
detector. The 'gray zone' arises when 3.3 kΩ or 4.7 kΩ resistors are used as the
end-of-line and the line resistance does not satisfy the specifications required
(R
L
<250 Ω).
The result of a 'gray zone' is that the ↑ line driver can no longer reliably recognize
an alarming detector as the line resistance is too high.
● Faults are not detected.
● Alarms result in an incorrect alarm message if any message is output at all.
To prevent the 'gray zone' occurring, the end-of-line element (3.3 kΩ or 4.7 kΩ)
must be replaced by an EOL22 (Ex). This makes line resistance monitoring
possible. As soon as the line resistance does not satisfy the specifications
required, a fault message appears.