Product information TroxNetCom
Smoke extraction
with AS-Interface
Gebrüder Trox GmbH
Heinrich-Trox-Platz
47504 Neukirchen-Vluyn
Telephone +49 / 28 45 / 2 02- 0
Telefax
+49 / 28 45 / 2 02- 2 65
www.troxtechnik.com
e-mail trox@trox.de
PI/7/4/EN/1
Smoke extraction
In general buildings are divided into so-called safety classes,
i.e. assessed by the fire prevention office as to the magnitude
of the risk for the people who use the building.
The division into so-called safety classes, also termed SIL
(Safety Integrity Level) is performed in accordance with IEC
standard 61508.
In total there are four levels. The higher the SIL level, the
greater the risk for the people and the higher the safetyrelated requirements on the technology to be used in the
building.
In the normal case, buildings are given the classification
SIL 1 or SIL 2.
Correspondingly, the technical systems used to protect
people must be demonstrated to comply with the requirements of Safety Integrity Level 1 or 2.
The requirements to be met are described in IEC 61508
and corresponding checks can be performed by authorised
test institutes.
Here it is to be noted that the technology used must
comply with the corresponding safety class (see section 1);
this means that so-called safety relays or safety PLCs must
be used.
Considerable attention must also be paid to the power
supply for the drives, as a failure will prevent correct
function.
Due to the related high costs and wiring effort, there exists
demand for a so-called bus solution.
Smoke extraction controller with TroxNetCom
AS-Interface
Trox smoke extraction dampers in the EK-01 series with
24 Vdc actuators can be controlled via bus cables with the
aid of TroxNetCom AS-interface and AS-i safety components,
and connected to superordinate DDC/BMS systems
without problems.
Communication and control of all users takes place over
bus cables.
TroxNetCom AS-interface has been tested by TÜV and
approved up to Safety Integrity Level 2.
Smoke extraction systems are used to protect people in a
building. They must ensure that rooms and corridors are
kept free of smoke so that, in case of fire, people can leave
the building safely and the fire brigade has a clear view for
fire fighting.
Smoke extraction systems have separate fire-protected
ducts, motorised smoke extraction dampers, and smoke
extraction fans.
In the normal case, the smoke extraction dampers are
closed and the smoke extraction fan is switched off.
In case of fire, the smoke extraction fan is in operation and
the smoke extraction damper in the area where smoke is to
be extracted is opened. All other smoke extraction dampers
are not affected and remain in the closed position.
The motorised actuators for the smoke extraction dampers
are so-called 3-point drives without a safety position, i. e.
unlike fire dampers, these dampers do not move to a
defined safety position in the case of a power failure or
other fault.
The reason for this situation is that it must be ensured in
case of fire that not all smoke extraction dampers move
simultaneously to the open position, as otherwise the
performance of the smoke extraction fan will be insufficient
to free the area affected by the fire of smoke.
In the approvals for the smoke extraction dampers, it has
been defined that the control function for opening and
closing the dampers must be assured for 25 minutes during
a fire. Due to this fact, the actuator is fitted in an L 90
enclosure and the cabling must be suitable for retaining the
function.
Up to now control systems for smoke extraction dampers
were frequently of conventional design, i.e. starting from a
central control cabinet each smoke extraction damper is
wired in a star topology and controlled via corresponding
relays or contactor circuits.
System layout:
The layout comprises:
AS-i controller
AS-i power supply
24 Vdc power supply
AS-i safety monitor (1-channel) TNC-A001S
AS-i safety input module TNC-A005S
AS-i standard module AS-EM/B
The actuators do not need an external 24 Vac power supply,
but are supplied via the AS-i module AS-EM/B with 24 Vdc
from AS-i.
The actuators are connected using the 1-wire control, i. e.
one phase is always live (corresponds to damper safety
setting open or closed, depending on the system), the
second phase is switched and moves the damper to the
opposite position.
The actuators are switched via digital outputs in the AS-i
standard modules AS-EM/B.
The end positions of the smoke extraction dampers are
monitored by the AS-i safety monitor TNC-A001S. If a
data collision or a fault occurs, then, via a safe output, the
AS-i safety monitor TNC-A001S applies a signal to a digital
input in the standard module AS-EM/B and in this way
moves the smoke extraction dampers to the previously
defined safe state.
1
Design changes reserved · All rights reserved © Gebrüder Trox GmbH (3/2002)
The end positions “Open” and “Closed” for a smoke
extraction damper are switched at the AS-i safety input
module TNC-A005S. Here the normally closed contacts on
the actuator are used to provide wire break monitoring.
Product information TroxNetCom
Smoke extraction
with AS-Interface
Gebrüder Trox GmbH
Heinrich-Trox-Platz
47504 Neukirchen-Vluyn
Telephone +49 / 28 45 / 2 02- 0
Telefax
+49 / 28 45 / 2 02- 2 65
www.troxtechnik.com
e-mail trox@trox.de
PI/7/4/EN/1
A maximum of up to 15 smoke extraction dampers can be
connected to an AS-i controller.
The relationships and processes necessary for smoke
extraction can be programmed in the AS-i controller, which
is in a central location.
The facility for interfacing to superordinate DDC/BMS
systems enables all messages to be displayed and the
controller to be accessed from a superordinate level.
Advantages:
– TÜV tested, approved up to Safety Integrity Level (SIL) 2
in accordance with IEC 61508
– No additional power supply required
– Only a 2-core bus cable
– Smoke extraction control on-site in decentral controller
units
– Interfacing to superordinate DDC/BMS systems possible
– Maximum data safety up to data integrity class I3
– Global standard AS-interface IEC 62026-2
General Layout
AS-i Power supply
z. B. TNC-A1209
AS-i Safety Monitor
TNC-A001S
AS-i Controller
e. g. TNC-A1011
AS-EM/B
Safety module
TNC-A005S
AS-i Bus cable
E
End position for the smoke
extraction actuator open
and closed (normally closed
contact)
M
AS-i Safety Monitor TNC-A001S
The information transmitted over the AS-interface, that is
master call to the safe slave and response from the safe
slave, is monitored by the safety monitor and the system
placed in a safe state (e. g. movement of the smoke
extraction dampers) in the case of a break in the safety
circuit, or in the case of erroneous behaviour in the
components connected. For this purpose the safety monitor
is equipped with safe switched outputs, and enable circuits
of two-channel design.
The AS-i safety monitor is configured to suit its function in
the system using a configuration software package.
45
1.13
1.23 1.Y1
2.13 2.23
AS-i + AS-i – 1.Y2
2.Y1
2.Y2
105 x 120
AS-i
Service
1
2
I
3 1 READY
2 ON
3 OFF/FAULT CONFIG
L+
M
1.32
1.14
1.24
FE
II
2.32
2.14
2.24
2
Product information TroxNetCom
Smoke extraction
with AS-Interface
Gebrüder Trox GmbH
Heinrich-Trox-Platz
47504 Neukirchen-Vluyn
Telephone +49 / 28 45 / 2 02- 0
Telefax
+49 / 28 45 / 2 02- 2 65
www.troxtechnik.com
e-mail trox@trox.de
PI/7/4/EN/1
Technical data:
Ordering code
Operating voltage [V]
Total current consumption [mA]
Max. controller category in accordance with EN 954-1
Stop category (IEC-, EN 60204-1)
Reaction time (relay outputs) [ms]
Re-make time [ms]
Outputs:
potential-free normally open contact, max.
contact load
AS-i profile
Function indication LED
TNC-A001S
AS-i 24 DC external (± 15 %)
Typ. 150
4
0
40
100
1A DC-13 at 24 V DC
3A AC-15 at 230 V AC
7.F
ASi 1 red bus error AS-i system
ASi 2 green AS-i system voltage present
Ready yellow startup active
ON green output relay on
OFF red output relay off
EN 50081-1
EN 50082-2
IP 20
– 20 . . . + 60
PA 6.6
105 x 45 x 120
DIN rail mounting possible
EMC: Radiation of interference
EMC: Noise immunity
Type of protection
Ambient temperature [°C]
Housing material
Housing dimensions (H x W x D) [mm]
Mounting
AS-i safety input module TNC-A005S
The AS-i safety input module is suitable for safety-related
applications up to control category 4 in accordance with
EN 954-1. It is used for the connection of mechanical
contacts or electronic sensors (e. g. end position sampling
on smoke extraction dampers). The chain for the safe
transmission of signals is closed in conjunction with the
safety monitor.
27
45
25
80
3
Product information TroxNetCom
Smoke extraction
with AS-Interface
Gebrüder Trox GmbH
Heinrich-Trox-Platz
47504 Neukirchen-Vluyn
Telephone +49 / 28 45 / 2 02- 0
Telefax
+49 / 28 45 / 2 02- 2 65
www.troxtechnik.com
e-mail trox@trox.de
PI/7/4/EN/1
Technical data:
Ordering code
Electrical design
Operating voltage [V]
Current consumption [mA]
Controller category in accordance with EN 954-1
AS-i specification
AS-i profile
Cross connection monitoring
EMC: Radiation of interference
EMC: Noise immunity
Type of protection
Ambient temperature [°C]
Indication of AS-i voltage
Input indicator
Addressing
Housing dimensions (H x W x D) [mm]
Mounting
TNC-A005S
2 inputs
26.5 . . . 31.6 DC
Typ. 80, max. 200 depending on sensor
4
V2.1
S-7.B.1
yes
EN 50081-1
EN 50082-2
IP 67
– 20 . . . + 60
green LED
yellow LED
Using addressing socket
80 x 45 x 24
DIN rail mounting possible
More detailed information on the TroxNetCom
AS-interface, e.g.
–
–
–
–
General layout of the AS-Interface
AS-i controller
24 Vdc and AS-i power supplies
Possible methods of interfacing to superordinate
DDC/BMS systems
– Other AS-i components
– etc...
is available in the TroxNetCom folder, in the Internet at
www.trox.de, www.as-interface.net, or ask one of our
consultants.
4