Securiton ASD 531, Technical Description

Page: 68 / 105

Installation
68 / 105 ASD 531, Technical description, T 140 416 en
6.6 Connection variants
Notice
The connection variants are determined by the possible line and FACP technologies used. For more information
on connecting alarm transmitters, line monitoring elements, etc., please contact the manufacturer and/or supplier
of the fire alarm system.
In all cases the ASD 531 must have an emergency power supply compliant with EN 54-4.
6.6.1 Power supply
The ASD 531 must always have an emergency power supply.
Depending on the output current available at the fire alarm
control panel (FACP) and the number of ASD 531 units to be
connected, the power supply can be provided by the FACP;
alternatively, an additional power supply must be provided lo-
cally.
The supply is via terminals 1 and 2. In applications which sti-
pulate a redundant power supply line (country-specific), it is
routed to terminals 3 and 4 (
Fig. 32 ).
Notice
•
The supply inputs are not connected inter-
nally in the ASD and therefore cannot be
used for direct forwarding to neighbouring
systems.
•
The terminals of the ASD 531 are designed
for maximum 2.5 mm². For forwarding the
supply line to a neighbouring ASD it may
therefore be necessary to install additional
distributor or support terminals.
Fig. 32 Types of power supply
Danger
To determine the required power supply
and cable cross-section, the calculations
set out in Sec. 4.8.2 must be carried out in
all cases. For applications with redundant
power supply, the calculations must be per-
formed for both power supply lines indi-
vidually.
6.6.2 Reset input
The reset input is potential-free (opto-isolator) and can be ac-
tuated on both the “plus” side and the “minus” side,
Fig. 33 .
The input operates in the 5 to 30 VDC range and a pulse
bandwidth of 0.5 to 10 s. Thanks to the continuous current
consumption of approx. 3 mA across the entire operating
range, actuation can be carried out directly via an OC output.
If a continuous signal is imposed for longer than 20 s, the
ASD 531 is switched inactive, the fault relay becomes active
(triggers), and the fan is switched off. Once the continuous
signal is switched off, the ASD is re-armed. Switching inactive
via the “Reset external” input works only if the ASD 531 is not
equipped with an XLM 35.
Fig. 33 Reset input
ASD 531
1 2
3 4
ASD 531
1 2 3 4
ASD 531
1 2 3 4
ASD 531
1 2 3 4
ASD 531
1 2 3 4
ASD 531
1 2
3 4
ASD 531
1 2
3 4
Supply from FACP
Local supply, individual Local supply, by zone
redundant power supply line (optional, country-specific)
1)
1)
1)
1)
~/= ~/= ~/=
Supply from potential “A”
Reset
external
1
2
20
19
ASD 531
Reset
external
1
2
20
19
ASD 531
Reset
external
1
2
20
19
ASD 531
Reset impulse,
plus switched
from potential
“A”
Reset impulse,
or minus switched
from potential
“B”
Reset impulse,
minusswitched
from potential
“A”
plus