20
2.4.1
Alarm group
The alarm group consists of a smoke/heat differential sensor line, an RWA switch line
and an input for an external fire alarm system.
E 260 N2/N4/N8/N12
The alarm from the alarm group acts on all the ventilator groups of the RWA-Emer-
gency Power Control System.
RWA switch
A maximum of four (E 260 N2/1) or ten (E 260 N4/1 to N12/2) RWA switches of type
FT 4/24 V DC can be connected in line to the alarm group. With the exception of the
last RWA switch, remove both terminating resistors from each RWA switch.
Smoke/heat differential sensor
Optical smoke sensors of type RM 1003/24V DC or heat differential sensors of type
WM 1005/24V DC can be connected to the alarm group - either a max. total of 10 sen-
sors (E 260 N2/1 to N8/4) or a max. total of 20 sensors (E 260 N12).
Both types can be used in any combination since they have the same socket. The ter-
minating resistor, which is delivered with the RWA Emergency Power Control System
clamped in the terminal strip, has to be installed in the last socket in the line.
External fire alarm system
An external fire alarm system with a floating (potential-free) make contact can be con-
nected to the alarm group.
3
2
1
L1
PE
N
7
6
5
4
3
2
1
9
8
7
6
5
4
1
2
1
2
1
2
1
3
