8
+
-
L1
1 2 3 5
7
1
3
21 V AC
3
2
1
N
PE
GLR 9/ ..
LAD 9.1
1 2 3 4 5 6 7
9
8
}
}
}
+
GND
+24 V DC
27 V AC
+27,6 V DC
2
1
6
5
4
3
LED
T 2,5 A /
250 V
J1
J2
R.SP
PTC
L.SP
Supply
27 V AC; 1,5 A
Charging voltage
27,6 V DC (at 10K instead of
setting
2
battery pack with jumper J1
5
set)
Fuse
1
T 2,5 A / 250 V
Monitoring
yes, cyclically approx. every 25 minutes
Space requirements
55 mm
Overview of the major components and modules (cont.)
Load module LAD 9.1
Is used to create the charging voltage and for monitoring the
battery pack connection.
The load module is fed by a separate transformer coil via a
fuse
1
located on the module. A potentiometer
2
is used to set
the charging voltage. The load module monitors the battery pack
and mains connection and issues an error in case of a disruption.
The yellow LED on the load module will come on as soon as the
mains and battery pack connection is not in order. The module
will switch off the voltage supply to the ventilation control system
in case of a mains voltage failure. The sensor at the end of the
PTC cable is positioned close to the battery back (see image),
while the other end is connected to the PTC plug
3
on the load
module. If the PTC sensor measures a temperature above 0 °C
in the area of the battery pack, the charging voltage is 27,6 V.
Temperatures below 0 °C will increase the charging voltage
to 30 V. Jumper J2
4
is used to enable/disable the charging
function, while the potentiometer
6
is used to set the minimum
discharge voltage (pre-set at the factory). This requires that a
voltage of 19,2 V be applied between GND and pin 7 and that the
potentiometer
6
be set to the level where the LED is barely on/
goes out.
Description of the jumpers (plug-in jumpers)
4
+
5
J1 charging voltage
J1 set: Charging voltage setting
J1 not set: Operating status
J2 minimum discharge voltage
J2 set: Minimum discharge voltage setting
J2 not set: Operating status
Technical specifications
Trafo
PTC cable
Sensor
Connection to
screw plate
Mounting rail
Error mains/
battery pack
connection
Malfunction
Mains
Battery pack
