Moeller XControl XC600, Оборудование, инженерия и описание функций, Страница: 17 / 78

07/04 AWB2700-1428GB
Design
13
Switching supply voltage on/off
The UPS ensures that the XC600 controller is switched off properly
in the event of a power supply failure. This requires the inputs/
outputs of the UPS and the other devices to be wired as shown
below.
If the supply voltage to the UPS falls, then the PLC will be supplied
from the battery voltage. The contact “C1” in the UPS opens and
interrupts the circuit to the Power Fail input of the power supply
module. As a result, the controller initiates the PFI signal, which
then shuts down the system. The controller requires approximately
two minutes to do this.
By connecting the Battery Off input of the UPS to contact C2, the
UPS device can switch off the battery supply voltage after two
minutes. The battery is only under load for these two minutes, so
that in the event of a repeated voltage brownout it can ensure a
repeated buffering. If power is restored after two minutes, the
controller will start up again, depending on the setting of the
operating mode selector switch.
If the power voltage to the UPS is restored within two minutes,
then the sequence is different: first of all, the PLC is fed from the
battery voltage during the interruption to the UPS, until the supply
voltage is restored. Since the UPS signals the voltage interruption
to the PLC (Power Fail input) the PLC will shut down the system (2
minutes). The display will then show the message: “PFI shutdown
in progress”. When this procedure is finished, the end is signalled
by the message TURN OFF YOUR CONTROLLER” in the display.
In this case, the controller has not detected a power failure. To
start up, switch the supply voltage to the UPS system off and on
again. If the start should be performed automatically, then you
must use a delay-timer switch to increase the interruption to
longer than 2.5 minutes (
a fig. 11).
After a short-term power failure the controller will switch off after
two minutes, and then it will switch on again automatically after
2.5 minutes.
These functions were implemented by adapting the UPS device
DIP24-4,5-15 and the power supply modules of the XC600. If a
different UPS device is used, the wiring must be adapted
accordingly.
Calculating the current consumption of the modules
The XC-POW.. power supply modules provide the current (power
supply 5 V DC) for the internal XC modules and the local
XI/ON modules. As the current available is limited, it is necessary
to calculate the total current consumption when expanding the
basic unit with XC-NET or
XI/ON modules.
The basic unit consisting of a base module, power supply module,
CPU and operating module provides 2.9 A for all expansions. A
max of 1.5 A from the 2.9 A can be used for the XI/ON modules. If
more current is required due to a high number of XI/ON modules,
a bus refreshing module can be used as an additional current
source. The current consumption of the XI/ON modules can be
found in the AWB2700-1394 and AWB2700-1395
documentation.
A current of 2.9 A is available for the XC-NET modules if no XI/ON
module is connected. The current consumption must be divided
with the use of XI/ON and XC-NET modules.
Example:
An XC-NET module consumes 0.65 A. If three modules are used,
1.95 A is required. Only 0.95 A is then available to XI/ON modules
(2.9 A – 1.95 A = 0.95 A).
Figure 10 : Wiring between the UPS and the XC600 power supply
module
a XC600 (XC-POW50-UPS/XC-POW50-XION-UPS)
b UPS
1
Batt.
off
0 V
0 V
0
24 V
0
24 V
0
1 2
Power
Fail
Power
Supply
Power
Supply
3
0 V
L1 N PE
2 4 5
C1 C2
6 7 8 9 10 11 12
>
=
Battery
2 min.
UPS
Release
Figure 11 : Delayed switch-on of the power supply
a
UPS
b Delay circuit
L1
N
PE
L1
N
PE
K1T
K1T
a
XC600
b