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.-.
3.1.8 External power supply for controller enabling
The internal power supply for control enabling can be deactivated by removing resistors R20
and R21 from module GO. An external isolated power supply (+ 24 V) can be connected via
terminal X 121: 19 (reference potential) and terminal X121 :9 of the power
supply.
3.1.9 External voltage input for storage of fault memory signals
In order to be able to store the fault
indications
even when the unit is
switched
off, a non-
stabilized voltage of + 24 V DC can be applied to terminals X111
:
11 and X 111: 15 of the
power supply
module.
The tolerance range for this external voltage is 19 V to 30 V including
ripple (see
Fig.
3.8).
UTerm. 11
s
30 V
~19V
'----------------------.t
Fig.3.B
If this function is utilized, it should be noted that each time the unit is switched off, the
±
15
V monitoring and the group fault memory w
ill
operate and produce a fault
indication
via
the relay contact at termina
ls
72,
73.1,
73.2
and 74, owing to
non-availabil ity
of the negative
electronics voltage
.
A distinction must therefore be made between the following cases:
1) The unit is switched off in the absence of a fault signal.
Consequence:
The
±
15 V monitoring and the group fault memory operate and cause
LEDs + GO-V2 and + GO-V1 to light up. The ready
signal
at terminals 72,
73.1,
73.2
and 74 disappears and a fault signal is output (see Chapter
3.2.1).
2) The unit is switched off in consequence of a fault signal.
Consequence
a:
When the unit has been
switched
off, the
±
15 V fault indication lights up
in addition to the original fault
lamp.
In this case, the
± 15 V fault
indication should be ignored.
Consequence b
:
Only the
±
15 V fault lamp and the group fault memory lamp light up
when the unit has been
tripped
.
In th
is
case, the cause of the fault lies in
the
±
15 V electronics
voltage.
SiemensAG
GWE 4621
12.9600.76Jg-101
SIMO DRIVE
Instructions
29
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