4.1.3 Programmable input free contacts
Some programmable UPS functions (indicated in
Section 8.1
), can be activated by closing an external contact, if
connected, on:
X1 / 10, 21
or
J2 / 10, 23
User Input 1 (default = Not used)
X1 / 11, 22
or
J2 / 11, 24
User Input 2 (default = Emergency GEN ON)
4.1.4 Gen Set Signaling (GEN ON)
If an emergency generator set supplies the UPS in case of
Mains Failure
and the generator is considerably
unstable in frequency, it should be suitable to install the signal
“
Generator ON
”
on
X1 / 11, 22
or
J2 / 11, 24
). See
Fig. 4.1-1 / X1
and
J2.
Since the Parameter for of the reading of the Generator function is password protected, call the nearest
Service
Center
for it's activation.
When this contact closes, it changes certain (programmable) functions such as:
•
Enabling or disabling of synchronization and consequently the
Load
transfer to generator.
•
Reduction or elimination or delay of
Battery
recharging during the generator operation.
Additionally, when the
“
Generator ON
”
input contact is closed, the UPS will inhibit
eBoost™ Operation Mode
and
revert to double-conversion operation.
In a parallel system a separate NO (Normally Open) contact must be connected to each
individual unit.
4.1.5 AUX external Maintenance Bypass
If the UPS system is equipped with an external
Maintenance Bypass Switch
, it is possible to connect a
NO
(Normally
Open) voltage-free aux. contact from the
External Bypass Switch
to the programmable input
X1 / 10, 21
or
J2 / 10,
23
, making the UPS operate as if the internal switch
Q2
has closed.
This function can be activated by changing a dedicated parameter (password required).
When this
NO
(Normally Open) contact closes, the output
Inverter Contactor
K7
it is automatically opened and the
Load
transfer back to
Inverter
will be inhibited.
In a parallel system, the input on the customer interface of each unit must be connected to
a separate AUX contact of the External Maintenance Bypass Switch.
4.1.6 eBoost/IEMi control signal
The UPS operation in either
eBoost
or
IEMi
operating modes can be controlled via an
NO (Normally Open)
contact by
installing the “
eBoost/IEMi control
” signal, routed to the programmable function contacts (see
Fig. 4.1-1 / X1
and
J2
).
The Parameter for the activation of such function is password protected. Call the nearest
Service Center
for its
activation.
When this contact closes,
eBoost
or
IEMi
operation is inhibited.
This function is particularly useful for controlling
eBoost
or
IEMi
operation following critical conditions on either the
load side or the input utility, including generator operation when the “
Generator ON
” signal has not been installed.
When using the “eBoost/IEMi control” function on the programmable user relays of the
customer interface X1/J2 terminals in a parallel system, a separate NO (Normally Open)
contact must be connected to each individual unit.
4.1.7 Auxiliary Power Supply (APS) 24Vdc and Battery Breaker Release
S
G
S
_40
0-5
0
0_
U
P
S
_X
A
-X
B
_01
1
XA
2
3
4
4
2
3
1
XB
Terminals XA
1
2
3
4
SGS_400
-500_Ter
minals XA
_01
XA-1
24Vdc
XA-2
GND
XA-3
Positive
(+)
Battery Breaker Release Voltage
XA-4
Negative
(-)
Battery Breaker Release Voltage
Fig. 4.1.7-1 Terminals XA for connection 24Vdc and Battery Breaker Release
Modifications reserved
Page 39/41
OPM_SGS_ISG_M40_M50_2US_V021.doc
User Manual
SG Series 400 & 500 UL S2
