GE Industrial Solutions SG Series 400 & 500 Installation Guide - Manual (Page 39)

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