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5.2.3 X1 terminal block - Gen Set Signalling (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. See Fig. 5.2-1 / X1.
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 SEM Operation
Mode and revert to double-conversion operation.
It is advised to contact your Service Center for further details.
In a Parallel System a separate NO (Normally Open) contact must be connected to
each individual unit.
5.2.4 X1 terminal block - 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, 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.
5.2.5 X1 terminal block - SEM/IEMi control signal
The UPS operation in either SEM (Super Eco Mode) or IEMi (Intelligent Energy Management integrated )
operating modes can be controlled via an NO (Normally Open) contact by installing the "SEM/IEMi
CONTROL" signal, routed to the programmable function contacts (see Section 5.2.3).
When this contact closes, SEM or IEMi operation mode is inhibited.
The Parameter for the activation of such function is password protected.
Call the nearest Service Center for its activation.
This function is particularly useful for controlling SEM 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 "SEM/IEMi control" function on the programmable user relays of
the Customer Interface X1 terminals in a Parallel System, a separate NO (Normally
Open) contact must be connected to each individual unit.
Modifications reserved
GE_UPS_ISG_TLE_SUL_40K_M15_1US_V010.docx
Critical Power
Installation Guide TLE Scalable Series 40 - 150 UL S1
Page 49/53
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