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5.2.6 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 – Bypass Manual" has closed.
This function can be activated by changing a dedicated parameter ("Service Code" 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.
5.2.7 X1 terminal block - eBoost/IEMi control signal
The UPS operation in either eBoost or IEMi operating modes can be controlled via a NO (Normally Open) contact by
installing the "eBoost/IEMi CONTROL" signal, routed to the programmable function contacts (see Section 5.2.3).
When this contact closes, eBoost or IEMi operation mode is inhibited.
The Parameter for the activation of such function is "Service Code" protected.
Contact your ABB Service Center for its activation.
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 terminals in a Parallel System, a separate NO (Normally Open) contact
must be connected to each individual unit.
TLE Series 160 to 500 UL S2B
UPS Installation Guide / REV-A
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