Table 22: Remote EPO wire terminations
From remote EPO switch
To user interface terminal
block EPO in UPS
cabinet
Remarks
NO
3-4
NC
1-2
Wire jumper between 3-4
must be installed for proper
functions
5.6
Installing interface connections
91PS/93PS UPS contains a total of 5 signal input connectors for operators which
can be used for giving remote control commands to the UPS. User interface
connector TB1 can be used for these purposes. Each input is a dry relay contact
input and requires two-wire signaling. None of the inputs are pre- programmed
but need to be separately programmed by qualified service personnel.
When you use an external battery system (either the original 91PS/93PS battery
cabinet or a customer-sourced battery cabinet/rack), it is recommended to
connect the external signaling wiring for the battery breaker.
One general alarm relay output is also on the front panel. This output is either
normally open (NO) or normally closed (NC). The polarity selection is made with
a wiring connection. By default, the general alarm relay activates when a system
alarm is active, that is, any ALARM condition is active in the system. Alternatively,
it can be activated with any particular event, but this must be programmed
separately by qualified service personnel. The alarm relay is designed for signal
level (ELV or SELV) voltages only, not for utility use. For higher signaling circuit
voltage requirements, please use an industrial relay adapter in the MiniSlot.
5.6.1
Installing customer input signals interface
These inputs are located behind the UPS door, in the top section of the UPS. See
Figures 26: Communication interfaces in the 15/20 kW standard and C-model
frames
and
27: Communication interfaces in the 30/40 kW frame
for the
connector locations.
Tie points with strain relief for the communication cables are located on the right
and left side of the cable conduit.
Signal inputs can be configured to different functions. Normally these functions
are either informative or functional (for example, a remote “Go to bypass”
command).
© Eaton Corporation plc 2020. All rights reserved.
Revision: 006
Document ID: P-164000493
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Eaton 91PS/93PS UPS 8–40 kW
User’s and Installation Guide
