Emerson 30-200kVA, 50 and 60 Hz Output Dry Contacts, Emergency Power Off Input, Epo-No Epo-Nc

Single Module UPS Installation

1.8.4Output Dry Contacts

There are three output dry contact relays at the X1 slot (see Figure 4 and Table 6)

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 0.5-1.5mm2(16-20AWG) stranded for maximum runs between 25 and 50m (82-164 ft.) respectively.

Figure 4 Output dry contacts and EPO wiring for firmware before M162

X1	J13			J21			J25
BFP C	BFP S	BFP O	INV C	INV S	INV O	ACF C	ACF S	ACF O

Table 6 Output dry contact relays for firmware before M162

+12V

J25

EPO-H EPO-L

X2

Position	Name	Description
J13.2	BFP_O	Bypass feedback protection relay; normally open. Closed when bypass SCR is shorted.
J13.3	BFP_S	Bypass feedback protection relay center
J13.4	BFP_C	Bypass feedback protection relay; normally closed. Open when bypass SCR is shorted.
J21.2	INV_O	Inverter mode relay; normally open. Closed when UPS is in inverter mode.
J21.3	INV_S	Inverter mode relay center
J21.4	INV_C	Inverter mode relay; normally closed. Open when UPS is in inverter mode.
J25.2	ACF_O	Main input fault relay; normally open. Closed when main input is in fault.
J25.3	ACF_S	Main input fault relay center
J25.4	ACF_C	Main input fault relay; normally closed. Open when main input is in fault.

Figure 5 EPO wiring for firmware M200 or later

J28

X2

EPO-NO EPO-NC

1.8.5Emergency Power Off Input

The UPS has an Emergency Power Off (EPO) function that operates by a button on the control panel or by a remote contact provided by the user. The EPO button is under a hinged, clear plastic shield.

The X2 slot, shown in Figure 4, is the remote EPO input interface. The EPO has an NO/NC contact point that becomes active when shorting terminals X2: 3 and 4 or open terminal connection X2: 2 and 1

If an external emergency stop facility is required, it is connected terminals X2: 1&2 or X2: 3&4 of the auxiliary terminal block (X2). It also is connected to the normally open or normally closed remote stop

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