Electrical Connections—UPS

3.4.2Output Dry Contacts

The Auxiliary Terminal Block has three output dry contact relays (see Figure 18 and Table 6).

Figure 18 Output dry contacts and EPO wiring

J11

BFP_C

BFP_S

BFP_O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

J12

 

 

 

 

 

 

 

J10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

INV C

 

INV S

INV O

MFP C

 

MFP S

MFP O

NOTE: The black square () on each connector indicates Pin 1. Refer to Figure 16 for the location of connectors J10, J11 and J12.

Table 6

Output dry contact relays

 

 

 

Position

Name

Description

 

 

 

J11.2

BFP_O

Bypass feedback protection relay. Normally open. Closed when bypass SCR is shorted.

 

 

 

J11.3

BFP_S

Bypass feedback protection relay center

 

 

 

J11.4

BFP_C

Bypass feedback protection relay. Normally closed. Open when bypass SCR is shorted.

 

 

 

J12.2

INV_O

Inverter mode relay. Normally open. Closed when UPS is in inverter mode.

 

 

 

J12.3

INV_S

Inverter mode relay common

 

 

 

J12.4

INV_C

Inverter mode relay. Normally closed. Open when UPS is in inverter mode.

 

 

 

J10.2

MFP_O

Main feedback protection relay. Normally open. Closed when bypass SCR is shorted.

 

 

 

J10.3

MFP_S

Main feedback protection relay common

 

 

 

J10.4

MFP_C

Main feedback protection relay. Normally closed. Open when bypass SCR is shorted.

 

 

 

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded for maximum runs between 80 and 200 feet (25-60m), respectively.

3.4.3Liebert BDC Interface

The Liebert BDC interface is on the Auxiliary Terminal Block at J5. Refer to Figure 16 for the location of connector J5 and to Figure 17 for circuit details.

Table 7 Liebert BDC interface

Position

Name

Description

 

 

 

J5.1

Q3BP

Input circuit breaker status of external Liebert BDC

 

 

 

J5.2

Q2BP

Output circuit breaker status of external Liebert BDC

 

 

 

J5.3

EXT_OUT

Input circuit breaker status of internal Liebert BDC

 

 

 

J5.4

GND

Power supply GND

 

 

 

These contacts cannot be active unless they are set via software.

NOTE

All auxiliary cables of terminal must be double-insulated. Wire should be 20-16AWG stranded for maximum runs between 80 and 200 feet (25-60m), respectively.

NOTE

Refer to Table 11 and Figure 27 for the Liebert BDC wiring.

34

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Emerson 115-208, 115-120 Output Dry Contacts, Liebert BDC Interface, Output dry contact relays, Liebert BDC interface
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