Emerson 250 Manuel D’Utilisation

When making the power connections for bottom cable entry, the recommended order of pull-

ing and installing cables is to start from the bottom connections to the top connections. The 

cables must be routed around the fault braces (see Detail in Figure 9). This is to prevent the 

cables from contacting other busbars. The recommended conduit layout is shown in Figure 7.

5. For control connection details, see 2.3 - Control Cable and Communications.

6. Close and secure the interior and exterior doors.

Based on your site’s specific needs, the UPS may require auxiliary connections to manage the battery 

system (external battery circuit breaker), communicate with a personal computer or provide alarm 

signaling to external devices or for Remote Emergency Power Off (REPO). The External Interface 

Board, arranged for this purpose, is on the rear of the operator access door.

NOTE
For a Single Input configuration, linking busbars must be installed between the bypass and 

Risk of electrical shock. Can cause injury or death.
If the load equipment will not be ready to accept power on the arrival of the commissioning 

engineer, ensure that the system output cables are safely isolated at their termination.

Risk of electrical shock. Can cause injury or death.
When connecting the cables between the battery extremities to the circuit breaker always 

connect the circuit breaker end of the cable first.

NOTE
 If fault bracing brackets were removed during installation, they MUST be replaced.

EPO 

STATUS

TB0823

BATT 

MTR OPT

LBS 

VOLTAGE

TB0826

REPO 

FORM C

TB0824

LEPO

KEY 

STATUS

TB0825

EXTERNAL 

CAN

TB0829

INT BATT 

CAN

EXT BATT 

CAN

TB0820

INV 

CNTRL

RECT 

CNTRL

BIB

MBB

BYP 

CNTRL

ON GEN

RIB IN

TB0812

TB0813

TB0816

TB0810

ACT FILT 

STATUS

MIB

MOB

TB0811

TEMP 1

TEMP 2

BATT GND FLT

MAINT BYP 

ENABLE

ACT FILT 

CNTL

TB0821

REPO