Emerson 240V Manuel D’Utilisation

Nfinity is able to communicate through multiple communication 

ports simultaneously. Use only Liebert-provided communication 

cards. Connect only Signal Edge Low Voltage (SELV)/Class 2 cir-

cuits when connecting to any communication port. 
There are two DB-9 COM ports available on the rear of the Nfinity.

Relay contacts are available through a DB-9F communications connector. Contact closure provides 

the following: 

These contacts are rated 48 VDC, 1 amp maximum and are compatible with Liebert MultiLink™ 

software.

Nfinity is able to communicate via Liebert proprietary protocol. This communication port can be used 

for serial communication with Liebert MultiLink software. For more detailed information, please see 

the MultiLink software documentation on the CD shipped with the Nfinity. The pin-out configuration 

of the DB-9 connector is: 

The following communication cards may be used with Nfinity:

• Intellislot OpenComms Web Card—allows 

the Nfinity to communicate intelligently with 

your Ethernet network. The OpenComms Web 

Card must be installed in port 1.

• Intellislot MultiPort4 cards—allows up to 

four client computer systems to monitor the sta-

tus of Nfinity simultaneously.

• Intellislot Relay Contacts cards—provides 

contact closures for remote monitoring of alarm 

conditions; On Battery, On Bypass, Low Battery, 

Summary Alarm, UPS Fault and On UPS 

signals.

1

Low Battery (normally open)

4

UPS shutdown in battery mode

(5-12 V DC for 1.5 sec)

5

Common

7

Low Battery (common)

8

On Battery (common)

9

On Battery (normally open)

2

Transmit Data

3

Receive Data

5

Common