Liebert EM User Manual

This section explains how to update the unit’s firmware.

1. The first step is to download the upgrade text file. To do this, visit Liebert’s Web site at 

 and go to the OpenComms EM section. Or contact Liebert Monitoring 

Application Support at 1-800-222-5877. The firmware upgrade files are named with the model 

name, firmware version number and the extension “.txt” as follows:

• The filename for the EM Controller is em-x.x.txt, where x.x is the firmware version number.
• The filename for the EM PDU Controller is empdu-x.x.txt, where x.x is the firmware version 

number.

• The filename for the vEM-14 Controller is vem-14-x.x.txt, where x.x is the firmware version 

number.

2. Connect the unit to your network using an Ethernet cable or crossover cable (see 2.3.2 - Connect 

3. Make sure the permission to upgrade is set to Allowed (see 5.7 - Sys Info Window).

4. Open a communications program such as HyperTerminal. 

(One way to do this in Windows is to click on the Start button, then on Programs, then 

Accessories, then Communications and finally HyperTerminal.)

5. Create a new connection in HyperTerminal. 
6. When prompted, enter a name for the new connection and click OK. This opens the Connect To 

window.

7. In the Connect To window:

a. Select TCP/IP (Winsock) as the type of connection in the Connect Using box. After TCP/IP is 

selected, the Host Address and Port Number boxes appear in the window.

b. In the Host Address box, enter the IP address of the OpenComms EM.
c. In the Port Number box, enter 3001. 

8. This should allow you to connect to the unit. The status area at the bottom left corner of the 

HyperTerminal window will display Connected and the amount of time you have been 

connected. 

9. Click the Transfer tab at the top of the HyperTerminal window, then select Send Text File. 
10. In the Send Text File window, specify the location of the firmware text file, then click Open. 

Several dots will appear across the HyperTerminal screen, indicating that it is checking for 

errors. Then it will begin downloading the file to the unit. 

11. When the download is complete, a message appears and the status area changes to 

Disconnected. At this point, you may close the HyperTerminal program by clicking on the File 

menu, then on Exit. 
If you have not saved the connection created in Step 5, a prompt message will ask whether you 

wish to do so.

12. After downloading a firmware update to the unit, you must wait about one minute before 

disconnecting power from the unit. 

When the firmware is updated, all settings except the network configuration are lost.

NOTE
Steps 4 through 11 must be done on the same network segment where the OpenComms EM is 

NOTE
The following instructions refer to the Microsoft