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Enable Communication Protocols

Liebert

IntelliSlot

™

Unity

™

Card 10

3.0 ENABLE COMMUNICATION PROTOCOLS

The Liebert IntelliSlot Unity card will communicate with equipment and third-party systems over

these protocols:

• BACnet IP

• BACnet MSTP

• Modbus TCP

• Modbus RTU

•SNMP

•YDN23

3.1 Enable Protocols

Protocols may be enabled after a card has been installed and configured. After a protocol is enabled, it

must be configured, which requires opening that protocol’s folder (Unity>Protocols> (desired

protocol).

To enable two communication protocols:

1. Select Unity Tab > Protocols.

2. Click on Edit and enter the administrator user name and password.

3. Put a check mark (✔) in the desired protocols—Only two may be enabled; only one of the two can

use the 485 port.

4. Click Save to confirm the changes or click on Cancel to discard them.

5. Configure the protocols selected. For details, refer to 5.0 - Edit the Liebert IntelliSlot Unity

Card Configuration.

6. Restart the card (refer to 5.11 - Configuration—Unity Tab-Support Folder.

a. Select Unity Tab > Support.

b. Enable the commands.

c. Click on Restart.

NOTE

Only two of the protocols may be enabled on one card.

• Only one version of BACnet may be selected, either BACnet IP or BACnet MSTP

• Only one version of Modbus may be selected, either Modbus TCP or Modbus RTU

• Only one of the protocols can use the 485 port; choosing two 485 protocols will cause

conflicts.

NOTE

Some Building Management Systems can be configured to send continuous updates for device

setpoints, usually setting the same value. The BMS should be configured to send, on a

sustained average, no more than two writes per second to the device. This will allow the device

to catch up after a burst of updates when required while allowing other communication with

the device to proceed.

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