Emerson 540VDC manual Appendix C.3 VIB Operation

Versatile Interface Board

Appendix C.2.5 VIB Connections

The VIB is supplied with removable screw-terminal connectors to allow for easy integration Figure 119. The user must supply the wire as specified below to make the connections to the VIB connectors.

•Wire gauge: 12-24 AWG

•Stripped length: 0.125" - 0.250"

•Tightening torque: 4.4 inch-pounds (maximum)

Figure 119 VIB screw terminal connections

Appendix C.3 VIB Operation

Upon Initial System Startup of the Liebert FS by a Liebert-certified service technician, your VIB will be operational. There is nothing to turn on or configure. Make sure that all external connections to the VIB are made with the Liebert FS power off. Making connections while power is applied may have undesirable effects and may damage the equipment.

Appendix C.3.1 VIB Operational States

The operational status of the VIB is indicated on the main screen of the Display Panel. There are three possible states: “Enabled”, “Disabled” and “Not Available”. They are indicated on the Display Panel by “1,” “0” or “NA,” respectively.

“Enabled” State

If the VIB is detected when the system is powered-up or rebooted, it will automatically be enabled. If for any reason the VIB has been disabled, it can be re-enabled by pressing F6 (Setup Parameters), then F3 (UIB Enable). While the VIB is enabled, the “Start,” “Stop” and “Clear Fault” buttons will not be visible on the Display Panel. To control the Liebert FS from the Display Panel, the VIB must first be disabled.

“Disabled” State

If the VIB is not detected when the system is powered-up or rebooted, it will automatically be dis- abled. At any time during operation the VIB can be disabled by pressing F6 (Setup Parameters), then F3 (UIB Disable). When the VIB is disabled, the inputs are ignored and all outputs are turned off. Before disabling the VIB, consider how disabling the board will affect other system components.

“Not Available” State

The Liebert FS continually monitors the status of the VIB to verify that it is operating correctly. If the response from the VIB is not what is expected by the Liebert FS, “WARNING” will be displayed on the front panel.

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