APC ACRD500 Installation Manual download pdf (Page 28)

InRow RD Operation and Maintenance20

Contacts

View the state of Input and output contacts

Path: Main > Configure Unit > Discrete I/O

Each cooling unit supports a user-defined input contact and a user-defined output contact. Each contact

monitors a sensor and responds to changes in the state of the sensor (open or closed).

Input State. Indicates the actual state of the input contact (open or closed). A cooling unit is On when

the state is normal and in Standby when the state is not normal.

Output State. Indicates the actual state of the output contact (open or closed). An alarm will cause the

output contact to change from the normal state.

Edit the normal state of input and output contacts

Path: Main > Configure Unit > Discrete I/O > Normal State

You can set input contacts to cause alarm conditions based on a user-defined normal state. Output

contacts can map internal alarms and events to outside devices.

Input Norm. Set the normal state of the contact (open or closed). The cooling unit changes its operating

mode to Standby when the actual state differs from the normal state.

Output Norm. Set the normal state of the contact (open or closed). If the state of an alarm or event

mapped to this contact changes from the normal state, the contact also changes state.

Outpt Src. Define the type of output source (alarm), either Any Alrm or Critical, that causes the output

to change from its normal state.

Cooling Group Configuration

The cooling group configuration settings determine which components are available and how the cooling

group should operate.

Caution: This procedure is to be performed by APC authorized personnel only. The settings

in the Cooling Group Configuration menu are defined by APC authorized personnel when

the cooling group is commissioned.

Configure the cooling group

Path: Main > Configure Group

The Configure Group menu contains settings that identify the number of cooling units installed in this

cooling group and the physical arrangement of those cooling units.

Num Units. Enter the number of cooling units in this cooling group. Up to 12 cooling units can be

joined together to work as a single cooling group.

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APC ACRD500 Installation Manual Page 28