APC ACRD200 Installation Manual download pdf (Page 20)

InRow RD Fluid Cooled Operation and Maintenance12

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.

OHE Input State. Indicates the actual state of the input contact (Open or Closed) for the Outdoor Heat

Exchanger.

Edit the normal state of input and output contacts

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

The input contacts can be set to cause alarm conditions based on 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 Closed 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.

OHE In Norm. Set the normal state of the contact (Open or Closed) for the Outdoor Heat Exchanger.

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APC ACRD200 Installation Manual Page 20