Maintaining sufficient airflow through data center HVAC plenums is critical to keeping server rooms at optimal operating temperatures. Although HVAC control systems continuously monitor and regulate airflow, additional layers of redundancy are often implemented to ensure uninterrupted cooling.
To safeguard against low-flow conditions, the SPA2 Current Alarm Trip provides reliable protection by monitoring and alarming when airflow drops below the required rate. The SPA2 comes standard with up to four SPDT alarm outputs, along with a TX option (24VDC @ 25mA) that powers the loop-powered airflow sensor, eliminating the need for a separate auxiliary 24VDC power supply. An optional 4-20mA output can be utilized to transmit real time flow rates to the building automation system.
For maximum flexibility, the SPA2 can be configured in the field using either front-panel push buttons or free PC-based software. Each alarm function supports high or low trip settings, as well as Failsafe or Non-Failsafe relay operation. Advanced features such as adjustable deadband, time delay, and latching/non-latching options allow the SPA2 to be tailored to meet virtually any process application requirement.
Key Attributes:
- Powers and Receives 4-20mA Signal from Airflow Sensor
- Relays rated 5A, 250VAC
- Field programmable with display
- Adjustable deadband and optional analog output for air flow monitoring
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