Terra Universal Product Manual
WhisperFlow® Fan Filter Units
©
Copyright 2021 Terra Universal Inc. All rights reserved
•
Revised April 2021
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: (714) 578-6000 • FAX: (714) 578-6020
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3.5.2
Test Probe Terminals
The test probe terminals are provided on the EC Motor Control Card to measure the motor RPM or check for a PWM
signal using a multimeter.
Manual or Analog Control Modes:
To measure RPM, set the Address DIP Switches at a value greater than 1. The test probe jacks will output 0-2000
mVDC to represent motor RPM.
Example: 500 mVDC = 500 RPM
To measure demand signal, change the Address DIP Switches to the value of 0.
Note:
Changing the address will not interrupt power to the Control Card.
Network Control Mode:
In the MODBUS® network control mode, the test probe terminals will always output 0-2000 mVDC to represent motor
RPM.
Note:
Address zero should not be used for Networked Control mode as it is reserved for global commands.
Note:
The EC Motor Control Card must be power-cycled for any address changes to take effect.
