Terra Universal Smart WhisperFlow Installation And Operation Manual page 2

6.0 EC Motor Control Card Set-up
6.1 Overview
The EC Motor Control Card is a variable-speed controller designed for brushless DC
(BLDC), electrically-commutated (EC) motors. The control card features industry
standard MODBUS® networking, precision speed control (1-100%), and closed-loop
control capability that supports a variety of sensors such as air pressure, air flow, and
particle counts. The EC Motor Control panel provides access to LED diagnostics,
manual speed adjustment, test probe jacks, CAT5e ports, the Control Mode DIP Switch,
and the MODBUS® Address DIP Switch Bank.
EC Motor Control Card
Operating Temperature: 0 – 40°C
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Open-frame PCB with standoffs; Panel-mounted
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12-24V DC Power Supply (or network power)
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Two non-directional CAT5e/RJ45 connections for networking
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Motor Tachometer RPM Control
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Analog Control Options
5-10V from controlled voltage source
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Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: (714) 578-6000 • FAX: (714) 578-6020
ECM Fan/Filter Unit
Installation and Operation Manual
© Copyright 2018 Terra Universal Inc.
All rights reserved Revised November 2019
PWM Speed Command Signal
TACH Motor Speed Input
Industry Standard MODBUS® Networking
Doc. 1788-14
4-20mA signal from a sensor or potentiometer
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Internal Closed-Loop Control
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Manual Speed Adjustment
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10V, 80Hz
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10V @ 1mA needed switched to ground
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Maximum 5000 RPM measured
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Minimum 60 RPM measured
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RTU Protocol
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RS485 9600,8,n,1
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