Terra Universal Product Manual
WhisperFlow® Fan Filter Units
©
Copyright 2021 Terra Universal Inc. All rights reserved.
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: (714) 578-6000 • FAX: (714) 578-6020
15
EC Motor Control Card
•
Operating Temperature: 0 – 40°C
•
Open-frame PCB with standoffs; Panel-mounted
•
12-24V DC Power Supply (or network power)
•
Two non-directional CAT5e/RJ45 connections for networking
•
Motor Tachometer RPM Control
Analog Control Options
•
5-10V from controlled voltage source
•
4-20mA signal from a sensor or potentiometer
•
Internal Closed-Loop Control
•
Manual Speed Adjustment
PWM Speed Command Signal
•
10V, 80Hz
TACH Motor Speed Input
•
10V @ 1mA needed switched to ground
•
Maximum 5000 RPM measured
•
Minimum 60 RPM measured
Industry Standard MODBUS® Networking
•
RTU Protocol
•
RS485 9600,8,n,1
3.5.1
Control Modes
The EC Motor Control Card offers three different control modes for operating the FFU: MODBUS® RTU networking,
0-10 VDC analog control, or manual control through an onboard potentiometer.
Manual Control Mode
:
The onboard potentiometer can be manually adjusted at the EC Motor Control Panel using a Philips-head
screwdriver. Clockwise rotation increases the motor output, and counterclockwise rotation decreases the motor
output.
Analog Control Mode
:
Two terminals located on the EC Motor Control Card are designed to receive either a 0-10 VDC demand signal or 4-
20mA sensor signal to regulate the motor output.
Network Control Mode
:
Each EC Motor Control Card in a MODBUS® network must be assigned a unique address set in
binary format
using
the eight DIP switches in the Address DIP Switch Bank.
