RSR ECM
Fan/Filter Unit
Installation and Operation Manual
Doc. 1788-25
©
Copyright 2018 Terra Universal Inc.
All rights reserved
Revised November 2019
Terra Universal, Inc. • TerraUniversal.com • 800 S. Raymond Ave. • Fullerton, CA 92831 • TEL: (714) 578-6000 • FAX: (714) 578-6020
3
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
•
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
6.2 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.
Control Mode DIP Switch Configurations
Manual Control Mode
DIP Switch Bank S1:
SWITCH #1 OFF
SWITCH #2 OFF
Analog Control Mode
DIP Switch Bank S1:
SWITCH #1 ON
SWITCH #2 OFF
Network Control Mode
DIP Switch Bank S1:
SWITCH #1 OFF
SWITCH #2 ON
Closed-Loop Feedback
Network Control Mode
DIP Switch Bank S1:
SWITCH #1 ON
SWITCH #2 ON
Example Addresses in Network Mode
MODBUS® Address Value = 1
DIP Switch Bank S2:
SWITCH #1 ON
MODBUS® Address Value = 21
DIP Switch Bank S2:
SWITCHES #1,3,5 ON
NOTE: Address zero should not be used as it is reserved for global commands.
NOTE: The EC Motor Control Card must be power-cycled for any address changes to
take effect.
