Emerson SMMC-3 manual General Information, PRE-PROGRAMMED Configuration, GA-2318, R1

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GENERAL INFORMATION

The SMMC-3 Control Panel manages snow and ice melting equipment for sidewalks, driveways, gutters, downspouts, etc. Suitable for controlling all types of heating cable systems, the SMMC-3 can monitor snow and ice accumulation in three separate zones. The SMMC-3 programming allows each zone to be controlled independently or on a priority mode basis. In the priority mode, one zone can be given priority and the other zones cannot be energized until the melting/de- icing in that zone is complete. This can reduce the loading on the system by ensuring that multiple zones are not energized simultaneously. The SMMC-3’s program allows customization of the key elements necessary for intelligent and efficient snow melting control.

The SMMC-3 can access information from three different types of moisture sensors – surface (SMPS-1), aerial (SMAS-

1)and gutter (SMGS-1) and one temperature sensor (SMTS-1). The surface, aerial and gutter sensors detect moisture from snow, ice, sleet, etc. and send appropriate signals to the SMMC-3. Similarly, the temperature sensor sends temperature data back to the SMMC-3. Independent temperature and moisture information is processed by the SMMC-3 to ensure that heating equipment will only be energized when precipitation occurs during freezing conditions. For each of the SMMC-3 control zones, up to two individual moisture sensors can be connected. However, for each zone only one of these may be a surface sensor. Each SMMC-3 must have a temperature sensor, SMTS-1, in order to function. A SMTS- 1 is included with each SMMC-3.

The SMMC-3 is housed in an enclosure suitable for commercial/industrial applications (NEMA 12) and features an LCD display, programming and associated indicator lights for operation of each zone.

The SMMC-3 is powered by 120VAC; control relays provide a 120VAC output to operate external contactors. See Fig. 1 & 2.

PRE-PROGRAMMED CONFIGURATION

The SMMC-3 Control Panel is delivered preprogrammed for a single zone system, for use with either an aerial (SMAS-1) or gutter (SMGS-1) sensor. (Note that the SMMC-3 does not distinguish between the gutter and aerial sensors). The de- energize temperature (the SMMC-3 will not energize the heating equipment when the ambient temperature is warmer than this) is pre-set to 37°F (3°C), and relay hold time (the length of time that the heating equipment will stay energized after it no longer senses the presence of ice/snow in the zone) is 3.0 hours. If the snow/ice melting system has been designed to operate in this manner, then no programming is required: simply wire as per the following instructions.

Fig.1 SMMC-3Control Panel

LCD

Programming

Buttons

Sensor Status

Lights

(on when ZONE

sensor is energized)

Manual Override

Output Relay

Buttons

Status Lights

 

 

 

 

 

 

(on when ZONE

 

 

 

heating is energized)

 

SMMC-3

 

 

 

 

ON/ OFF Switch

Access Cover

PO. Box 726 n TULSA, OK 74101 n TEL 918-627-5530 n FAX 918-641-7336 n www.nelsonheaters.com

GA-2318, R1

Sheet 3 of 15

May 2008

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Contents SMMC-3 Manual Table of Contents PRE-PROGRAMMED Configuration General InformationGA-2318, R1 Snow/ice sensor options InstallationConnection to each sensor is described below PRE-PROGRAMMED ConnectionsTo cycle system and check sensor operation System CheckBefore you energize the controller, confirm After energizing the controller, you should seeMode 1 Independent Mode 2 PriorityOperation Manual Operation Time Delay Zone 1 min.0 2.0H Max.10Outside T=-3C A1-A2-A3-P1-P2-P3-M1 Zone AssignmentMode No.1 Mode No.2 2zones 3zonesDegree C or F Ambient Off Temp. min.34 37F Max.50 Manual only M1 Error!- SMTS-1 cancel Error!- SMPS-1 CancelError Messages Symptoms Probable Cause Correction Troubleshooting GuideSMMC-3 Control Panel Access Cover Removed Temperature Aerial Snow Sensor, SMTS-1 Sensor, SMAS-1Gutter Sensor Sensor Extension Wire Specifications SpecificationsLimited Warranty and Liability

SMMC-3 specifications

Emerson SMMC-3 is a cutting-edge controller designed to enhance the efficiency and reliability of industrial automation processes. This smart motor management controller is specifically engineered to optimize the operation of motors and related systems, making it a crucial component in various industrial applications.

One of the standout features of the SMMC-3 is its advanced motor protection capabilities. It provides comprehensive protection against common motor faults such as overloads, phase failures, and short circuits. This ensures that the motors operate within safe parameters, thereby prolonging their lifespan and reducing maintenance costs. The SMMC-3 can be easily configured to meet specific application needs, making it versatile for a wide range of industries.

In addition to protection, the SMMC-3 offers real-time monitoring and diagnostics. It utilizes built-in sensing technologies to continuously monitor key motor parameters, including voltage, current, frequency, and temperature. This data is critical for predictive maintenance, allowing operators to anticipate potential issues before they escalate into costly downtime or equipment failure.

The SMMC-3 supports various communication protocols such as Modbus RTU and TCP, allowing for seamless integration into existing control systems. With its communication capabilities, users can easily access performance data remotely, facilitating better decision-making and resource management.

Another noteworthy characteristic of the SMMC-3 is its user-friendly interface. The device features an intuitive display and menu structure, making it straightforward for operators to configure settings, view performance metrics, and troubleshoot any issues. This ease of use significantly reduces training time and enhances overall operational efficiency.

Moreover, the SMMC-3 employs advanced algorithms and technologies for energy management. It helps in monitoring energy consumption, identifying inefficiencies, and providing recommendations for energy savings. This capability is increasingly important in today’s industrial environment, where reducing energy costs is a top priority.

In summary, Emerson SMMC-3 embodies state-of-the-art technologies and features that elevate motor management in industrial automation. With its robust protection mechanisms, real-time monitoring, versatile communication options, user-friendly design, and energy management capabilities, the SMMC-3 is an invaluable asset for industries striving for operational excellence and sustainability.
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