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Nelson Dual Point Circuit Management System, CM 2202

CM 2202 Dual Point Circuit Management System

Brand: Nelson
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Nelson Heat Trace CM 2202 dual point circuit management system is a microprocessor based digital control and monitoring system that has been specifically designed for stand-alone or networked electric heat tracing applications. 

This system provides temperature control and heater cable monitoring while communicating additional information to operations personnel such as temperature alarms, voltage and current alarms, ground fault leakage, sensor failures and communications failures.
Features
  • The circuit management system is housed in a NEMA 4X durable molded fiberglass polyester enclosure that can be wall or rack mounted. The system is provided with dual pole solid-state heater switching and is environmentally hardened for use in various pla.
  • Easy to use interface. The 2 line, 16 characters/row, alphanumeric LCD display enables the use of English language prompts for set point entry and operation. There are no cryptic codes or key press combinations to remember.
  • On/off or proportional control. The desired control mode can be easily selected via the front panel user interface.
  • Ground fault alarm and trip settings: Separate alarm and trip settings for ground fault interrupt allow alarming of developing faults prior to circuit interruption.
  • Dual RTD input: The optional second RTD can easily be configured in a variety of ways, including working with one RTD/two RTDs and high temperature cutout.
  • Programmable auto test cycle: The user can select an interval from 1 to 24 hours to have the unit automatically check the heater operating current and ground fault conditions. This allows problems to be detected and fixed before the heating system is nee.
  • Host communications: The RS-485 Modbus™ RTU communications capability is included as a standard feature. There are no expensive ""daughter boards"" or firmware updates required.
  • LCD display is 2 Line, 16 characters per row.
  • 30 A max (resistive load only) current rating with 0.1 to 40 Amp current monitoring.
  • 100 Vac to 277 Vac voltage range with 10 mA to 500 mA ground fault monitoring.

Specifications

Brand

Alarm Function

  • Temperature: High Temperature Alarm / Low Temperature Alarm. Current: Low Current Alarm / high Current Alarm. Ground Fault Current: Ground Fault Current Alarm / ground Fault Current Trip. Voltage: High Voltage Alarm / Low Voltage Alarm. Hardware: Self-Che

Alarm Output

  • Alarm: Normally Open Contacts. One DC Opto-Isolated Contact. One AC Opto-Isolated Contact. Alarm Rating: DC Contact, 30 Vdc / 100 mA Max. AC Contact: 24-277 Vac @ 0.5 A Max. Alarm Output: LED Indication

Ambient Temperature Range

  • -40° to + 40° C (-40° to +104° F), Start Up at -20° C (-4° F)

Approvals & Certifications

  • CSA Certified: Hazardous (Classified) Locations

Communications

  • Port: (1) RS-485. Protocol: Modbus RTU. Transmission Rate: up to 115 Kbps. Wiring: 2-Wire, Shielded, Twisted Pair.

Control Power

  • Power Requirement: Control Power from Heater Voltage, 110-277 Vac

CSA

  • Class I, Div. 2, Groups A, B, C, D, Class I, Zone 2, Groups IIC, Temperature Code T4 (+135° C)

Enclosure

  • NEMA Typical 4X

Environment

  • Operating Temperature: -40° to +40° C, Starting at -20° C. Conformal Coating: Boards Conformal Coated for Hostile Environments

Heater Switching

  • Configuration: Two-Pole, Dual SSR Per Phase, 800 Amp, 1 Cycle Inrush. Ratings: 100-277 Vac, 30 Amp Continuous. Line Frequency: 50 or 60 Hz Current Measurement: 0.1 to 40A 3 % ± 0.1 Amp. GF Measurement: 10 to 500 mA 5 % ± 2 mA. Voltage Measureme

Material

  • Molded Fiberglass Polyester

Measured Values

  • Temperature (Minch And, Max.

Temperature Input

  • Range: -50° to +500° C (-58° to 932° F). Accuracy: ± 2° C. Repeatability: ± 1° C. RTD: 100 ohm Platinum, 3 W RTD, (Lead Compensated up to 20 ohms). RTD Configuration: Single, Backup, Highest, Lowest, Average or High

User Interface

  • 16-Character x 2-Line LCD Alphanumeric Display. Controller Parameters Password Protected. Panel Indicators: Power/heater On. Serial Communication Active. System Failure. Process Alarm. Keypad: 9 Polyester Keys. Actual, Alarm, Program, Reset. Select Up, S

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