Honeywell SC-UCMX02 RTU2020 | Remote Terminal Unit Low Power Solar
Honeywell SC-UCMX02 RTU2020 | Remote Terminal Unit Low Power Solar - Image 2
Honeywell SC-UCMX02 RTU2020 | Remote Terminal Unit Low Power Solar - Image 3

Honeywell SC-UCMX02 RTU2020 | Remote Terminal Unit Low Power Solar

  • Model: SC-UCMX02 (RTU2020 Series)
  • Brand: Honeywell
  • Series: RTU2020 Remote Terminal Unit
  • Core Function: Designed for remote automation and control in harsh environments, suitable for oil & gas wellhead monitoring, gas flow measurement, and pump station control.
  • Product Type: Remote Terminal Unit (RTU)
  • Key Specs: Ultra-low power consumption down to 1.8W, operating temperature -40 to 75°C, built-in HART I/O, supports Modbus and DNP3 protocols.
Category: SKU: Honeywell SC-UCMX02-RTU2020

Description

Product Introduction

The Honeywell SC-UCMX02 is a core Remote Terminal Unit (RTU) from the Honeywell RTU2020 series. Specifically engineered for harsh environments in the oil and gas industry, it is perfectly suited for remote, off-grid well sites running on solar power. This unit can withstand extreme temperatures from -40 to 75°C and features local data buffering—meaning it stores critical data during communication outages and transmits it once bandwidth is restored, effectively solving the pain point of data loss in remote operations.The hardware design is highly practical, featuring a removable pluggable terminal block that makes on-site wiring incredibly efficient. Honestly, its smartest feature is the embedded HART functionality within the I/O channels. This means engineers can directly read diagnostic data from field instruments without needing to buy extra hardware. Paired with the RTU Builder programming environment (based on the IEC 61131-3 standard), it easily handles complex liquid and gas flow calculations, greatly simplifying SCADA system configuration.

Key Technical Specifications

  • Product Model: SC-UCMX02 (RTU2020 Series)
  • Core Applications: Wellhead monitoring, gas flow measurement, shutdown valve automation, pump and compressor control
  • Operating Temperature: -40 to 75°C (-40 to 167°F)
  • Power Consumption: Extremely low for its class, typically 1.8W (ideal for solar power)
  • Communication Protocols: Supports standard industrial protocols Modbus and DNP3 (can act as both Master and Slave)
  • I/O Features: Built-in HART Input/Output, no extra hardware required
  • Programming Environment: RTU Builder, compliant with IEC 61131-3 standard
  • Protection Design: Transient protection configured for every I/O and communication channel
  • Data Buffering: Supports local storage of critical data during communication interruptions
  • System Compatibility: Simplifies configuration when used with Experion PKS/SCADA

Installation & Wiring Guide

Phase 1: Preparation (Estimated time: 30 mins)

  • Safety Check: Ensure the power source at the remote site (e.g., solar controller output) is completely disconnected and post safety warning tags.
  • Tool List: Prepare a multimeter (e.g., Fluke 115), flat/Phillips screwdrivers, wire strippers, and an anti-static wrist strap.
  • Program Backup: If the old RTU is still communicating, be sure to back up the existing IEC 61131-3 control program and flow calculation logic using the RTU Builder software first.

Phase 2: Removing the Old Module (Estimated time: 20 mins)

  • Verify Power Off: Use the multimeter to double-check the power input terminals to ensure there is no residual voltage.
  • Label Wires:对照 (Refer to) the wiring diagram and use label paper to mark each signal and power wire one by one (pay special attention to the polarity of HART channels).
  • Take Photos: Take photos! Take photos! Take photos! Focus on capturing the layout of the old module’s terminal block, the grounding wire position, and the wiring sequence of the communication terminals.
  • Removal: Loosen the fixing clips and carefully pull out the old removable pluggable terminal block—avoid yanking it violently.

Phase 3: Installing the New Module (Estimated time: 40 mins)

  • ESD Protection: Put on your anti-static wrist strap and take the brand new SC-UCMX02 module out of its original packaging.
  • Configuration Replication: Check the new module’s appearance and pins for damage, and confirm the terminal block clips are intact.
  • Insert into Rack: Align the module with the mounting rail and push it in smoothly, then lock the fixing clips. Ensure there is a clear path for heat dissipation (after all, it has to run in 75°C heat).
  • Restore Wiring: Following your labels and photos, reconnect the wires one by one to the corresponding pluggable terminal block. Note that the shielding layer should ideally be grounded at a single end to reduce interference.

Phase 4: Power-Up Test (Estimated time: 1 hour)

  • Pre-Power Check: Double-check that the power supply voltage (usually DC 24V) and wiring are correct, and ensure proper grounding.
  • Indicator Check: Turn on the control power and observe the panel indicators. In a normal state, the power light should be solid, with no red fault lights blinking.
  • Download Program: Connect your laptop via the front communication port, download the previously backed-up control program, and verify the Modbus/DNP3 station ID settings.
  • Functional Verification: Simulate input signals to verify that HART devices are correctly recognized and that the local data buffering function is working.
  • Troubleshooting Tip: If HART communication is abnormal, first check if the loop resistance is within the standard range of 250-600 ohms, and verify the wiring polarity.

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