The Saab Rosemount 9240020-010, often identified by its sub-assembly PCB number 9240021-501, is a high-reliability Fieldbus Modem (SCM) module. It is a core component within the Rosemount TankRadar system, specifically designed to bridge communication between the tank gauging sensors and the control room monitoring software. This SCM module ensures the integrity of level, temperature, and pressure data across long-distance fieldbus networks, maintaining signal stability in the harsh electromagnetic environments typical of tank terminals and refineries.

 

Product Specifications

• Part Number: 9240020-010
• PCB Part Number: 9240021-501
• Model Type: E SCM (Fieldbus Modem)
• Dimensions: 160 mm x 100 mm x 25 mm
• Weight: 0.28 kg
• Country of Origin: Sweden
• Network Compatibility: Foundation Fieldbus / TRL2 Bus
• Operating Voltage: 15-30V DC (Bus powered or external)

 

Application Fields

This modem is a specialized communication interface used primarily in the oil and gas storage sector:

• Inventory Management: Connecting radar level gauges to host computers for bulk liquid measurement.
• Refinery Tank Farms: Providing robust data links for safety-critical high-level alarms.
• Marine Tank Gauging: Used on tankers and FPSOs for monitoring cargo levels.
• Chemical Storage: Interfacing specialized sensors with plant DCS systems.

 

Product Usage Instructions

1. Installation: Slide the PCB into the designated slot of the TankRadar Rex or TankRadar Pro supply unit. Ensure the card is fully seated in the backplane connector before tightening the retaining screws.
2. Addressing: Configure the Fieldbus address using the onboard DIP switches or via the configuration software before commissioning. Each modem on the segment must have a unique ID.
3. Cable Termination: Verify that the fieldbus trunk is correctly terminated with a 100-ohm resistor at both ends to prevent signal reflection and data corruption.
4. Diagnostics: Monitor the communication LEDs. A flashing RX/TX light indicates active data traffic. If the status LED is solid red, perform a power cycle or check for bus short circuits.

Common Questions & Answers

Q: Can the 9240021-501 PCB be swapped with older 9240021-4xx series boards? A: Generally, yes, but only if the firmware version on the new board is compatible with your existing TankMaster software version. Always verify the software revision level before replacement.

Q: What is the maximum distance supported by this fieldbus modem? A: Depending on the cable quality and the number of nodes, the SCM can typically support distances up to 3,000 meters using shielded twisted pair cabling.

Q: Does this board support both TRL2 and Foundation Fieldbus protocols? A: The hardware is designed to handle Rosemount-specific TRL2 modulation, but certain versions of the 9240020-010 are configured specifically for fieldbus integration. Refer to the specific suffix on your unit for confirmation.

 

Similar Recommended Models

• Saab Rosemount 9240020-001 (Supply Unit Card)
• Saab Rosemount 9240020-002 (Communication Interface)
• Saab Rosemount 9150064-903 (Processing Unit)
• Emerson Rosemount 2410 Tank Hub Controller
• Emerson Rosemount 2460 System Hub PCB