Foxboro DM900WT Termination Cable Assembly

Product Summary

The DM900WT Termination Cable Assembly in the Foxboro I/A Series DCS control system typically serves as the data and signal transmission link between the Foxboro FBM (Fieldbus Module) and the Field Terminal Block (TA). It routes analog or digital signals from field pressure transmitters, flow meters, temperature sensors, control valves, and other instruments through the TA to the FBM10 or FBM15 modules within the control cabinet.

Full Details

Frequently Asked Questions

Q: What signal types does the DM900WT support?
A: It supports 4-20mA analog signals, digital (contact input) signals, and high-speed pulse counting signals.

Q: Is the DM900WT compatible with the HART protocol?
A: Yes. Its physical impedance design allows high-frequency digital AC signals from HART to be transmitted without attenuation to instrument communication.

Q: What are the differences between Rev C, Rev L, etc. versions in the DM900WT suffix? Are they interchangeable?
A: The letters represent hardware version iterations (such as material or process improvements). Their electrical pin definitions and physical interfaces are completely identical, and they are directly interchangeable provided the length is the same.

Q: What are the bending radius requirements for the DM900WT when cabling inside the cabinet?
A: Sharp bends are strictly prohibited. It is recommended to maintain a bending radius of 10-12 times or more than the cable's outer diameter to prevent breakage of the densely packed fine core wires or shielding layer.

Q: What are the consequences of pulling the DM900WT too tightly during routing?
A: Pulling it too tightly will cause the connector to be subjected to mechanical stress for a long time. When the ambient temperature changes or there is slight vibration in the field, it is very easy to cause poor contact of the internal pins.

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Application

Oil Refineries: Connects pressure and temperature transmitter signals to FBM modules for process control and interlock protection.

Ethylene Chemical Plants: Connects flow and pressure transmitter signals to FBM modules for high-speed data acquisition and process monitoring.

Thermal Power Plants: Connects valve feedback and speed sensor signals to FBM modules for load control and real-time response.

Coal Gasification & Fertilizer Plants: Connects temperature and solenoid valve signals to FBM modules for sealed, corrosion-resistant transmission.

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