ET xxxx SB Series 250V High Temperature Shielded Signal Cable for Industrial Automation

The ET xxxx SB Series is a precision-engineered high temperature shielded signal cable specifically optimized for the rigorous demands of industrial automation and robotics. While optimized for 250V control circuits, this cable is manufactured in strict accordance with the construction and material requirements of NEMA HP3 and NEMA WC27500. This ensures that every meter of wire delivers the thermal stability and electrical consistency expected in critical applications.

Constructed with high-purity PTFE (Polytetrafluoroethylene) insulation, this high temperature cable operates continuously from -90°C to +200°C, making it immune to the heat generated by servo motors and variable frequency drives (VFDs). The cable features a high-density braid of silver-plated copper, providing robust protection against electromagnetic interference (EMI) and radio frequency interference (RFI)—a common challenge in dense industrial control panels.

Available with standard extruded PTFE (ET) or flexible wrapped PTFE (AFR-ET), and offering a high-strength alloy (SCA) conductor option, this shielded signal cable is built to withstand the flexing, twisting, and vibration inherent in automated manufacturing environments.

• Built to NEMA Standards - The cable's construction, including insulation thickness and conductor stranding, follows the guidelines of NEMA HP3 and WC27500.
• Optimized for Automation: Rated for 250V AC, this cable is perfectly sized for low-voltage control circuits, sensors, and feedback loops, reducing bulk in cable carriers compared to higher voltage wires.
• Superior EMI Protection: The silver-plated copper braid shield acts as a barrier against electrical noise from motors and contactors, ensuring clean data transmission for sensitive encoders and resolvers.
• High-Temperature Resilience: Withstands extreme heat (+200°C) near heating elements or engines and cryogenic cold (-90°C), maintaining flexibility where PVC or rubber cables would crack or melt.
• Vibration-Resistant Conductors: The optional SCA (Silver Plated Copper Alloy) conductor offers high tensile strength, preventing wire fatigue and breakage in high-vibration robotic arms or moving gantries.
• Flexible Insulation Options: Standard ET (Extruded) provides a smooth surface and excellent abrasion resistance for static routing, while optional AFR-ET (Tape Wrapped) offers a thinner wall and higher flexibility for dynamic flexing applications.
• Versatile Configurations: Available in SB1 (Single core), SB2 (Twisted pairs), SB3 (Twisted triples), and SB4 (Twisted quads). Custom core counts are also available upon request to meet specific design requirements.

Industrial Robotics - In robotic arms and gantries, cables are subject to constant movement and stress. The SCA conductor option prevents breakage from metal fatigue, while the flexible AFR-ET insulation handles tight bending radii in cable carriers.

Variable Frequency Drives - VFDs generate significant electrical noise. This shielded signal cable isolates control signals from this interference, ensuring stable communication between the PLC and the drive.

Automated Test Equipment (ATE) - For test fixtures that operate at elevated temperatures, the PTFE insulation ensures the wire does not degrade or short-circuit, providing reliable data acquisition during stress testing.

Sensor Interconnects - Used for connecting 3-wire sensors (proximity, temperature, pressure) in hot environments like injection molding machines or die-casting units.

Q: Why is this cable rated for 250V instead of 600V or 1000V?

A: Most industrial control signals and sensor inputs operate at 24VDC or lower. A 250V rating allows for a thinner insulation wall, making the cable lighter, more flexible, and easier to route in tight automation panels without sacrificing safety.

Q: What is the benefit of the SCA conductor for automation?

A: SCA (Silver Plated Copper Alloy) is much stronger than standard annealed copper. In automation, where cables vibrate or flex repeatedly (like in a robot arm), SCA resists "work hardening" and breakage, significantly extending the cable's service life.

Q: Can this shielded cable be used in cable carriers (energy chains)?

A: Yes, particularly the versions with AFR-ET (Tape Wrapped) insulation and SCA conductors. These materials are designed to handle the mechanical stress and tight bends found in dynamic cable carrier applications.

Q: Is the shield effective against motor noise?

A: Yes. The silver-plated copper braid provides high coverage (90-95%) and low transfer impedance. This is highly effective at blocking the high-frequency electromagnetic interference typically emitted by servo motors and inverters.

Q: Do you offer custom cable assemblies?

A: Yes, we can cut the cable to specific lengths and apply connectors to create ready-to-install harnesses for your automation equipment.