Allen Bradley 1747-FC Ferrite Collar

Product Introduction

The Allen-Bradley 1747-FC Ferrite Collar is an electromagnetic noise suppression accessory specifically designed for programmable controller systems, particularly within the SLC 500 platform. It is primarily used on RS-232 communication cables to minimize the impact of high-frequency electrical noise that can interfere with data transmission and controller operation.

In industrial environments where variable frequency drives, contactors, relays, and high-power equipment operate nearby, communication lines are often exposed to EMI and RFI disturbances. The 1747-FC ferrite collar addresses this challenge by attenuating unwanted high-frequency signals while allowing normal data communication to pass unaffected.

The device is non-intrusive, requires no configuration, and can be installed quickly by clamping it around the target cable. Its passive design ensures long-term reliability with zero maintenance, making it an effective safeguard for communication stability in automation systems.

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Product Specifications

Parameter	Description
Product Type	Ferrite Noise Suppression Collar
Controller Compatibility	SLC 500 Programmable Controllers
Intended Use	Electromagnetic and radio-frequency noise suppression
Supported Cable Type	RS-232 communication cable
Installation Method	External clamp-on mounting
Operating Principle	High-frequency noise attenuation through ferrite impedance
Material	Industrial-grade ferrite core
System Integration	Passive accessory, no configuration required
Dimensions	80 × 50 × 20 mm
Weight	0.068 kg

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Applications

• Used to suppress EMI/RFI on RS-232 communication lines in PLC systems

• Applied in SLC 500 controller cabinets operating in electrically noisy environments

• Installed on Remote I/O and communication cables to prevent data corruption

• Suitable for industrial automation panels, motor control centers, and drive systems

• Enhances communication reliability in factory automation, process control, and power systems

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Advantages

• Improves communication stability without modifying controller configuration

• Passive and maintenance-free design ensures long-term reliability

• Non-intrusive installation, no cutting or rewiring of cables required

• Effectively reduces high-frequency noise caused by switching devices

• Compact and lightweight, ideal for space-constrained control cabinets

• Supports system EMC performance and reduces intermittent faults

FAQ

1. What type of interference does the 1747-FC ferrite collar suppress?
   It suppresses high-frequency electromagnetic and radio-frequency interference that can couple into communication cables and disrupt data transmission.

2. Is the 1747-FC limited to use with SLC 500 systems only?
   While optimized for SLC 500 controllers, it can be applied to other programmable controller systems using RS-232 communication.

3. Does installing the ferrite collar affect signal quality or speed?
   No, it selectively attenuates unwanted high-frequency noise without impacting normal signal transmission.

4. Where should the ferrite collar be installed on the cable?
   It is typically installed close to the controller or communication module where noise sensitivity is highest.

5. Can multiple ferrite collars be used on a single cable?
   Yes, in high-noise environments multiple collars may be installed to enhance noise suppression effectiveness.

6. Is any configuration or programming required after installation?
   No configuration or software changes are required, as the device operates passively.

7. Does the ferrite collar require grounding?
   No grounding connection is required for proper operation.

8. Can it be used in systems with variable frequency drives nearby?
   Yes, it is especially effective in environments with VFDs, contactors, and high-power switching devices.

9. Is the ferrite collar reusable after removal?
   Yes, it can be removed and reinstalled on another cable if needed.

10. Does the ferrite collar introduce any latency or delay in data transmission?
    No, it does not introduce measurable latency or affect communication timing.

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