Johnson Controls 4683-TTM-1F Repeater

The Johnson Controls 4683-TTM-1F Repeater is a critical component for maintaining signal integrity across extensive N2 Trunk networks. Engineered to operate on 115V AC, this RS-485 network repeater effectively doubles the maximum allowable distance for communication, allowing signals to travel an additional 4,000 feet. It is designed to overcome physical segment limitations by enabling the addition of up to 32 additional unit loads per MS/TP bus segment. For technicians managing large-scale facility automation, this unit provides essential I/O signal isolation and electrical transient protection, shielding sensitive host controllers from destructive noise spikes. The 4683-TTM-1F supports a wide range of switch-selectable baud rates, from 600 to 76.8K, ensuring seamless integration with legacy and modern Metasys configurations. High-visibility status LEDs allow for rapid field diagnostics, indicating transmission direction and RS-485 fault conditions at a glance.

• Extended Network Reach: Boosts RS-485 signals to cover an additional 4,000 feet of cabling without data loss.
• High Device Capacity: Permits the integration of 32 more devices on a single N2 or BACnet trunk.
• Built-in Protection: Integrated transient immunity protects the communication bus from heavy industrial electrical interference.
• Simplified Diagnostics: Onboard LEDs provide real-time feedback on power status and bus faults for faster troubleshooting.
• Flexible Configuration: Features field-selectable end-of-line (EOL) terminations for both the A and B network sides.

How do I set the baud rate for the 4683-TTM-1F?
The baud rate is configured using manual internal switches. You must match the repeater's baud rate (ranging from 600 to 76,800) to your specific N2 or MS/TP supervisor setting for proper data transparent operation.

Does this repeater require a separate transformer for 115V power?
No, this specific model is designed for direct 115V AC input via a 3-screw terminal strip, making it ideal for installation in standard electrical enclosures without additional step-down transformers.

Is signal isolation provided between the network segments?
Yes, the unit provides full I/O signal isolation between the A and B sides, which helps prevent ground loops and isolates communication failures to a specific segment of the trunk.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.