FRSA-00 ABB RS-485 Adapter Board | Modbus RTU ACS350 Communication Module

FRSA-00 ABB RS-485 Adapter Board

The FRSA-00 is an RS-485 adapter board from ABB. It supports the Modbus-RTU protocol. It works with ACS350 drives. The board gives a stable two-wire link. Install it in minutes.

Core Technical Data

• Model: FRSA-00
• Brand: ABB
• Type: RS-485 adapter board
• Protocol: Modbus-RTU
• Cable: Shielded twisted pair, 100–150 ohms impedance
• Termination: 120 ohms, built into the board
• Topology: Trunk line with allowed drop lines
• Max transfer rate: 115.2 kb/s
• Signal type: Asynchronous, half-duplex RS-485

RS-485 Bus Structure

• RS-485 uses two wires. It runs half-duplex and multipoint.
• Both the FRSA-00 and FMBA-01 support two-wire plus ground networks.
• The bus needs an applied voltage of -7 to +12 V DC.
• The ground wire ties all nodes to one common ground.
• Long networks can shift ground voltage levels.
• High ground difference plus data signal may exceed the rated voltage.
• This can cause data loss or damage the port or drive I/O.
• Follow industry standard TSB89 for correct wiring.

Installation Notes

• Use shielded twisted pair cable only.
• Keep the trunk line clean. Add drop lines with care.
• Enable the built-in 120-ohm termination at line ends.
• Connect the ground wire to one common point.
• Check voltage levels before powering the bus.
• Read TSB89 guidelines before you start.

Expert Review

The FRSA-00 is a simple, no-fuss board. Built-in termination saves time. Modbus-RTU support covers most drive networks. The wide voltage range handles tough sites. This board is a good pick for ACS350 users who need a clean RS-485 link.

Manager’s Insight

Stock this board for drive repair and retrofit jobs. It lowers wiring errors. It fits standard cabinets with no extra parts. Fast dispatch and a 12-month warranty keep downtime short.

Best Fit: Devices and Applications

• ACS350 drives with Modbus-RTU needs
• Factory automation panels
• Process control and monitoring systems
• Retrofit projects on two-wire RS-485 networks
• Multi-node drive clusters with drop lines

FAQ

Q: Which drives does the FRSA-00 fit?
A: It supports the ACS350 drive family. Check your drive model before you order.

Q: Do I need an external termination resistor?
A: No. The 120-ohm termination is built into the board. Turn it on at line ends only.

Q: What cable should I use?
A: Use shielded twisted pair cable. Keep impedance between 100 and 150 ohms.

Q: Why does my bus lose data on long runs?
A: Ground voltage can drift over distance. Bond all nodes to one common ground and check voltage levels.

Q: What are the warranty and delivery terms?
A: Each board has a 12-month warranty. We ship in 12–24 hours by FedEx, UPS, or DHL.

Buying Guide

• Confirm the ACS350 drive needs a Modbus-RTU adapter.
• Plan a trunk line layout with short drop lines.
• Buy shielded twisted pair cable with the board.
• Check the common ground path in your cabinet.
• Ask for the TSB89 wiring guide if you are new to RS-485.

Contact Information

Inquiries: sales@powergearx.com or +86 18030005825

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