EBYTE CAN FD Converter Series : EID091-A101 & EID091-A601

Introduction: What Is a CAN FD Converter?

In industrial automation, automotive electronics and robotics, the CAN (Controller Area Network) bus has long been the core fieldbus connecting electronic control units (ECUs), thanks to its high reliability, real-time performance and flexibility. However, as automotive electronics and industrial control demand higher data bandwidth and real-time performance, classic CAN 2.0 — with a maximum rate of 1 Mbps and an 8-byte payload — has become a bottleneck.

CAN FD (CAN with Flexible Data-Rate) was created to solve this. It keeps the core strengths of CAN while raising the data-phase rate to up to 5 Mbps and extending the single-frame payload to 64 bytes, dramatically boosting throughput and efficiency.

To seamlessly convert CAN FD bus data to other mainstream industrial interfaces (such as RS485 and Ethernet), Chengdu EBYTE Electronic Technology Co., Ltd. has launched the EID091 series, including EID091-A101/A101-S (CAN FD to RS485) and EID091-A601/A601-S (CAN FD to Ethernet), providing flexible, efficient and reliable interface conversion for industrial sites.

Who It's For

The EID091 series serves four core user groups, precisely solving their rigid needs:

User	Typical profile	Core pain point	How EID091 helps
Industrial automation engineers	System integrators, PLC engineers	Need to connect CAN FD devices (servos, sensors) to legacy RS485 devices or Ethernet monitoring	CAN FD to RS485 or CAN FD to Ethernet hardware conversion for interop between different bus protocols
Automotive electronics test engineers	OEMs, Tier 1 suppliers	Need to stream vehicle CAN FD network data to PC analysis software or other test devices in real time	Supports UDP/TCP; packages data and sends over Ethernet to a host for acquisition, analysis and logging
IoT gateway developers	IoT solution providers, integrators	Need to bring CAN FD device data into Ethernet or RS485 networks for cloud/other-system integration	Multiple working modes (transparent, Modbus conversion, etc.) so developers ignore low-level protocol details and integrate quickly
Field maintenance engineers	After-sales, O&M	Need fast deployment, simple setup, long-term stable operation in harsh environments	Industrial wide temperature (-40℃~85℃), wide voltage (DC 8~28V), simple config (AT commands/host), plug-and-play

Product Overview

EID091-A101 & EID091-A101-S (CAN FD to RS485)

The EID091-A101/A101-S are EBYTE's self-developed CAN FD to RS485 devices. They run on DC 8–28V, support ISO and Bosch CAN FD protocols, are compatible with CAN 2.0 A/B, offer five working modes, and use spring terminals for fast wiring.

Version difference:

EID091-A101: isolated version, stronger noise immunity and electrical isolation, for high-reliability industrial environments.
EID091-A101-S: non-isolated version, lower cost, for cost-sensitive, low-interference applications.

EID091-A601 & EID091-A601-S (CAN FD to Ethernet)

The EID091-A601/A601-S are EBYTE's self-developed CAN FD to Ethernet devices. They run on DC 8–28V, support ISO and Bosch CAN FD protocols, are compatible with CAN 2.0 A/B, have a built-in 120Ω resistor (enable via host software), and offer 3 CAN FD interfaces and 1 RJ45 Ethernet interface supporting TCP/UDP for easy CAN(FD)-to-Ethernet networking.

Version difference:

EID091-A601: isolated version, stronger noise immunity and electrical isolation.
EID091-A601-S: non-isolated version, lower cost.

Features & Model Comparison

Core Feature Comparison

Feature	EID091-A101 / A101-S	EID091-A601 / A601-S
Conversion type	CAN FD ↔ RS485	CAN FD ↔ Ethernet (RJ45)
CAN FD interfaces	1	3
RS485 interface	1 (A/B/G)	None
Ethernet interface	None	1 (RJ45, 10/100Mbps)
Working modes	Five: transparent, transparent-with-ID, protocol, Modbus conversion, custom protocol	Four: TCP Client, TCP Server, UDP Client, UDP Server
Special features	frame filtering, custom baud rate, factory reset	relay function, controllable termination, heartbeat, registration packet, short connection, timeout restart, error indicator
Configuration	AT commands + host web page + host protocol	serial-frame and CAN(FD) message conversion rules / unified "1B frame info + 4B frame ID + N-byte data" format
Core advantage	easy data interop between CAN FD and RS485 devices, multiple protocol conversion	three CAN FD interfaces, powerful networking, relay & redundancy for complex networks

Feature Details

EID091-A101 series — five working modes:

Transparent mode: converts the CAN(FD) data field directly to/from RS485 serial frames for "transparent" transmission.
Transparent-with-ID mode: carries the CAN(FD) message ID in the serial frame, letting users send messages with different IDs to build custom networks.
Protocol mode: converts data in a fixed byte format (13/69 bytes) including frame info, frame ID and frame data for precise frame-structure control.
Modbus conversion mode: supports standard Modbus RTU, segmenting Modbus frames and CAN(FD) messages for Modbus network interop.
Custom protocol mode: users define frame header, tail and length for maximum flexibility in special applications.

EID091-A601 series — four network modes:

TCP Client: the device actively connects to a server — for device-to-server data exchange.
TCP Server: the device acts as a server waiting for clients, supporting up to 5 clients — for LAN multi-device communication.
UDP Client: connectionless, communicates only with a designated IP/port — for high-speed data transfer where packet loss tolerance is acceptable.
UDP Server: no source-IP validation, communicates with any device — for multi-device broadcast.

EID091-A601 series — special features:

Relay function: when enabled, CAN1-received messages are forwarded to CAN2 and CAN3; CAN2 forwards only to CAN1, CAN3 only to CAN1 — for multi-CAN bus interop.
Built-in controllable termination: all three CAN channels have a built-in 120Ω resistor, software on/off, no external soldering.
Heartbeat packet: sent to the network server to keep the connection alive (TCP Client and UDP Client modes only).
Registration packet: sends identity info to the server when a network connection is established, for device identification.

Technical Parameter Comparison

Main parameter	EID091-A101/A101-S	EID091-A601/A601-S
Supply voltage	DC 8–28V	DC 8–28V (over 28V may damage)
Working current @12V	standby ~19.7mA, TX/RX ~23.7mA	see manual
CAN FD interfaces	1	3
RS485 interface	1 (1200~3Mbps)	None
Ethernet interface	None	1 (RJ45, 10/100Mbps)
Arbitration-phase baud	5K–1Mbps, default 500Kbps	5K–1Mbps, default 500Kbps
Data-phase baud	100K–5Mbps, default 2Mbps	100K–5Mbps, default 2Mbps
Operating temperature	-40℃~85℃	-40℃~85℃
Configuration	AT commands + host web page + host	web page / host
Isolated version	Yes (A101) / No (A101-S)	Yes (A601) / No (A601-S)
Termination	built-in 120Ω, enabled via hardware jumper	built-in 120Ω, enabled via software
Special features	five modes, frame filtering, custom baud	relay, heartbeat, registration, short connection, timeout restart

Application Scenarios

Industrial Fieldbus Protocol Conversion (A101 series)

Scenario: on an automated line, new servo drives use CAN FD, but the central PLC only supports RS485 Modbus.
Solution: use the EID091-A101 as a protocol-conversion gateway. Connect the CAN FD drive and PLC to the device's CAN and RS485 ports. Configure the device in Modbus conversion mode, and the PLC can control the CAN FD servo via Modbus commands.

Vehicle CAN FD Data Acquisition & Analysis (A601 series)

Scenario: in vehicle testing/diagnostics, stream vehicle CAN FD data (engine speed, vehicle speed, battery status) to PC analysis software in real time.
Solution: use the EID091-A601, connect the vehicle CAN FD bus to any CAN FD port, and link the Ethernet port to the PC. Configure the device as TCP Client or UDP; the host software receives and parses CAN FD data in a unified protocol format for real-time monitoring and logging.

Multi-Channel CAN FD Relay & Networking (A601 series)

Scenario: a large machine has multiple independent CAN FD sub-networks that need interop without compromising their independence.
Solution: use the EID091-A601's relay function. Connect three independent sub-networks to CAN1, CAN2 and CAN3. With relay enabled, CAN1 data is forwarded to CAN2 and CAN3, while CAN2/CAN3 data forwards only to CAN1 — controlled interop.

Remote CAN FD Device Monitoring (A601 series)

Scenario: outdoor or remote devices need CAN FD bus data uploaded to a cloud platform via a 4G router for remote monitoring.
Solution: use the EID091-A601, connect the CAN FD device, and link the Ethernet port to the 4G router. Configure the device as TCP Client to actively connect to the cloud server's public IP and port. The cloud server can monitor and acquire data from the remote CAN FD device via MQTT or a custom TCP protocol.

About EBYTE and Industry Advantages

Company Profile
Chengdu EBYTE Electronic Technology Co., Ltd. (EBYTE), founded in 2012, is a national high-tech enterprise integrating R&D, production and sales. Headquartered in Chengdu, with offices in Shenzhen, Guangzhou, Shanghai and Beijing, its business covers more than 100 countries and regions. It focuses on industrial IoT wireless communications: wireless modules, digital radios, industrial gateways, network I/O, industrial PCs, antennas and accessories.

Technology Philosophy
EBYTE's mission is "Making wireless communication simpler, making the IoT world smarter." It continuously invests in R&D to provide stable, reliable, high-performance and cost-effective fieldbus conversion solutions. Choosing the EID091 series means choosing a professional, reliable and efficient CAN FD interface conversion platform.

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