Y201C CAN-to-Serial Gateway Specification

Reference: Y201C Technical Manual

Y201C is a single-CAN industrial gateway for bidirectional data transfer between one CAN 2.0 A/B bus and one serial port. The model does not include Ethernet or additional CAN channels.

Contents

1. Overview
2. Ordering Information
3. Key Features
4. Technical Specifications
5. Interfaces and Indicators
6. Mechanical
7. Application Notes

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1. Overview

Y201C transfers data bidirectionally between one CAN 2.0 A/B bus and one serial port. The ordered serial variant uses RS232, RS485, or TTL. The TTL voltage level is not specified; verify it for the ordered variant before wiring. The gateway supports data-only, ID-plus-data, complete-frame, and Modbus RTU conversion modes.

Application areas include charging equipment, automotive electronics, industrial automation, fire protection, and industrial production.

Item	Description
Product Type	Industrial CAN-to-serial gateway
CAN Interface	One CAN 2.0A / CAN 2.0B channel
Serial Interface	One RS232, RS485, or TTL port, depending on the ordered variant
Supply Voltage	5 to 36 VDC
CAN Baud Rate	10 to 1000 kbps, default 100 kbps
Configuration	Configuration tool or serial AT commands

Highlights

• Bidirectional CAN-to-serial transparent transmission
• Supports CAN standard and extended frames, data frames, and remote frames
• Supports serial-to-CAN data, ID-plus-data, and complete-frame formats
• Converts validated Modbus RTU frames to segmented CAN data and reconstructs CAN data for serial output
• Built-in 120 Ω CAN termination with switch configuration
• Eight configurable CAN filters for the single CAN channel
• Serial and CAN heartbeat packets for link and device monitoring
• 5 to 36 VDC industrial power input with reverse-polarity protection
• Hardware watchdog, serial firmware upgrade, and backup-parameter recovery

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2. Ordering Information

2.1 Model Configuration

Y201C is a single-CAN gateway. Select the serial electrical interface when ordering:

• RS232 for point-to-point serial devices
• RS485 for differential multi-drop buses
• TTL for embedded controller connections; check the voltage level for the ordered variant

Each unit has one serial electrical interface. It does not expose all three interfaces at the same time.

2.2 Configuration

Model	Serial Interface	Description
Y201C	RS232 / RS485 / TTL	Single-CAN gateway with serial AT configuration and bidirectional CAN-to-serial transfer

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3. Key Features

1. CAN 2.0 A/B Frames: Standard and extended frames, data frames, and remote frames.
2. Bidirectional Transfer: Moves data between the CAN bus and the ordered serial interface.
3. Frame Formats: Data-only, ID-plus-data, and complete-frame serial formats.
4. Modbus Conversion: Converts valid Modbus RTU traffic to segmented CAN data without acting as a Modbus master or slave.
5. CAN Filtering: Eight independent filters for the single CAN channel, with frame-format, ID, and mask conditions.
6. CAN Tools: Configurable CAN heartbeat frames, loopback testing, and packet splitting.
7. Serial Configuration: Configurable baud rate, parity, data bits, stop bits, packetization, and serial heartbeat.
8. Maintenance: Configuration tool, serial AT commands, firmware upgrade, backup parameters, and factory reset.

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4. Technical Specifications

4.1 Electrical and Environmental

Parameter	Specification
Supply Voltage	5 to 36 VDC
Power Connector	Pluggable terminal block
Operating Current	60 mA average at 12 V
Operating Temperature	-40 to 85 °C
Operating Humidity	5 to 95% RH
Reverse-Polarity Protection	Supported

4.2 CAN Specifications

Parameter	Specification
CAN Channels	One
Protocol	CAN 2.0A / CAN 2.0B
Frame Types	Standard / extended; data / remote
Baud Rate	10 to 1000 kbps, default 100 kbps
Common Baud Rates	10, 20, 50, 100, 125, 250, 500, 800, and 1000 kbps
Transmit Capacity	Up to 8000 frames/s per channel
Receive Capacity	Up to 8000 frames/s per channel
CAN Buffer	1000 packets per channel
Termination	Built-in 120 Ω, switch configurable
CAN Working Modes	Normal / loopback
CAN Filters	Eight per channel

The supported rate list may differ by firmware. Query the target firmware before using 800 kbps.

4.3 Serial Specifications

Parameter	Specification
Interface Type	RS232, RS485, or TTL, depending on the ordered variant; verify the TTL voltage before wiring
Working Modes	AT command mode / transparent mode, transparent mode by default
Baud Rate	1200 to 460800 bps, default 115200; some firmware reports a lower limit of 2400 bps
Parity	NONE / ODD / EVEN, default NONE
Data Bits	7 / 8, default 8
Stop Bits	1 / 2, default 1
Hardware Flow Control	NFC or 485; NFC is the AT-command default

Query the target firmware before using 1200 bps.

4.4 Data and Maintenance Functions

Item	Specification
Serial Packet Interval	1 to 300 ms, default 5 ms
Serial Packet Length	1 to 1024 bytes, default 1024; some firmware reports 64 to 1460 bytes, default 1460
Modbus RTU Frame Length	Up to 219 bytes
Serial Heartbeat Interval	1 to 86400 s, default 60 s
Serial Heartbeat Data	User-defined hexadecimal string, 2 to 64 bytes
CAN Heartbeat Interval	10 to 86400000 ms, default 60000 ms
CAN Heartbeat Data	User-defined hexadecimal string, 2 to 16 bytes
Firmware Upgrade	Serial upgrade through the Reload button and configuration tool

Use the range reported by the configuration tool or the target firmware's AT+UARTTL1=? response during commissioning.

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5. Interfaces and Indicators

5.1 Hardware Interfaces

Interface	Port / Label	Description
Power Input	+ / -	5 to 36 VDC input
Serial Port	TX / A	RS232/TTL transmit or RS485 A
Serial Port	RX / B	RS232/TTL receive or RS485 B
Serial Ground	GND	Serial signal ground
CAN Port	L	CAN differential negative
CAN Port	G	CAN signal ground
CAN Port	H	CAN differential positive
Reload Button	Reload	Hold for 3 to 15 s; behavior is firmware-dependent. AT+RSTCFG restores backup parameters and AT+CLRCFG performs a full factory reset
Termination Switch	1 / 2	Switches the built-in 120 Ω termination; use the switch assigned to the populated CAN channel
Chassis Ground	Grounding screw	Chassis and installation grounding

For RS485, connect A to A and B to B. For RS232 or TTL, connect TX to the peer RX, RX to the peer TX, and GND to GND.

5.2 LEDs and Status

Indicator	Meaning
POWER	Steady on when the device is powered normally
WORK	Blinks once per second during normal operation; fast blinking indicates serial upgrade mode
UART TX	Serial data transmission indicator
UART RX	Serial data reception indicator
CAN1	CAN data activity indicator
CAN1 ERR	CAN error indicator

5.3 CAN Termination

The gateway provides built-in 120 Ω termination. Enable termination only when the device is installed at a CAN-bus termination point. Keep it disabled when another termination resistor already serves that position.

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6. Mechanical

Parameter	Specification
Overall Dimensions	74 x 30 x 23 mm, excluding mounting tabs
Dimension Drawing Reference	Body height 74.25 mm, body width 22.60 mm, mounting-tab width 30 mm; the drawing also labels a 15.60 mm depth

Check the complete terminal and mounting envelope against the mechanical drawing and the final unit before preparing a panel cutout.

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7. Application Notes

• CAN-to-serial transparent transfer: Set the CAN channel target to UART, select DATA, ID_DATA, or FRAME, and configure the output frame parameters.
• Modbus RTU over CAN: Select MODBUS mode when the serial side carries validated Modbus RTU frames. The gateway performs protocol validation and forwarding; it does not poll as a Modbus master or respond as a Modbus slave.
• Selective CAN reception: Enable one or more of the eight filters when the bus carries unrelated node traffic.
• CAN link testing: Enable loopback for bench testing, then disable it before connecting the gateway to a live bus.
• Heartbeat monitoring: Use serial or CAN heartbeat packets when the host needs periodic link-status or query traffic.

For wiring, AT commands, data formats, and commissioning examples, see the Y201C Technical Manual.

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• Manufacturer: Hunan YenGear Tech Co., Ltd.
• Address: Room 21014, Building 1, Fudi Xingguang Tiandi, Yingxin Road, Yuhua District, Changsha, Hunan, China
• Email: [email protected]
• Website: www.yengear.com