Y301 MiniLink Series User Manual

Applicable models: Y301-110, Y301-200, Y301-020.

• Specification | Technical Manual

Product Overview

MiniLink Series are compact I/O modules for small-scale switch acquisition and relay control. They connect via RS485 using Modbus-RTU, ideal for space-constrained panels.

Key features:

• RS485 standard; RS232 and TTL available on selected models
• DC 5~36V power supply
• Dry and wet contact DI support
• Relay outputs for valves, lights, alarms, and actuators
• DIN-rail or screw mounting

Model Selection

Product	Model	DI	DO	Recommended Use
	Y301-110	1	1	One switch input + one device control
	Y301-200	2	0	Two-channel status acquisition
	Y301-020	0	2	Two-channel relay control

Default Parameters

Parameter	Default Value
Communication protocol	Modbus-RTU
Device address	1
Baud rate	9600 bps
Data bits	8
Stop bits	1
Parity	None
Power supply	DC 5~36V

Note: Each RS485 device must have a unique address. Changes to address or baud rate require a restart. If communication fails, verify address, baud rate, A/B polarity, and GND connection.

Hardware Interfaces

Interface Area	Y301-110	Y301-200	Y301-020
Power	V+, V-	V+, V-	V+, V-
Communication	A, B, GND	A, B, GND	A, B, GND
DI Input	DI1, DICOM	DI1~DI2, DICOM	None
DO Output	COM1, NO1, NC1	None	COM1~COM2, NO1~NO2, NC1~NC2
Reload Button	Reload / Reset	Reload / Reset	Reload / Reset

DO terminal definitions:

• COM: Common
• NO: Normally open (closes when relay on)
• NC: Normally closed (opens when relay on)

Wiring precautions:

• Power off before wiring
• Use shielded twisted pair for RS485; add 120Ω termination at both ends of long runs
• Add flyback diodes, RC snubbers, or surge protection for inductive loads
• Relay rating: AC 125V / 0.5A or DC 30V / 2A

DI Wiring Diagram

Applicable models: Y301-110, Y301-200.

DI channels collect signals from switches, sensors, and contacts.

Dry Contact Input

Wet Contact Input

Wiring notes:

• Dry contact: connect switch between DI and common terminal
• Wet contact: connect DC 5~36V signal to DI and common reference to DICOM / GND
• DI channels collect signals only; they do not power external devices

DO Wiring Diagram

Applicable models: Y301-110, Y301-020.

DO channels provide relay contact outputs for valves, lights, alarms, and small actuator circuits.

Standard Load

Wiring notes:

• Relay contacts do not output voltage; external load power is required
• Standard wiring: route load power line through COM and NO
• Use COM and NC for normally-on applications
• For AC high-voltage loads, use qualified personnel and proper insulation / fuses

Common Applications

Application	Recommended Model	Description
Door sensor, button, or level switch monitoring	Y301-200	Two digital inputs
Alarm light, buzzer, or valve control	Y301-020	Two relay outputs
Equipment status and remote start/stop	Y301-110	One input and one output

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• Manufacturer: Hunan YenGear Tech Co., Ltd.
• Email: [email protected]
• Website: www.yengear.com