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Y301 MiniLink Series User Manual ​

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

MiniLink Series are compact I/O modules for small-scale switch acquisition, simple relay control, and device integration. This manual covers installation, default parameters, interface descriptions, and basic wiring.

Product Overview ​

MiniLink Series connect to PLCs, gateways, or data loggers via serial communication using Modbus-RTU protocol. The compact size and low channel count fit space-constrained control panels or applications with minimal I/O requirements.

Key features:

  • RS485 communication standard; RS232 and TTL available on selected models.
  • Power supply range: DC 5~36V.
  • Digital inputs support both dry and wet contacts.
  • Relay outputs control valves, lights, alarms, and small actuator circuits.
  • DIN-rail or screw mounting for control panels and device integration.

Model Selection ​

ProductModelDIDORecommended Use
Y301-110Y301-11011One switch input + one device control
Y301-200Y301-20020Two-channel status acquisition
Y301-020Y301-02002Two-channel relay control

Selection guide:

  • Choose Y301-200 for two switch inputs only.
  • Choose Y301-020 for two relay outputs only.
  • Choose Y301-110 for one input and one output together.
  • For future expansion, consider ControlLink Series models with more channels.

Default Parameters ​

ParameterDefault Value
Communication protocolModbus-RTU
Device address1
Baud rate9600 bps
Data bits8
Stop bits1
ParityNone
DI debounce time50 ms
DI pulse counting modeRising edge
DO output state holdSoft reboot retention
Power supplyDC 5~36V

Notes:

  • Each device on the same RS485 bus must have a unique address.
  • Changes to device address and baud rate typically require a restart.
  • If communication fails, check the address, baud rate, A/B line polarity, and GND connection.

Hardware Interfaces ​

Interface AreaY301-110Y301-200Y301-020
PowerV+, V-V+, V-V+, V-
CommunicationA, B, GNDA, B, GNDA, B, GND
DI InputDI1, DICOMDI1~DI2, DICOMNone
DO OutputCOM1, NO1, NC1NoneCOM1~COM2, NO1~NO2, NC1~NC2
DIP SwitchSW1~SW5SW1~SW5SW1~SW5
Reload ButtonReload / ResetReload / ResetReload / Reset

DO terminal definitions:

  • COM: Common terminal.
  • NO: Normally open; disconnects from COM when relay is off, connects when on.
  • NC: Normally closed; connects to COM when relay is off, disconnects when on.

Installation and wiring notes:

  • Power off before wiring.
  • Use shielded twisted pair for communication lines. Add 120Ω termination resistors at both ends of long RS485 runs.
  • Add flyback diodes, RC snubbers, or surge protection when driving inductive loads.
  • Do not exceed relay contact ratings: AC 277V / 10A or DC 28V / 10A.

DI Wiring Diagram ​

Applicable models: Y301-110, Y301-200.

DI channels collect signals from switches, buttons, level sensors, limit switches, and other discrete sensors.

DI Wiring Diagram

Wiring notes:

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

DO Wiring Diagram ​

Applicable models: Y301-110, Y301-020.

DO channels provide relay contact outputs, commonly used to control valves, lights, alarms, and contactor coils.

DO Wiring Diagram

Wiring notes:

  • Relay contacts do not output voltage; external load power is required.
  • The typical control method routes the load power line or positive terminal through COM and NO.
  • Use COM and NC for normally-on applications.
  • For AC high-voltage loads, have a qualified electrician perform the wiring with proper insulation, protection, and fuses.

Common Applications ​

ApplicationRecommended ModelDescription
Door sensor, button, or level switch monitoringY301-200Two digital inputs
Alarm light, buzzer, or valve controlY301-020Two relay outputs
Equipment status and remote start/stopY301-110One input and one output