2DI+2DO I/O Module

I/O Module, , , , ,
Y301-220 Modbus I/O module with 2 digital inputs and 2 relay outputs

Y301-220 2DI+2DO Modbus I/O Module

Model: Y301-220

Key Features

  • 2DI + 2DO module with SPDT relays rated 277 VAC 10 A or 28 VDC 10 A

  • Dry or wet contact input support with pulse counting and configurable debounce

  • Built-in automation engine with up to 4 local rules total, 2 per DO channel

Overview

Compact Modbus-RTU expansion module that combines two opto-isolated digital inputs with two 10A relay outputs, ideal for HVAC, lighting, and pump automation retrofits over RS485 or RS232 buses.

Key Features

  • 2DI + 2DO module with SPDT relays rated 277 VAC 10 A or 28 VDC 10 A

  • Dry or wet contact input support with pulse counting and configurable debounce

  • Built-in automation engine with up to 4 local rules total, 2 per DO channel

  • 5 to 36 VDC input with RS485 Modbus RTU by default and optional RS232 or TTL variants

Specifications

Power SupplyVoltageDC 5~36V
Typical Current150 mA @ 12V
Max Current200 mA @ 12V
Operating Temperature-40°C ~ +85°C
Digital InputsChannels2
TypeDry/wet contact, optically isolated
Voltage Range5~36V (wet mode)
Sampling Rate100 Hz
Pulse Counter32-bit, rising/falling selectable
Debounce5–255 ms (50 ms default)
Digital OutputsChannels2
TypeSPDT relays
Contact RatingAC 277V 10A / DC 28V 10A
Switching Time
Minimum LoadAC 10V 10 mA
State RetentionNone / soft reboot / power-cycle configurable
CommunicationInterfacesRS485 (default), RS232 optional
ProtocolModbus-RTU slave
Baud Rate600–230400 bps (default 9600)
Slave Address1–255 software + DIP offset 0–31
MechanicalDimensions82 × 54 × 32 mm
Mounting35 mm DIN rail or M3 screw
ProtectionIP20, UL94 V-0 enclosure

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