Y301 Series Selector

Y301 Modbus RTU I/O Modules

Choose compact MiniLink modules for 1-2 digital points, or ControlLink modules for 2/4/8-channel DI, 10A relay outputs, optional analog inputs, and PLC / SCADA / gateway expansion.

Get Model Match and Quote Download Selection Guide

For panel builders, OEM engineers, system integrators, and buyers who need a practical Modbus I/O recommendation before ordering samples or project quantities.

1-8 DI Dry or wet contact input

0-8 DO Relay output options

0-4 AI Voltage or current sensing

5-36VDC Industrial power input

Y301 series Modbus I/O modules for cabinet, machine, building, and remote telemetry projects.

Select by I/O Count First

Use the product lineup to see the full range, then start from these four representative models for fast selection.

Compact digital

MiniLink for 1-2 points

Use Y301-110, Y301-200, or Y301-020 when the cabinet only needs a small number of digital inputs or relay outputs.

10A relay control

ControlLink for equipment switching

Use Y301-220, Y301-440, or Y301-880 when 10A SPDT relay outputs are required for valves, lights, alarms, contactors, or auxiliary control.

Sensor acquisition

Add AI only when needed

Use Y301-222 or Y301-444 for pressure, level, temperature, or other 0-10V / 0-5V / 4-20mA sensor signals.

Y301-110

MiniLink 1DI + 1DO for single alarm and actuator points.

Y301-200

MiniLink 2DI input-only module for compact status monitoring.

Y301-020

MiniLink 2DO relay module for small dual-output switching.

Y301-220

ControlLink 2DI + 2DO with 10A SPDT relay outputs.

Y301-222

ControlLink 2DI + 2DO + 2AI for compact sensor nodes.

Y301-440

ControlLink 4DI + 4DO for mid-density digital control.

Y301-444

ControlLink 4DI + 4DO + 4AI for mixed signal acquisition.

Y301-880

ControlLink 8DI + 8DO for high-density digital expansion.

Model	Series	I/O Mix	Relay Rating	Best Fit / Notes
Y301-110	MiniLink	1DI + 1DO	125VAC 0.5A / 30VDC 2A	Single alarm input plus one actuator or relay output.Ultra-compact 77 x 54 x 32 mm enclosure for small retrofit points.
Y301-220	ControlLink	2DI + 2DO	277VAC 10A / 28VDC 10A	Small equipment monitoring plus high-power relay control.Good default when both status input and relay output are needed.
Y301-444	ControlLink	4DI + 4DO + 4AI	277VAC 10A / 28VDC 10A	Process control with digital and analog acquisition.AI supports 0-10V, 0-5V, or 4-20mA in a 145 x 90 x 40 mm enclosure.
Y301-880	ControlLink	8DI + 8DO	277VAC 10A / 28VDC 10A	High-density digital expansion in one module.16-point digital I/O for larger cabinets, building automation, and telemetry systems.

Fit Checks Before You Order

These four details usually prevent the wrong module from entering the BOM.

Dry or wet contact inputs

Y301 DI channels are designed for switch, status, pulse, and sensor contact acquisition. Confirm signal voltage and common wiring.

Relay output load

MiniLink relays fit small loads. ControlLink 10A SPDT relays fit higher-power control, with protection for inductive loads.

Analog sensor type

Choose Y301-222 or Y301-444 when voltage or current-loop signals must be read at the same Modbus node.

RTU

Serial interface path

RS485 is standard for Modbus RTU networks. RS232 and TTL options support point-to-point or MCU integration on selected builds.

Where Y301 Is Usually Deployed

The same product family covers small equipment points, control panels, and higher-density Modbus expansion.

PLC / SCADA I/O Expansion

Add remote DI, relay DO, or analog signals without changing the main controller architecture.

BMS, HVAC, Pump, and Valve Control

Route equipment status and relay outputs to a local Modbus node for practical cabinet wiring.

OEM and Edge Gateway Integration

Use serial I/O near machines, telemetry boxes, or gateways that already speak Modbus RTU.

Common Selection Questions

Short answers for the decisions that usually matter in a Google Ads inquiry.

When should I choose MiniLink instead of ControlLink?

Choose MiniLink Y301-110/200/020 for 1-2 compact digital points and smaller relay loads. Choose ControlLink Y301-220/222/440/444/880 when you need 10A relay outputs, more channels, analog input, or higher-density cabinet wiring.

Which Y301 models include analog input?

Y301-222 includes 2 analog inputs. Y301-444 includes 4 analog inputs. The analog variants are intended for voltage or current sensor acquisition such as pressure, level, temperature, or process signals.

Can a relay output directly power my equipment?

The relay is a contact, not a power source. Route external load power through COM and NO or NC, observe the relay rating, and use a contactor or protection circuit for larger or inductive loads.

What should I include in the form?

Send DI / DO / AI count, load voltage and current, signal type, RS485 / RS232 / TTL preference, power supply voltage, quantity, and whether the project is a sample, pilot, retrofit, or rollout.

Request a Y301 Model Match and Quote

Use the form for samples, project quantities, OEM evaluation, or a fast engineering check before adding Y301 to your BOM.

Model scope: Y301-110, Y301-200, Y301-020, Y301-220, Y301-222, Y301-440, Y301-444, and Y301-880.
Useful details: Point count, signal type, relay load, interface, supply voltage, and target quantity.
Engineering review: We can flag analog input mode, relay rating, RS485 wiring, and DIN-rail cabinet considerations.
Docs first: Download the Y301 selection guide before submitting if you need a quick comparison.

Technical docs: Y301-110/200/020 Specs | Y301-220/222 Specs | Y301-440/444 Specs | Y301-880 Specs

Quote + Selection Review

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