X-20S™ | 6 Relay, 6 Digital Input Expansion Module

$309.99

The X-20S™ adds six high-current relays and six optically isolated digital inputs to an X-400™ or X-600M™ controller. Each relay is rated for heavy-duty switching with Form-C (SPDT) contacts, while the isolated inputs provide reliable status monitoring with electrical separation from control circuits.

Connections are made through rugged screw terminal strips, ensuring secure wiring in industrial environments. Multiple X-20S™ modules or other expansions can be added via ribbon cable for scalable system growth. Typical applications include pump and fan control, equipment monitoring, and facility automation.

6 Relays

6 Digital Inputs

Expansion Module for the X-400 and X-600M

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Limit Switches, Motors, Valves, & More

The X-20S is suitable for use with controlling relatively heavy loads such as motors, solenoid valves, and lights. Switches can be connected to the X-20S’ digital inputs to locally control these loads. The digital inputs can also be used for other monitoring applications such as limit switches, security sensors, or light switches.

See All Expansion I/O

X-20S Features

  • 6 isolated relays SPDT (Form C)
  • Relay functions: On, Off, Pulse
  • Thermoplastic, UL94V-0, 3-wall, 0.375 inch pitch
  • 6 optically isolated digital inputs
  • Digital input functions:
    • Monitor State
    • Control Relays
    • Control Remote Relays
    • Count
    • Frequency
    • High Time
    • ON Time
  • 13 LEDs for outputs, inputs, and power
  • Power Supply: 9-28 VDC (24V recommended)

X-20S Master Devices

  • X-400™ | Modular I/O Controller

    X-400™ | Modular I/O Controller

     Price range: $299.99 through $399.99
    TThe X-400™ is a scalable Ethernet-based controller that supports up to 32 local expansion modules or remote ControlByWeb® devices through peer-to-peer communication, enabling systems with up to 64 I/O points. Its browser-based interface and embedded GUI logic builder provide event-driven automation for powerful turn-key solutions and seamless integration with SCADA and PLC platforms—without licensing fees.

    X-400C™ – Cellular-Enabled Model
    The X-400C™ adds a built-in cellular modem, extending the same modular control and integration capabilities to remote or distributed applications.
    • Expandable, Up to 64 I/O
    • Relays, Analog & Digital Inputs
    • Up to 16 temp sensors
    • Cellular version available
    Global Cellular Coverage. Discuss international cellular options with a sales engineer.

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  • X-600M expandable I/O controller

    X-600M™ | Web-Enabled I/O Controller

     $549.99
    The X-600M™ is ControlByWeb’s most advanced controller, built for large-scale industrial and OEM applications. Supporting up to 64 expansion modules and 1,024 I/O points, it’s engineered for high-density, complex systems.

    With an embedded logic builder, LUA scripting for advanced control, and support for multiple customizable dashboards, the X-600M™ gives engineers powerful tools for automation and visualization. Open protocol support (Modbus, SNMP, peer-to-peer) ensures seamless integration with SCADA and PLC systems, delivered without licensing fees or proprietary lock-in.
    • Expandable, Up to 1,024 I/O
    • Relays, Analog/Digital/Thermocouple Inputs
    • Up to 32 Temperature Sensors
    • GUI Dashboard

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Specifications

Power Requirements
  • Voltage: 9-28 VDC (24V recommended)*
  • Max Current: See table below for typical values at 25°C.
Power Supply All Relays OFF All Relays ON
9 VDC 20 mA 750 mA
12 VDC 16 mA 555 mA
24 VDC 12 mA 285 mA
Relay Contacts
  • Number of Relays: 6
  • Max Voltage: 277VAC, 30VDC
  • Max Current: 15A
  • Contact Type: SPDT (Form C)
  • Load Type: General Purpose
  • Contact Resistance: < 30 milliohms initial
  • Contact Material: AgSnO2
  • Electrical Life: 100K cycles (Typical)
  • Mechanical Life: 10M cycles (Typical)
  • Environmental Rating: Over voltage Category II, Pollution Degree 2
  • Relay Modes: ON/OFF or Pulse
  • Pulse Timer Duration: 0.1 to 86,400 Seconds (1-day)
Digital Inputs
  • Number of Inputs: 6
  • Type: Optically-Isolated
  • Voltage Range: 4-28VDC
  • Vin Hi (Min):
  • Vin LO (Max):
  • Current: 950uA @ 4V, 8.5mA @ 26V
  • Minimum Hold Time:
  • Input Isolation: 1500V
  • Input Functions: Asynchronous status of the digital inputs
  • Number of Counter Inputs: 6
  • Maximum Count: 32-bit
  • Max Count Rate: 200 Hz
  • Edge Trigger: Rising, Falling or Both
  • Frequency: 1 Hz min, 200 Hz max
  • High Time: Pulse width (4,194,304 seconds max)
  • On Time: Accumulated time an input is asserted (4,194,304 seconds max)
Connectors
  • Expansion Connector: Ribbon cable, 2×5-position, polarized 0.100″ pitch
  • Relays: Thermoplastic, UL94V-0, 3-wall, 0.375″ pitch
  • Inputs: PCB terminal block, screw connection, 3.81mm pitch
LED Indicators
  • Number of LEDs: 13
    • Power on
    • Relays 1-6
    • Digital Inputs 1-6
Physical
  • Size:
    • 8.60in (218.44mm) wide
    • 4.95in (125.73mm) tall
    • 2.16in (54.86mm) deep
  • Weight: 17 oz (474 g)
  • Enclosure Material: PVC
  • Enclosure Flame Rating: UL94 V1
Environmental
  • Operating Temperature: -40°F to 150°F (-40°C to 65.5°C)
  • Storage Temperature: -40°F to 185°F (-40°C to 85°C)
  • Humidity: 5-95%, non-condensing
  • Altitude: Up to 2,000m
  • Indoor use or NEMA-4 protected location
Electromagnetic Compliance
  • IEC CISPR 22, CISPR 24
  • FCC 47CFR15 (Class B)
  • EN55024 ITE Immunity (2010)
  • EN55022 Emissions (2010)
Product Safety Compliance
  • UL: E468316 61010-1 3rd Edition
  • CSA: C22.2 No. 61010-1-12 3rd Edition
  • CCN: QUYX, QUYX7 (Process Control Equipment, Electrical)

Manuals & Downloads

Users Manuals

X-20S Users Manual (PDF)

Catalog

X-20S Data Sheet (PDF)

ControlByWeb Product Catalog

Other Downloads

X-20S 3D Model (.stp)

Accessories

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For your convenience we have set up a live X-600M unit connected to several expansion modules (i.e., X-11S, X-12S, X-13S, X-15S,and X-16S). The X-20S will be connected and used similarly to these expansion modules. These expansion modules contain a variety of inputs and outputs that allow you to see how the X-600M works with its expansion modules. By clicking the links below you have full access to these live units. You can make changes to the configuration and settings through the setup pages and you can control the expansion modules’ relays, and view the current status of the inputs, and monitor temperature (X-600M & X-13S) through its dashboard page.

X-332™

Digital Input Control Page

X-600M™

Control Page Setup Pages*

*Setup page login information:

Username: admin

Password: webrelay

X-600M live demonstration setup

Live Demo With One of Our Sales Engineers

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X-600M Setup and Programming Demo

X-600M Setup

The diagrams illustrate how this demonstration is wired. The relays on all expansion modules are not connected to a load; however, you can still access and control the relays by turning them on or off through the X-600M dashboard. The X-600M is also wired to a temperature sensor, and the X-13S is connected to a thermocouple. Both sensors can be monitored on the X-600M’s dashboard. The digital input states on the X-15S only changes when a voltage is applied to the inputs. For this demonstration, we have connected one of our X-332 controllers to Input 1 on the X-15S. You can apply a voltage to this input by accessing the control page for the X-332 (Digital Input Control Page).

Important Information

  • Multiple users may be accessing this device simultaneously so the device can change while you are using it.
  • This unit will be reset to factory defaults daily at 2:30AM MST.
  • Please DO NOT change network or password settings.

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    The X-432™ is a standalone, Ethernet-based controller with 38 onboard I/O points, designed for demanding industrial and OEM applications. Its browser-based interface and embedded GUI logic builder allow engineers to configure complex event-driven automation, scheduling, and monitoring tasks—without external software or recurring licensing fees.

    Supporting open protocols including Modbus, MQTT, SNMP, and REST, the X-432™ integrates seamlessly into SCADA and PLC systems. With both local and remote control capabilities, it delivers scalable performance for applications requiring reliable, high-density I/O at the edge.
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    • 18 Digital Inputs
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400 Series Guided Demo

Self-Guided, Live Demo of our Products

SETUP PAGES

Use the Setup Page to set up I/O, change settings, and create logic with intuitive dropdown menus.

CONTROL PAGE

Use the Control Page to see I/O status and manually control relays.

*Setup page login information: Username: admin Password: webrelay

Schedule A Guided Walkthrough

Want a little extra guidance? Schedule a 15-minute guided demo with our sales engineers. They’ll show you how it works for your application.

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