Time Activated Relay 24-Channel 5-Amp SPDT with USB Interface

Taralist USB Configuration

"Once your schedule is uploaded, the board keeps time internally and operates on its own."

USB Configuration

A computer is required to create and upload your schedule. Using the free Base Station Software, you'll build all your timing events, then transfer the schedule to the Taralist controller over USB.

Once your schedule is uploaded, the board keeps time internally and operates on its own. You can reconnect at any time to monitor activity, trigger events, or update your schedule.

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Once Configured

After your schedule is uploaded, the Taralist checks every second for event matches. When it finds one - day, time, and event conditions aligned - it fires the programmed action instantly. Everything runs from the board's onboard memory for reliable stand-alone operation.

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Mounts as a COM Port

When plugged into your computer, the Taralist appears as a standard virtual COM port, making the connection simple and reliable. Most Windows systems install the required drivers automatically, and additional driver links are available in the USB Quick Start Guide.

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ZUSB Modules

This board uses our ZUSB communications module to provide USB connectivity. The module draws power from your PC's USB port and includes a 6' USB cable.

The controller itself requires a 12V power supply (hardwired or wall-wart).

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Take Manual Control of Taralist

You may connect to the board at any time to:

• View relay status
• Manually activate relays
• Modify configuration settings
• Upload a new schedule

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Once Configured

After setup, the Taralist continuously checks its internal clock for event matches. When the current time aligns with a programmed event, that event executes automatically - no monitoring or external control required.

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Controlling Relays

Taralist relays can be used in two ways:

• Standalone Mode: Relays operate entirely from the uploaded schedule.
• PC-Controlled Mode: A connected computer can take temporary control of any relay via USB.

When PC control is active, Taralist logic waits until control is returned.

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Who's Qualified to Use the Taralist Series?

No programming knowledge required - schedules are built with Base Station Software. Simple schedules are easy for beginners, while complex event sets may require some patience and comfort with PC-based configuration.

Base Station Taralist Setup

"Run relays automatically based on your schedule"

Taralist Setup Overview

Taralist controllers are powerful, flexible, and incredibly reliable once your schedule is loaded - but setting them up is not a plug-and-play process. If you're comfortable with basic PC software, COM ports, and following on-screen prompts, you'll be fine. If not, this may not be the right product for you.

This page gives you a big-picture look at what's involved so you know what to expect before you purchase.

1. Setup Requires a Windows PC + Base Station Software

All Taralist controllers must be configured using NCD's free Base Station Software.
You'll create your schedule on your computer, upload it to the board, and the board runs that schedule on its own after that.

No coding is required, but you will be interacting with a configuration tool.

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2. You'll Need to Establish a Connection (USB, Ethernet, or WiFi)

To configure a Taralist controller, you must connect it to your PC through one of the supported communication methods:

USB
• Board appears as a virtual COM port
• Easiest, most reliable setup path
• Required for recovering misconfigured controllers

Ethernet
• The board connects to your router or network switch
• Base Station communicates over the network
• You'll need the board's IP address
• Static IP is ideal, but DHCP works fine for setup

WiFi
• Requires joining the board to your WiFi network first
• Can be trickier than USB or Ethernet
• Once connected, Base Station communicates wirelessly
• Taralist WiFi models can also use daily NTP time sync

Regardless of the interface you choose, you'll still:

• Open Base Station
• Select the correct COM port or network device
• Load the board's current configuration
• Begin building your schedule

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3. Creating Your Schedule (Up to 1000 Events)

Inside Base Station, you'll build your event list.
Each event can specify:

• Exact time (year, month, date, day of week, hour, minute, second)
• Which relay(s) to turn on or off
• Priority (events at the bottom of the list override events above)

You can create very simple schedules or extremely complex ones - but you must be comfortable managing lists, sorting events, and understanding scheduling logic.

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4. Setting the Clock

Before uploading your schedule, you'll set the Taralist's internal clock:

• Sync to your PC's system time (most common), or
• Manually enter the date and time

This clock runs on the board's internal battery so your schedule survives power loss.

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5. Midnight Backup Buffer (VERY Important)

Every night at midnight, the controller stores all relay states.
This prevents your logic from falling apart after a power outage.

You don't have to configure this feature, but you should understand that it exists - it's core to how Taralist keeps long-term schedules stable.

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6. Uploading Your Schedule

Once your schedule is ready:

• Switch the jumper to PROGRAM mode
• Upload your schedule to the board
• Switch back to RUN mode
• The board now runs autonomously

You can come back later and re-upload new schedules anytime.

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Optional: Manually Control Relays from Your PC

Base Station also lets you:

• Test relay states
• Override relays
• See which system (PC or Taralist logic) currently "owns" each relay
• Return control to Taralist logic afterward

This is extremely helpful during setup and troubleshooting.

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Who Is This For?

We recommend Taralist controllers for users who are:

• ✔ Comfortable on Windows
• ✔ Okay with basic COM port configuration
• ✔ Willing to follow a guided setup process
• ✔ Need recurring automation without software running 24/7

If you want a super friendly plug-and-play experience with no setup complexity, Taralist is probably not the best fit.

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Understanding Clock Drift

All real-time clocks drift a little over time - even high-quality ones. Taralist controllers are typically very stable, but the onboard clock can naturally drift up to about 1 second per day.

Temperature can also have a small influence:

• Cold environments: the clock may run slightly slower
• Warm environments: the clock may run slightly faster

The good news?
Taralist includes a Time Compensation feature that lets you counteract drift so your schedule stays accurate long-term.

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Bottom Line

Taralist controllers are incredibly reliable, deeply configurable, and ideal for long-term autonomous scheduling - but setup is hands-on, technical, and requires a PC.

If you're comfortable with that, you'll love what Taralist can do.
If not, no hard feelings - but this isn't the product you want.

Taralist Board Features

"Engineered for Reliability. Built to Scale."

Time Activated Relay Controllers (Taralist Series)

Taralist Time Activated Relay Controllers make scheduling easy. Each board includes an integrated real-time clock, so your relays can follow a precise schedule - day, hour, minute, second - without needing a computer connected 24/7.
Once you create your schedule in Base Station Software and upload it to the board, you're done. The controller handles the rest automatically.

These boards are ideal for lighting control, security systems, HVAC, bells, timed access, automation sequences, and any project that needs relays triggered on a repeating schedule.

But! Keep this in mind:

• The onboard clock can drift over time. Most users won't notice, but if your application requires precise long-term accuracy (bells, synchronized events, access timing, etc.), this may not be ideal.
• You can correct drift manually, but it takes periodic maintenance.
• If you need perfect time accuracy, consider using Relay Timer Software with a ProXR board, which uses your PC-s system time.

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Add Relays as Your System Grows

Every Taralist controller includes an onboard XR Expansion Port, allowing you to add relay expansion boards at any time.

Start with the number of relays you need today and expand incrementally - up to 256 total relays - without replacing your controller or rewriting your software.

Expansion boards share the same schedule structure and can mix relay types and amperages to match evolving system requirements.

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SPDT Relay Installed

SPDT (Single Pole Double Throw) relays include three terminals: Common (COM), Normally Open (NO), and Normally Closed (NC)

• When the relay is off, COM is connected to NC.
• When the relay is energized, COM switches to NO.

Your load can be wired to either the NO or NC terminal depending on whether you want the device to turn on when the relay activates or when it releases. Examples of wiring methods can be found in the gray Relay Logic tab.

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2 Million+ Cycles

ProXR relays are rated for long service life - expect years of dependable operation and millions of mechanical cycles.
Every controller includes a 5-Year Warranty and 30-Day Money-Back Guarantee.

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Essential Power Requirements

Clean, regulated power is critical.
A stable 12VDC supply ensures both the relay coils and onboard firmware operate correctly. Unstable or noisy power can cause improper switching or communication issues.

We recommend the PWR12-US (120VAC → 12VDC @ 1.25A) or our international supply with interchangeable adapters.
Learn More

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Break-A-Way Tabs for a Smaller Design

Need a smaller footprint? The Taralist PCB includes Break-A-Way Tabs, allowing the board to fit into optional undrilled enclosures or tight-space installations.

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RoHS Compliant & Lead-Free

All ProXR Lite controllers are built with RoHS-compliant components and lead-free solder.

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Shipping

All boards ship directly from our Missouri facility. Each unit is built and tested at the time of order - please allow 3 - 5 days for production. We ship primarily through UPS, but we're happy to use FedEx or DHL for international orders when you provide your account number. Questions? Call us at 800-960-4287 or email sales@relaypros.com.

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Induction Suppression

One of the most important parts of relay control - yet the most commonly overlooked - is inductive load protection.

Anything with a magnetic coil (motors, solenoids, transformers, etc.) generates high-voltage "kickback" when switched. Without a suppression capacitor, that spike can:

• Shorten relay lifespan
• Cause electrical noise that disrupts the microcontroller
• Trigger unexpected shutdowns
• Require power cycling to restore communication

Adding an induction suppression capacitor protects your relay contacts and keeps everything running smoothly. Capacitors are available at checkout, and our Induction Suppression Page has wiring diagrams and more details.

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Time Activated Relay Is Here!

Control relays with a time schedule and configure with Base Station software a free download.  Here's a lists of great features:

User Friendly Software
• Point & Click Interface - No Programming Knowledge Required
• Override Time Schedule When Computer is Connected to Board
• Read Status of Relays in Base Station

User Friendly Board Design
• Break-A-Way Tabs lets you decide the board's size
• Screw terminal or direct relay connections make connecting to the relays easy

Data Sheets & Quick Start Guides

Below are the Data Sheets Quick Start Guides for this board.  These are the guides that will help you communicate and configure this board.