3-Phase 7-Day Programmable Timer Switch 380V | 28 Programs

CN109S-380V Three-Phase 7-Day Programmable Digital Timer Switch

Take full control of your three-phase industrial and commercial equipment with the CN109S-380V Programmable Timer Switch. Featuring a large backlit LCD display and precision-to-the-second scheduling, this robust digital time controller lets you automate pumps, aerators, exhaust fans, water heaters, signage, and more — completely hands-free, 24/7.

Why Choose This Timer Switch?

• 28 ON/OFF Programs: Schedule up to 28 independent on/off events across a 7-day (Monday–Sunday) weekly cycle — perfect for complex automation routines.
• 1-Second Interval Precision: Accurate-to-the-second timing gives you pinpoint control over your equipment's operating schedule.
• Three-Phase Design (No Neutral Line Required): Three live-wire input and output configuration eliminates the need for a neutral/zero line — a practical advantage for installations where a neutral line is unavailable.
• Wide Voltage Range: Accepts input from 350–440VAC (50/60Hz) and delivers a 16A / 380VAC output, compatible with three-phase motors and industrial equipment rated 350V–420VAC.
• Battery Backup: Built-in battery backup preserves your programmed settings during power outages so you never lose your schedule.
• Manual Override: Instantly override any scheduled program with a manual on/off control — ideal for maintenance or unexpected changes.
• High-Contrast Backlit LCD: Large, bright display ensures easy reading and programming in any lighting condition.
• LED Power Indicator: Clearly shows operational status at a glance.
• Reset Function: Quickly restore default settings when needed.
• Permanent Loop Mode: Set once and let it run indefinitely — true unmanned, set-and-forget automation.

Specifications

Common Applications

• Water pumps & pond aerators
• Industrial steaming machines
• Commercial water heaters
• Billboards & neon signs
• Exhaust fans & ventilation systems
• Three-phase motors & industrial equipment (350V–420VAC)

Package Contents

• 1× CN109S-380V Three-Phase Programmable Timer Switch

Note: Colors may vary slightly from images due to screen settings. Please allow ±1cm dimensional tolerance due to manual measurement. Battery not included.

For general electrical safety guidelines and best practices, refer to the OSHA Electrical Safety resource.

Frequently Asked Questions

Q: Does the CN109S-380V timer switch require a neutral (zero) line to operate?

A: No — the CN109S-380V three-phase timer switch uses three live-wire inputs and outputs only, with no neutral line required. This makes it ideal for three-phase installations where a neutral line is not available or is inconvenient to wire.

Q: How many schedules can I program on this 7-day timer switch?

A: You can program up to 28 ON/OFF events across a full 7-day (Monday–Sunday) weekly cycle. Schedules can be set for individual days or recurring weekly patterns, with a minimum interval of 1 second and a maximum of 168 hours (one full week).

Q: Will my programmed schedule be lost during a power outage?

A: No. The CN109S-380V includes a built-in battery backup that retains all programmed settings even during a power failure, so your automation schedule picks up right where it left off once power is restored. Note that the backup battery is not included in the package.

Q: What types of equipment is this three-phase timer switch compatible with?

A: This timer switch is compatible with three-phase equipment operating at 350V–420VAC, including water pumps, pond aerators, steaming machines, water heaters, exhaust fans, billboards, neon signage, and industrial motors. Its 16A output rating makes it suitable for a wide range of commercial and industrial applications.