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National Control Devices, LLC


RS-232 Time Activated Relay with Serial Interface

Time Activated Relay Channel with RS-232 Interface

RS-232 Time Activated Relay with Serial Interface

Time Activated Solid State Relay

All The Features You Need...

  • Relays Installed on Circuit Board
  • Control Relays based on Time Schedule
  • Reliable Sturdy Design
  • RS232 Interface with choice of connector
      - Onboard DB9 Connector:
      - Screw Terminal Connector
      - Off the Board DB9 Connector
  • Connects to Any Available COM Port
  • Supports Daylight Savings Time
  • Sync Time with PC or Manually Set Time
  • Base Station Software
     - Point & Click Interface
     - Use to Configure Time Schedule
     - Manually Trigger Relays

RS-232 Time Activated Relays
Set Time Schedule to Trigger Relays

Our Time Relays are equipped with firmware built into the board that will allow you to setup a time schedule to trigger relays.  The Time Relay series has an integrated Real Time Clock to control relays based on a time schedule (the board knows what day & time it is).  Connect these controllers to the serial port of your computer to setup the time schedule & upload it to the board. Once stored, the computer is no longer needs, and the relays will activate according to your schedule that can be as simple or as complex as your application requires.

Time Schedule Control

Events are scheduled times when a relay or group of relays are turned on or off.  They are defined by the user first by time: Year, Month, Day of Month, Day of week, Hour, Minute, and Second.  You have the ability of switching relays on or off at very specific times.  You can add up to 1000 Events to the list.

Time Relay - Without Having to Learn Programming
These -Channel Time Activated Relays con trigger
relays according to a time schedule!
Time Activated Relay You Can Count On!


Also Available:

Timer Software

Relay Timer
Relay Timer R2X Programmable Timer
For applications where time must match a computer or server use Relay Timer.

Relay Timer is software that uses a computer's time!
Relay Timer Software  

Selecting The RS-232 Interface

RS232 Relay ZRSB ModuleBy selecting the RS232 interface you will be uploading the time schedule to the board through either a DB9 or direct wire interface.  Boards on this page are equipped with a ZRS communications module that adds RS-232 communications to the board.  At checkout you will have three modules to choose from with either a DB9 or direct (3-wire) connection.  A command consists of a few bytes of data in numerical format usually between 2 and 6 bytes.  Once the command has been received, the controller processes the command and the relay activates.

Selecting an RS232 Relay Board

Below you will find the -channel RS232 Relay control that are available.  The difference being the amperage of the relays installed and the type of relay.  Choose the controller that fits the amperage you are switching.  You will find SPDT relays in the 5, 10 and 20 amp versions and an SPST version in 30 amp.  For more information on selecting the correct relay for your application see Choosing a Proper Amperage.