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TDR-A: Alternating Relay, Local or Remote

• Sequence Switch


• 24 to 240VAC/VDC  

  (Universal Voltage)


• Float or Contact Input


• Local or Remote Selector



• Plug-In Package


• Status LEDs


Alternator Function 

The TDR-A provides an alternating function, based on the opening of the remote contact “C” (Float Switch). With supply power applied when the remote contact C closes, the output relay stays in its existing condition. When contact C opens, the output relay changes state. Each subsequent opening of the contact C changes the state of the output contacts and provides the alternating function.


Selecting “Adjustable” option provides a Local-Remote pump selection switch on the TDR-A.

• Local - “Pump 1-Auto-Pump 2” switch is on the TDR-A

• Remote - A remote selector switch can be wired into the socket


Relay LED: Red - De-energized Green - Energized

Input LED: Red - No Input Signal Green - Closed Input




Supply Voltage: 24VAC/VDC to 240VAC/VDC

Frequency: 50 to 400Hz

Pick-Up/Drop-Out Delay: 0.5 Sec

Pump Select: Pump #1-Auto-Pump #2

Switch Select: Local-Remote

Power Consumption: 1.5VA

Indicators: 2 LEDs

     Output Relay: Green-On; Red-Off

     Float Input: Green-Closed; Red-Open

Output Rating @ 25°C:

     5 Amps @ 250VAC (General Purpose) 1/8 HP @ 120VAC

     5 Amps @ 30VDC B300 (Pilot Duty) 360 VA

     3 Amps @ 120VAC

     1.5 Amps @ 240VAC



Mounting: Plug -In

Termination: 8 or 11Pin

Packaging: Dust Cover

Weight: 8.5 Oz. Approx.


Ambient Temperatures

Operating: 0°C to 65°C

Storage: -40°C to 85°C


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