Model 4480

Regular price $436.00

Model 4480 Two-Hand Machine Control Anti-Tiedown Monitor

Nolatron’s Model 4480 Switch Monitor provides two-hand control for presses, welders, molders, and various production machines. The 4480 also helps to comply with OSHA, which requires an operator to have both hands on start switches in order to begin a machine cycle. This minimizes the possibility of an operator having a hand in the work area when a machine cycle is started. If one or both switches are “tied-down”, the control will not allow a new machine cycle to begin.


Compatible with single pole hand sensing devices

Uses redundant positive guided relays

Meets the OSHA classification of “Control Reliability’

Uses a detachable terminal strip for easy installation and removal

The 4480 series can replace Nolatron’s 4470 series with no modification to wiring.


As each start switch is closed, it will be delayed for .075 seconds* before an internal relay is energized. If both start switches are closed within a time of .5 seconds**, the output contact will close and the load will energize. The output contact will remain closed until one or both start switches are opened. Both switches must be released before another cycle is initiated.

MAINTAINED OUTPUT – An optional Hold switch can be wired into the circuit fo the 4480 (see wiring diagram) to provide a maintained output. When the two start switches are activated and the Hold switch is closed, the load will remain energized even after the start switches are released. The Hold switch must not close until after the pinch-point is passed, and should remain closed for the rest of the machine cycle. Opening the Hold switch will de-energize the output.

If the optional Reset switch is opened at any point during the machine cycle, the output will de-energize and the control will reset. Both start switches must be opened and the Reset switch must be closed before another machine cycle can be initiated.


Physical Dimensions

120 mm x 100 mm x 50 mm (4.7″ x 3.7″ x 2.0″)


0.6 kg (1.25 lbs.)

Power Requirements

115 VAC, 50/60 Hz @ 0.1 A 230 VAC, 50/60 Hz @ 0.05A

Power Line Monitor

Resets if supply drops below 90V RMS (115V application), 180V RMS (230V application) for more than 15ms.

Output Load Rating

8 Amps (Switching) 6 Amps (Continuous)

Output Life

10 million mechanical operations (minimum)

Hand Switch Delay

0.05 to 0.15 seconds (factory set at 0.075 seconds)

Switches must be activated within:

0 to 0.7 seconds (factory set at 0.5 seconds)

Delay on Power-up

5 seconds (approximate)

Temperature Range

Up to 60°C (140°F)


Made in U.S.A.


Nolatron 4480 Brochure 

Nolatron 4480 Application Notes