4481

Model 4481 Two-Hand Switch Monitor with an adjustable timed output

 

Model 4481 Anti-Tiedown Switch Monitor

 

The Nolatron Model 4481 anti-tiedown switch monitor provides two-hand start control for machine applications which use single-pole hand sensing devices. The 4481 is unique in that the length of time of its pulse output can be adjusted by a potentiometer knob which is located on the outside of the control.

Features:

Anti-tiedown – The 4481 requires an operator to have both hands on start switches in order to start machine operation. This minimizes the possibility of the operator starting the machine while his hand is in the work area.

Control Reliability – The 4481 is designed to meet the OSHA classification of “control reliability” as defined in section 1910.217(13).

Redundant Output Contacts – The 4481 uses double “positive guided” output relays. Each relay is checked for proper status prior to beginning a machine cycle.

Hand Switch Inputs – The 4481 is designed to interface with dry contact single pole hand switches and electronic hand sensing devices.

Low Voltage Detector – If the supply line voltage to the 4481 drops below 90 VAC (115v operation), the 4481 will not allow the load to be energized.

Easy Wiring – The 4481 is wired using a detachable terminal strip for easy installation and removal.

Operation:

TIMED OUTPUT – Both start switches must be pressed within .5 seconds to energize the load.  The load will remain energized until the time cycle is completed or one or both start switches are released.

MAINTAINED TIMED OUTPUT – Both start switches must be pressed within .5 seconds to energize the load. When the Hold switch is closed, the load will remain energized for the remainder of the time cycle, even if the start switches are released.

DELAYED TIMED OUTPUT – Both start switches must be pressed within .5 seconds to energize the load. The load will remain energized until the time cycle is completed or one or both start switches are released. The time cycle will not begin until the Delay switch is opened.

MAINTAINED and DELAYED TIMED OUTPUT – Both start switches must be pressed within .5 seconds to energize the load. When the Hold switch is closed, the load will remain energized for the remainder of the time cycle, even if the start switches are released. The time cycle will not begin until the Delay switch opens.

Specifications:

Physical Dimensions 120mm x 100mm x 50mm (4.7″ x 3.7″ x 2.0″)
Weight 0.6 kg (1.25 lbs.)
Power Requirements 115 VAC, 50/60 Hz @ .1 A 230 VAC, 50/60 Hz @ .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)
Origin Made in U.S.A.

Nolatron 4481 Brochure

Nolatron 4481 Application Notes with Wiring Diagram



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