Nolatron's 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.
The 4481 can be wired to operate in the following ways:
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 either of the switches is released.
Maintained Timed Output - Both start switches must be pressed within .5 seconds to energize the load. Closing the Hold switch will allow the load to remain energized afted 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 a start switch is released. The time cycle will not begin until the Delay switch opens.
Maintained and Delayed Timed Output - Both start switches must be pressed within .5 seconds to energize the load. Closing the Hold switch will allow the load to remain energized after the start switches are released. The time cycle will not begin to time out until the Delay switch opens.
Specifications:
| Physical Dimensions | 4.7" x 4.3" x 2.75" (l x w x d) |
| Weight | 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 | .05 to .15 seconds (factory set at .075 seconds) |
| Switches must be activated within: | 0 to .7 seconds (factory set at .5 seconds) |
| Delay on Power-up | 5 seconds (approximate) |
| Temperature Range | 0 - 140 degrees F |
| Origin | Made in U.S.A. |