Limit Switches

Models & Ratings

Heavy Duty Limit Switches

Type of Actuation Roller Level Cylindrical Roller Lever Pull Lever Pull Lever
(Crane Drum)
Over-Winding
Protection
Fork Lever
Horizontal Mounting

Vertical Mounting

Type1 PSKU-#R25A_ PSKU-#R25AB PSKU-#R25AV PSKU-#R25AE PSKU-#R25AO PIKU-#R25A_
Switch Action Spring Return Maintained
Contact
Arrangement
Available2
1NO (2-way operations)
1NC3 (1-way operation
2NO (2 way operations)
1NO1NC3 (1-way operation
2NC3 (1-way operation)
1NO, 1NC, 2NO, 1NO1NC, 2NC (1-way operation)
1NO
2NO
1NO1NC4

 

Type of Actuation Pull Lever (One Direction Pull) Pull Lever
(Crane Drum)
Over-Winding
Protection
Fork Lever Pull Lever (One Direction Pull)
Type1 PIKU-#R25AE PSKU-#R25AO PIKU-#R25A_ PIKU-#R25AE
Switch Action Maintained Spring Return Maintained
Contact
Arrangement
Available2
1NO, 1NC, 2NO, 1NO1NC, 2NC, (1-way operation) 1NO, 1NC, 2NO, 1NO1NC, 2NC (1-way operation)
1NO
2NO
1NO1NC4
1NO, 1NC, 2NO, 1NO1NC, 2NC, (1-way operation)
  • Types with # such as PSKU-#R25A can vary depending upon the contact arrangement 1NO [100], 1NC [010], 2NO [200], 2NC [020], 1NO1NC [110]
  • Change of NO contact to NC contact connot be done at user.
  • The lever movement is limited to either clockwise or counterclockwise operation. When ordering, specify the lever moving direction. For the 1-way operation of 1NO1NC, or 2NC, specify "R" at the end of the part number if CW is required or "L" for CCW.
  • Where contact arrangement is 1NO and 2NO, specify the operating direction required. If it should turn on in CW operation, specify "R" at the end of the part number. Specify "L" for CCW.
  • Type PSKU-#R25AO for crane drum over-winding protection will not restrict. However, after the contact has turned off, effective measures should be taken to lessen the effect of accidental turn on due to shock or vibration.
  • Heat-resistant, corrosion-resistant type PSDH is available on order.

Floodtight Type Limit Switches

Type
PSPE-05E1
PSPE-05E2
Contact Arrangement
1NO
1NC
Incorporated Bestact Type
R15U
Operation Characteristics Pretravel
3.5mm or less
Overtravel
6.0mm or greater
Total Travel
9.0mm or greater
Release Position
1.5mm or greater
Operating Force
2.1kgf or less
Operating Frequency
3600 times/hour
Rated Insulation Voltage
250VAC
Rated Continuous Current
5A
Operational Power Ratings
240VAC 1.0A, 115VDC 0.5A
Maximum Making Current
240VAC 30A (PF: 0.7)
Insulation Resistance
100MW or greater (with 500V megger)
Withstand Voltage Across Contacts
800VAC for 1 minute
To Ground
1500VAC for 1 minute
Service Life Mechanical
5,000,000 operations
Electrical1
240VAC 5A making 0.5A breaking (PF: 0.4) over 1,000,000 operations
115VAC, relay coil load (36mA) over 5,000,000 operations
230VAC, relay coil load (146mA) over 5,000,000 operations
115VDC, relay coil load (50mA) over 5,000,000 operations
Shock Resistance
294m/s2 (30G) or greater
Vibration Resistance
49m/s2 (5G) or greater (15 to 200 Hz)
Ambient Temperature Operating
-10 to +60°C (excluding icing)
Storage
-25 to +70°C
Enclosure
Floodtight/Oiltight IP57
  • For application to DC circuit, connect the black lead to (+) and the white lead to (-).