NEMA 4X - 4/12 Pit Float Switch - 51101-PF
NEMA 4X - 4/12 Pit Float Switch - 51101-PF
After a tragic death where a person drowned in an elevator during tropical storm Allison in Houston, TX, pit float switches have been specified on more elevators nationwide.
The Elevator Pit Float Switch is designed to close a contact when the water float is activated, 3/4” throw required to activate sensor.
Lead Time If Not In Stock: 5-7 Days - Depending on Quantity
Please note that this device is simply a water sensor contact and does NOT contain the logic, circuitry, relays to actually run the elevator. You may need to add relays or additional circuitry to your controller in order for pit flood service to work correctly.
Steps that should happen if water is sensed in the pit and this device is activated should include the following based on our recommendation.
Recommended Operation
With pit flood device mounted 1”-2” from pit floor the following sequence of operations should occur.
CJA Controllers from 2010 and above have Pit Flood Circuitry Built In.
1. Pit Flood Sensor Rises and Closes Contact.
2. Closing Contact Connects Back To Controller
3. Elevator Runs To Top Floor, Doors Open and Stay Open
4. All Hall Calls and Car Floor Buttons are Disabled
5. Fault Code On Controller Pit Flood Cannot be Cleared Until Elevator Is Checked By Mechanic/Inspector.
IMPORTANT NOTE: The sequence of operation mentioned above is something that 2010 and newer CJA Elevator Control Systems have built into the programming. If your controller is older and/or manufactured by another company, it may not be able to perform the tasks indicated above. We recommend that at the very least you are able to add relays so that the elevator runs to the top floor if the float switch is activated and stays at the top floor, disabling all car and hall calls until the elevator can be inspected by a trained elevator mechanic.
Specifications
Number of Circuits Controlled: 1
Switch Starting Position : 1 On (Normally Closed)
Industry Designation: SPST-1NC
Contact Type: Encapsulated Hall Effect Magnetic Sensor
Maximum Voltage: 240 VAC, 120 VDC, 120 VAC, 24 VDC
Input Voltage: 120VAC/125VDC
Make & Break Amps: 0.40A @ 240 VAC • 0.20A @ 120 VDC - 0.50A @ 120 VAC • 0.50A @ 24 VDC
Wire Connection Type: Wire Leads
Wire Terminal Number: 2
Dimensions: 7.5” High x 4.25” Deep x 4” Wide
Housing Material: Powder Coated Zinc Diecast
Cover Plate Material: Powder Coated Zinc Diecast
Sensor Material: Stainless Steel 304
Fasteners Included: No
Conduit Holes in Enclosure: Yes - Qty. 3 - 1/2” Threaded
Environment: Wet Locations, Dust, Damp, Corrosive
Built To Comply Protect: To - NEMA 4/12/4X
Specifications Met: UL/CSA/CE Listed Components
Required Products: None
DOWNLOADS
51101-PF Dimensional Drawing.pdf