LIMIT SWITCHES
Furnas Brand Series 54 Rotary Limit Switches
Limit the travel of electrically operated doors, conveyors, hoists, machine tool work tables and similar devices. Equipment having rotating mecha-
nisms, or linear motion which can be translated into rotational motion, can be controlled by these versatile switches. Furnas Series 54 switches can
be mounted in any position and are easy to wire and adjust.
Switches Feature
• Four Gear Ratios
• Standard, Long Dwell or Fine Adjustment Cams
• Right or Left Hand Shaft
• Easy to Wire and Adjust
• Mount in Any Position
• Rugged Die-cast Aluminum Housing
• Available for NEMA 1, NEMA 4, and NEMA 12 Applications
• Multi-use Shaft…Attach Drive Sprocket using
Woodruff Key, Pin or Setscrew
Application
Furnas Series 54 switches are designed to serve as pilot controls for magnetic reversing starters and contactors which in turn make and break full voltage
between line and load. Contacts in the switch are operated when the external shaft is rotated. For the switch to perform a pilot control function, the contact
must be wired in series with the coil circuit of a magnetic reversing starter or contactor.
The shaft may rotate in either direction. When tripped, if rotation direction is reversed, the contacts will reset in 1/4 to 1 1/2 turns, depending on shaft-to-cam
ratio. Switches with Long Dwell Cams are available. These cams provides for the contacts to be actuated for a longer period of time as might be required in
hoist or similar applications.
Fine adjustment cams are also available. This feature increases accuracy in setting the number of turns to cause the contact to operate.
MODELS–Series 54 Model numbers are for RIGHT HAND SHAFT. For left hand shaft add L to model number.
Turns of Drive Shaft to Trip Contacts
Circuits
NEMA 1 & 12
Industrial Use Watertightse
Model No.
NEMA 4
Gear
Ratio
Contact
Blocks
Min.
Min.
Overtravel
Reset
NO
NC
Model No.
Standard Cams
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
54BB23FE
54BB33FE
54BB43FE
54BB23FB
54BB33FB
54BB43FB
54BB23FC
54BB33FC
54BB43FC
54BB23FD
54BB33FD
54BB43FD
54BB23EE
54BB33EE
54BB43EE
54BB23EB
54BB33EB
54BB43EB
54BB23EC
54BB33EC
54BB43EC
54BB23ED
54BB33ED
54BB43ED
18 to 1
16
32
64
96
1
1
1.75
3.5
7.5
11
0.25
0.5
1
36 to 1
72 to 1
1.5
2
108 to 1
Long Dwell Cams
18 to 1
1.5
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
2
3
4
54EB23FE
54EB33FE
54EB43FE
54EB23FB
54EB33FB
54EB43FB
54EB23FC
54EB33FC
54EB43FC
54EB23FD
54EB33FD
54EB43FD
54EB23EE
54EB33EE
54EB43EE
54EB23EB
54EB33EB
54EB43EB
54EB23EC
54EB33EC
54EB43EC
54EB23ED
54EB33ED
54EB43ED
15
30
60
90
1
1.5
2
2.5
5
0.5
1
36 to 1
72 to 1
108 to 1
10
15
1.5
3
2
Fine Adjustment
18 to 1
16
32
64
96
1
1
1.5
2
1.75
3.5
7.5
11
0.25
0.5
1
2
2
2
2
2
2
2
2
2
2
2
2
54BB73FE
54BB73FB
54BB73FC
54BB73FD
54BB73EE
54BB73EB
54BB73EC
54BB73ED
36 to 1
72 to 1
108 to 1
1.5
Dimensions–inches (mm)
(4) Mounting Holes
for No. 10 Screw
Field Modifications
1.00(25)
Tapped for
1" Conduit
Contact Block Kit (1 NO 1 NC)
Cat. No.
Standard Cam
Long Dwell Cam
54BBGB
54EBGB
4.25
(108)
Contact Block Specifications
15 Amp 120, 240, 480 or 600 VAC.
1/2 H.P. 120 VAC, 1.0 H.P. 240 VAC
0.8 Amp 115 VDC, 0.4 Amp 230 VDC
Pilot Duty 600 VAC Max.
0.50
3.50
(89)
3.31
(84)
Contact Block Kit (1 NO 1 NC)
Cat. No.
(13)
2.13
(54)
Standard Cam
Long Dwell Cam
54BBGD
54EBGD
0.625(16)
Accessories
Cat. No.
0.56
(14)
1.81
(46)
Approximate Shipping
Weight 6 lbs (2.7 kg)
Adjustment Tool
D27760001
4.875 (124)
5.31 (135)
1.81
(46)
Kits include switch block, cam and mounting hardware
Gleason Reel Corp. • 600 South Clark St. • P.O. Box 26 • Mayville, WI 53050 • Phone: 920-387-4120
25
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