Characteristics of VM/ND series

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Teléfono: +34 94 453 10 61

Email: elec@nafsa.es

Fax: +34 94 625 01 51


Protection rate: IP65

Insulation class: Y (90ºC)

Standard voltage: 24 Vdc

Standard duty cycle: see chart

Supply possibilities: Flying leads for every size:

  • VM20/ND, VM30/ND, VM40/ND: 1×0.25 mm²
  • VM50/ND, VM65/ND, VM100/ND: 1×0.5 mm²
  • VM150/ND: 2×0.75 mm²

Other voltage, ED and sizes: Inquiry

Documents:

Description

The attraction and holding of the magnetic pieces are made by permanent magnets mounted in the solenoid. With these kind of products, we avoid the risk of load falling due to sudden power supply failure. The power supply on the coil allows to loose the load, when this power supply stops, the product recovers its initial force. When working with hanged loads norms must be respected.

Size P at 20°C (W) ED (%) Minimum pulse time (ms) Minimum resting time (ms) Thickness of the piece to be hold (mm) Airgap (mm) Dimensions (mm) Weight (kg)
0 0.2 0.5
 Magnetic force Fm (N) øA(-0.3) B C±0.1 D E
VM20/ND 10 20 24  180
1
3
10
22
39
39
7
7
7
1.7
1.7
1.7
20 M-3 25 5 26 0.04
VM30/ND 25 20 110  825
1
3
10
46
181
181
34
74
74
22
22
22
30 M-4 32.5 6 35.2 0.13
VM40/ND 42 15 75  743
1
3
10
51
205
270
36
89
89
23
38
38
40 M-5 41.7 6 42.7 0.28
VM50/ND 48 15 120  1188
1
3
10
60
304
607
41
200
225
34
95
110
50 M-5 42.8 6 52.5 0.45
VM65/ND 80 15 225  2228
1
3
10
70
374
1220
50
340
750
40
260
400
65 M-8 45.5 8 67 0.74
VM100/ND
75 25 150  1500
1
3
10
83
421
2205
61
365
1254
49
338
686
100 M-10 67 10 102 3.00
VM150/ND 77 40 285    1070
1
3
10
78
615
2254
46
475
1490
32
401
1100
150 M-16 65 15 152 7.10

Terminales libres

Flying leads VM/ND Serie

IMPORTANT: THE CLAMPING SCREW DOES NOT TO EXCEED MEASURE D

The table gives for each type of holding magnet, the values of the minimum pulse time and resting time measured in the following conditions:

  • With a weight of 5% of the maximum magnetic force made by each model.
  • Coil working on its regime temperature.

The data shown in the chart are the Magnetic Force (Fm) values depending on the air gap, measured in the following conditions:

  • No power supply.
  • Flat piece (3 µm rugosity) in AºSt37 and thickness as shown.
  • Room temperature 35ºC.

The dimensions of the pieces used in the test are similar or bigger than the attraction face of the different holding electromagnets. At different conditions the magnetic force (Fm) may decrease. The value of the magnetic remanence after the power supply stops is 5% of the holding force.

Under demand an internal protection can be added to the coil to protect it of the overheating, generated by the no respecting of the times given by the duty cycles, this overheating can demagnetize the internal magnet or destroy the coil cahnging the proper working of holding magnet.

When lifting or handling heavy loads a minimun security margin of 3 must be respected, the weight of the load cannot exceed 33% of the magnetic force.

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