Characteristics of ERD Series

(PUSH OR PULL)

serie-erd

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You can also contact us directly at:

Teléfono: +34 94 453 10 61

Email: elec@nafsa.es

Fax: +34 94 625 01 51


Standard voltage:
Vdc (24V, 48V, 110V, 125V)
Vac (110V60Hz; 230V50Hz)

Electromagnets protection rate: IP00

Cycle duration: 3 min

Insulation class: B (130ºC)

Work: Pull/push

Return spring incorporated: Yes

Plunger weight: 117 gr.

Electromagnet weight: 720 gr.

Documents:

TYPE: ERD60-05/C

Description

Simple effect linear solenoids of the ERD serie have got a double coil, one of them with low resistive value (pulse coil) and the other one with high resistive value (holding coil).
It is used when a 100% duty cycle and a huge force at the begining of the stroke are needed.

Working

Before the performance, when the solenoid is off (see fig.3), the holding coil must be off by an external microswitch.

The solenoid is fed at its standard voltage Un (between 1 and 2 terminals) and only the pulse coil works (as it has got low resistive value, it will demand much power), and the solenoid shaft moves due to the forces indicated in chart 2.

When total stroke is completed the solenoid shaft must push the microswitch and quit short-circuit of the holding coil, so both serie coils start to work, adding its resistive value and getting little demand of power.

Drawing double coil ERD

Application examples

Pulse coil

Chart 1
Duty cycle (ED%)
20
15
10
5
3
Absorved power at 20°C
68
115
169
337
462
Excitation max time (s)
36
27
15
8
5
Chart 2
Duty cycle ED(%)
Stroke “s” (mm)
20
15
10
5
3
Magnetic Force Fm (N)
25
6
9
13
24
33
20
8
13
18
33
46
15
11
19
25
44
61
10
18
28
36
64
88
5
36
56
74
137
140
3
63
94
114
162
188
1
196
235
259
263
288
0
378
390
411
436
440

……………………………….

 Chart 3
Standard return spring
ERD60/5
ER60/5
ER60/5/B
Force (N) a 25mm
9.7
1.6
5
Force (N) a 0 mm
44
5.3
21
Constant (K)
1.37
0.15
0.65

Holding coil

  • Power: 4 W
  • Duty cycle (ED%): 100%
  • Holding force: 60N

Drawing (Solenoid off)

Solenoid ERD off

All the solenoids are tested at 20ºC. The force will decrease due to the standard temperature rising, decreasing a 30% at 65ºC. When the temperature is -10ºC, standard current will increase a 15%.

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