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LIMIT SWITCH CROSS WISE – BAR – LEVER AND WHEEL

 

TECHNICAL SPECIFICATIONS

 

Conforming to standards: CEI EN 60947-1, CEI EN 60947-5-1, CEI EN 60529, CEI EN 60204-1

Certifications: CE

All metal shell: zamak

Ambient temperature: Storing  –40°C +70°C

Ambient temperature: Working –20°C +70°C

Protection level: IP 65 according to CEI EN 60529

Insulation class: Class I according to IEC 536

Cable input: n° 3 threaded holes PG 13,5

Connection speed: up to 3 m/s

Maximum over shot

 

TECHNICAL SPECIFICATIONS OF THE CONTACT ELEMENTS

Certifications: CE, CSA, UL, IMQ, UTE, VDE, ASE.

Nominal thermic current: 10A according to CEI EN 60947-5-1

Nominal insulating voltage: 300V~ (CEI EN 60947-5-1)

Mechanical duration: 10.000.000 maneuver (107 cycles)

Maneuver frequency: 50¸60 man. each minute (up to 1 Hz)

Identification of terminals: According to CENELEC EN 50013

Protection against short circuits: cartridge fuse 10A according to CEI EN 60947-5-1

Connecting capacity (max. wire section): 1x2,5mm2 or 2x1,5mm2

Fast kick silver contacts

Maximum working voltage 500V~

Nominal magnitude of current: 16A at 250V~

Fast kick silver contacts

FASTON or screw type (standard) connections

 

LIMIT SWITCH OPERATION ANGLES

 

 

“Bar” limit switch

“Lever and wheel” limit switch

0

Reset position

 

A

Microswitch working angle

22°

1

Maximum left handed operation

65°

2

Maximum right handed operation

65°

 

 

 

“Bar T” limit switch

“Cross wise” limit switch

0

Reset position

 

A

Microswitch working angle

65°

1

Maximum left handed operation

90°

2

Maximum right handed operation

90°

 

The end of round of the “T bar” and of the “cross bar” limit switches have no limit stop (i.e. they can rotate around 360°).

All limit switches can be equipped with 2 or 4 microswitches (1NO+1NC).

 

N° of microswitches triggered on the right

 

 

Cat. n°

N° of microswitches triggered on the left

 

 

N° of microswitches fitted on the limit switch

 

 

2

1

1

251

-

2

252

2

-

253

4

2

2

254

-

4

255

4

-

256

2

1

1

261

-

2

262

2

-

263

4

2

2

264

-

4

265

4

-

266

2

1

1

271

-

2

272

2

-

273

4

2

2

274

-

4

275

4

-

276

2

1

1

281

-

2

282

2

-

283

4

2

2

284

-

4

285

4

-

286

MEASURES IN mm

 

TWO SPEEDS LIMIT SWITCH

This limit switch triggers a slowing of the machines before the stop. This smooth braking sensibly reduce the risk of crashing due to sudden halts. They are fitted with 4 microswitches 1NO+1NC.

It functions both clockwise and counter clockwise.

Cat. n°

274/V

284/V

 

Position

Action

A

The crane trolley moves at full speed. No microswitch triggered.

B

Pre-slowing: near the end of the guide, the limit switch rotates by 90°. The first microswitch is triggered and so the crane trolley speed is halved.

C

Stop. The limit switch rotates by 180° and the second microswitch is triggered. The crane trolley is stopped before crashing.

 

 

 

CONTACT OPERATION

MICROSWITCH POSITION

LEFT (BACKWARDS)

RIGHT (FORWARD)

180°

90°

0°

90°

180°

1

1

1

1

1

2

2

2

2

2

3

3

3

3

3

4

4

4

4

4

4

3

N° MICRO

1

2

 

 

E-Mail: stz@stzsrl.it

S.T.Z. s.r.l.

Strada delle Brigole n° 2/A

23877 Paderno d’Adda (LC) Italy

Tel: 0039 039 514038

Fax: 0039 039 514044