Two speeds limit switches
Especially suitable for safety operation of
great size mobile machines (for instance crane trolleys), 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.
Two speeds limit switches are equipped with 4
microswitches 1NO+1NC (2 per direction of travel), homologated by CE, UTE, VDE,
ASE, CSA, UL, IMQ, that are triggered as shown:
|
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. |
|
|
|
|
|
|
On request
the two speeds limit switch can be fitted with bars longer than that
represented in the picture above.
To learn more about our products contact us
(our technical department is at Your disposal) or see our on line catalogue
(including technical specifications and dimension) at www.stzsrl.it
S.T.Z. s.r.l. 23877 Paderno d’Adda (LC) Italy
Strada delle Brigole n° 2/A
Tel: ++39039514038 (English spoken) – Fax:
++39039514044
E-Mail: stz@stzsrl.it - Internet page: www.stzsrl.it