Dynatech DA-UD Gebrauchs- Und Wartungsanleitung Seite 5

[1] Releasing the spring only allows the roller to be put into contact with the guide rail. For the effective performance of the
safety gears, the car must be into motion.
Figure CA021.01. PRT.83.2.1500/1 (front and back view assemblies)
1 Activation spring
2 Movable assembly
3 Driving cams
4 Rollers cams
5 Force divisor
1.4.2. Subtype PRT.83.2.1500/2
Components: please refer to picture CA021.02.
Operation:
Holding. The electromagnetic suction cup VEM-30 (15) keeps the activation spring (1) retained. This suction cup
must be fed continuously. The PWM circuit is not use in this subtype.
Activation. The input from the governor opens the suction cup coil supply so the energy from the compressed
spring is released. The spring pushes the cams until the safety gear roller is brought into contact with the guide
rail .
[1]
Reset. ECH65-15 or o ECH65-15.01.230.50.40.D4D (6) electromagnet is used in this subtype only for reset
purposes. The coil and suction cup must be power supplied. Once the reset is done, the coil of ECH65 must
remain switched off.
[1] Releasing the spring only allows the roller to be put into contact with the guide rail. For the effective performance of the
safety gears, the car must be into motion.
This arrangement is made in two alternative ways, one where the reset coil shaft and the sliding carriage that
cause the movement of the activation cam assembly are joined together, and another in which they are
decoupled. For this second alternative the coil shaft carries the suction cup plate to the resting position where the
carriage is retained by the suction cup coil. Then the reset coil is switched off and its shaft is released. For this
alternative the reset coil shaft position is monitored by a microswitch, sending an independent input to the lift
controller.
Technical annex to certificate ATI /CA021 rev.4
6
Electromagnet ECH65-15 / ECH65-15.01.230.50.40.D4D
7 Balance spring
8 Monitoring contact
9 Safety contact
10 Suction cup VEM-30
11 Suction cup plate
12 Suction cup monitoring contact
Figure CA021.02. PRT.83.2.1500/2 (back view assembly)
Note: rest of components as in PRT.83.2.1500/1
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