Jetter JetMove 225-480, Руководство пользователя, Страница: 104 / 126

13 Safe Standstill (Option)
JetWeb
104 Jetter AG
13.5.5 Application 4
Fig. 28: Application 4
The safety device activates relay K1, which activates the digital servo amplifier via
NOC 13-14 and the controller input "INPUT" via another NOC 23-24. This input has
to be configured either by the controller program or via the motion setup in a way that
at 0 V, the emergency stop function of the servo amplifier is activated.
Simultaneously with relay K1, a dropout-delayed safety relay K2 is activated. Its NOC
is series-connected to a contact monitoring the motor speed. The contact of the
speed monitoring is closed, while the motor is running; it opens at zero speed. When
the Safety function is called up, relays K1 and K2 are deactivated. By opening, the
NOC 23-24 of K1 triggers a controlled braking process. The servo amplifier still
remains active, until relay K2 also drops out due to the drop-out delay, or until the
motor has come to a standstill due to the braking process that has been triggered.
Deactivating the Enable1- and Enable2- inputs leads to switching off the motor
immediately after a pre-defined delay time, respectively, after the motor has come to
a standstill (Stop Category 1). In case switching off or braking fails, the time relay K2
limits the maximum runtime, in order to always grant safe switching off the power
supply when the set time value has been reached. The option of stopping via the
emergency stop function as shown in the example circuit "Application 4" need not
necessarily be provided. The motion system can also be ramped down by a control
instruction or by a mechanical brake.
Please make sure that the timing element (time relay) grants safe switching off.
Following this example, "Safe Standstill" (according to EN 954-1 Category 1) with
Stop Category 1 (according to EN 60204) can be set up, if all safety devices involved
also meet the requirements of Category 1.
Yet, the Safety Limited Acceleration (SLA) standard is not met.
E2
COM
E1
X73 X83
E2
COM
E1
JetMove (D)2xx
Contact
for the
Safety
Device
/Brakes
21
22
13
14
13
14
n>0
K1
A1
A2
K2
A1
A2
K1
K1
K2