Jetter JM-208-480-OEM, User Manual, Page: 96 / 128

13 Safe Standstill (Option)
96 Jetter AG
13.2 Motion System JM-208-480-S1
The following figure is to demonstrate the basic setup of a motion system using a
servo amplifier JM-208-480-S1 equipped with the "Safe Standstill" function.
Fig.: 23: Motion system using a servo amplifier JM-(D)2xx
The digital servo amplifier JM-208-480-S1 has been designed for being installed in
a control cabinet. The power for driving the motor is supplied by a one-phase mains
system. Further, a safe extra-low voltage (SELV) of 24 V supplies the control
electrics. Via various inputs and outputs of a digital signal interface, communication
with higher-level control elements is established; these control elements issue the
motion commands for the motor, receive status reports and forward them, if
necessary. Usually, the motor has been mounted at or within a machine outside the
control cabinet. It is connected via a cable to the JetMove 208-480-S1. For reporting
the position, it has got an actual position value encoder. The mechanic load to be
driven has been mounted to the motor shaft.
A safety switching device acts on the electronics of the JetMove via the control inputs
"ENABLE1" and "ENABLE2". When "Safe Standstill" has been activated, the motor
is de-energized in a way that the torque is safely OFF. Yet, this does not mean that
there is a safe electric isolation. If a safe electric isolation is necessary, an additional
isolating device for interrupting the power supply (e.g. main circuit breaker) according
to EN 60204 must be installed.
JM-(D)2xx
Control cabinet
Mech. load
to be
driven
Motor
Encoder signals
Motor lines
V
o
lta
ge
su
pp
ly
2
4
V
D
ig
ita
l c
on
tr
ol
in
te
rf
a
ce
P
o
w
er
s
u
pp
ly
Input
“Safe Standstill”