Safety Instructions For The "Safe Standstill" Function - Parker Compax3S025V2 Operating Instructions Manual

Compax3 device description
3.9.3.

Safety instructions for the "safe standstill" function

70
Safety functions must be tested 100%.
Only qualified staff members are permitted to install the "Safe Standstill" feature
and place it in service.
For all applications in which the first channel of the "Safe Standstill" is
implemented by means of a PLC, care must be taken that the part of the program
that is responsible for current flowing to or not flowing to the drive is programmed
with the greatest possible care.
of Compax3 with fieldbus should be considered.
The designer and operator responsible for the system and machine must
refer programmers who are involved to these safety-related points.
Terminal X4/2 (GND 24 V and at the same time the reference point for the safety
relay bobbin) must be connected with the PE protective lead. This is the only way
to ensure protection against incorrect operation through earth faults (EN60204-1
Section 9.4.3)!
All conditions necessary for CE conform operation (see page 15) must be
observed.
It should be noted in connection with the "Safe Standstill" application example
illustrated here that after the Emergency Power-off switch has been activated, no
galvanic isolation in accordance with EN 60204-1 Section 5.5 is guaranteed. This
means that the entire system must be disconnected from the mains power supply
with an additional main switch or mains power contactor for repair jobs. Please
note in this regard that even after the power is disconnected, dangerous electrical
voltages may still be present in the Compax3 drive for about 5 minutes.
When using an external Emergency power-off module with adjustable delay time,
(as illustrated in the "Safe Standstill" application example), it must be ensured
that the delay time cannot be adjusted by persons not authorized to do so (for
example by applying a lead seal).
The adjustable delay time on the Emergency Power-off module must be set to a
value greater than the duration of the braking ramp controlled by the Compax3
with maximum load and maximum speed.
If the setting range for the specified Emergency power-off module is not
sufficient, the Emergency power-off module must be replaced by another
comparable module.
All safety-related external leads (for example the control lead for the safety relay
and feedback contact) must absolutely be laid so they are protected, for example
in a cable duct. Short circuits and crossed wires must be reliably excluded!
If there are external forces operating on the drive axes, additional measures are
required (for example additional brakes). Please note in particular the effects of
gravity on suspended loads!
If the power fails, the possibility must be considered that for the application with
stop category K1, such as is described in the application example, it will no longer
be possible to execute the braking ramp controlled to speed 0.
It is important to note that if the drive is being activated (Energize) by the RS232
(RS485) interface, it may not be possible to execute switch-off by a controlled
braking ramp. For example, this is true when the set-up window of the C3
ServoManager is used. If set-up mode is turned on, the digital I/O interface and
fieldbus interface are automatically disabled.
192-120101 N11 C3I11T11 November 2007
Positioning via digital I/Os
The "Safe Standstill" application example