3.10.3. Safety Instructions For The "Safety Torque Off" Function; N5 C3I22T11 June - Parker Compax3 Series Operating Instructions Manual

Compax3 device description

3.10.3. Safety instructions for the "safety torque off" function

80
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 implemen-
ted 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.
pax3 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 16) must be ob-
served.
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 compa-
rable 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 Servo-
Manager is used. If set-up mode is turned on, the digital I/O interface and fieldbus
interface are automatically disabled.

192-120114 N5 C3I22T11 June 2008

The "Safe Standstill" application example of Com-
C3I22T11