Parker EME
Compax3 device description
192-120113 N08 C3I12T11 - December 2010
87
Access to the hazardous area
Actuate emergency power-off switch
Due to the interruption on two channels at the emergency power-off switch, the
safety switching device is deactivated - output Q3 is immediately “0”.
Channel 1:
Via the Energize input, the Compax3 devices receive the command to
guide the drive to a currentless state (using the ramp configured in the C3
ServoManager for "drive disable").
Channel 1 feedback 1:
The "Controller Feedback" Compax3 outputs supply
current to Relays K1 and K2.
Channel 2:
After the delay time set in the safety switching device, (this time must
be set so that all drives are stopped after it has elapsed) the output Q4 = “0”, which
in turn deactivates the Enable inputs ENAin of the Compax3 devices.
Channel 2 feedback:
Via the series circuit of all feedback contacts, the “Safe
Torque-off” status (all Compax3 devices without current) is reported.
Only if the drives are all at a standstill, the safety door may be opened and the
hazardous area may be accessed.
If the safety door is opened during operation and the emergency-power-off switch
was not triggered before, the Compax3 drives will also trigger the stop ramp.
Caution! The drives may still move.
If danger to life and limb of a person entering cannot be excluded,
the machine must be protected by additional measures (e.g. a safety
door locking).
3.10.2.5
Technical Characteristics STO Compax3S
Safety technology Compax3S
Safe torque-off in accordance with EN
ISO 13849: 2008, Category 3, PL d/e
Certified.
Test mark IFA 1003004
For implementation of the “protection
against unexpected start-up” function
described in EN1037.
Please note the
circuitry examples
(see
on page 77).
Compax3S STO (=safe torque off)
Nominal voltage of the
inputs
24 V
Required isolation of the
24V control voltage
Grounded protective extra low voltage, PELV
Protection of the STO
control voltage
1 A
Grouping of safety level
STO switch-off via internal safety relay & digital
input:
PL e, PFHd=2.98E-8
STO switch-off via internal safety relay & fieldbus:
PL d, PFHd=1.51E-7
A MTTFd=15 of the external PLC and STO cycles/year
< 500 000 are assumed.
