Ss1 Implementation Using Safety Control Unit - Parker AC30P User's Product Manual

6-24
Safe Torque Off

SS1 IMPLEMENTATION USING SAFETY CONTROL UNIT

This Safe Stop 1 (SS1) implementation causes the drive to come to rest in a controlled manner, and STO is actioned after a time delay determined by
the safety delay relay. This conforms to SS1 defined in EN61800-5-2:2007 para 4.2.2.3 c). The example shows wiring and terminal numbering for a
Siemens 3TK2827, but similar products are available from other vendors. Use of this Siemens part does not imply it is suitable for the user's application.
The user must select and assess appropriate equipment.
POWER
SUPPLY
Note: On power-up, the Safety Control Unit outputs are OPEN; thus STO is requested of the inverter. This responds by energising KA1 if both channels
are active and healthy. KA1 is used as a self-check for the reset cycle of the Safety Control Unit. If a reset cannot be achieved due to KA1 being de-
energised, a fault may be present and must be resolved by the user before relying on the STO function. See Fault Operation on page 6-14.
SAFETY
DEMAND
A1 Y10 Y11 Y12 Y21 Y22
SAFETY CONTROL UNIT
A2 PE Y33 Y34
RESE
KA1
T
THIS WIRING MUST BE WITHIN THE CONTROL CUBICLE.
DRIVE STOP
13 47 57
14 48 58
24VDC
DRIVE
START
X13/02 X12/01 X10/01 X10/03 X10/06
INVERTER STO
X10/02 X10/04 X10/05
KA1
AC30 series Variable Speed Inverter
X12/05
X12/06