4-29
Safe Torque Off
AC890PX AC Drive
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. The user must select and assess appropriate equipment.
* Note 1: Refer to manufacturers instructions for wiring and earthing detail.
Note: On power-up, the Safety Control Unit outputs are OPEN; thus STO is requested of the 890. 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
X15/02 X15/03 X11/01 X11/03 X11/06 X14/03
X11/02 X11/04 X11/05 X14/04
DRIVE START
DRIVE STOP
890 STO
RESET
KA1
SAFETY
DEMAND
KA1
A1 Y12 Y11 Y10 Y21 Y22 13 47 57
POWER
SUPPLY
Note 1 *
SAFETY CONTROL UNIT
A2 PE Y33 Y34 14 48 58
THIS WIRING MUST BE WITHIN THE CONTROL CUBICLE.
24VDC
0V
Summary of Contents for AC890PX Series
Page 17: ...2 5 Product Overview AC890PX AC Drive 890PX bottom wire entry ...
Page 144: ...The Keypad 7 9 AC890PX AC Drive The Menu System Map ...
Page 145: ...7 10 The Keypad AC890PX AC Drive The Menu System Map continued ...
Page 328: ...Programming D 88 AC890PX AC Drive Functional Description ...
Page 386: ...Programming D 146 AC890PX AC Drive Setpoint Drive Frequency Frequency 1 Frequency 2 ...