Pilz PSS SB HYD, Basic license - Manual (Page 42)

4-12
Intended Use
Modular Block System: Hydraulic Presses
SB072: Temporary suspension of safety functions
SB072 is a standard function block designed to temporarily suspend the
safety functions (ESPE/AOPD) without interrupting the process (muting).
SB072 was approved in accordance with the requirements of EN 61 496-1
Appendix A7.1, 06/98 (requirement of the function) and A7.2, 06/98
(requirement in case of failure).
For a limited period of time, and for a specific operational phase (e.g. for
feeding materials), it will suspend the effect of safety devices during the
working process. Once completed, it will reset the safety function.
Function:
• Muting via light barriers or limit switches
• Sequential and parallel muting mode
• Muting time is adjustable
• Muting timer can be interrupted
• Time monitoring of the muting limit switch
• Monitoring of ESPE/AOPD with two N/O contacts
INFORMATION
Input circuitry: Category 4 ESPE/AOPDs with semiconductor outputs must
be connected to DI 2 inputs (e.g. input module PSS(1) DI 2) in order to
meet the requirements of category 4.
SB075: Controlling and monitoring safety gates with guard locking
SB075 is designed for controlling and monitoring a safety gate with guard
locking. SB075 meets the requirements of category 4, in accordance with
EN 954-1, 03/97. It can monitor a safety gate with one or two switches and
control and monitor a guard locking device. The safety gate is monitored in
almost exactly the same way as on blocks SB064 and SB066.
INFORMATION
On SB075, the SSNR may lie in the range of 1 to 600.