System Software Versions; Categories In Accordance With En 954-1; Digital Inputs (Di2) - Pilz PSS Series Operating Manual

Safety

System software versions

The following system software is required in order to configure the module:
• PSS SW PG from Version 4.0
• PSS WIN-PRO from Version 1.0
Please contact Pilz if you have an older version of the system software.

Categories in accordance with EN 954-1

WARNING!
Please note: To achieve the corresponding category or requirement class,
the whole system including all safety-related components (parts, devices,
user program etc.) must be included in the assessment. For this reason,
Pilz cannot accept liability for the correct classification into a category or
requirement class.

Digital inputs (DI2)

Depending on the application area and its respective regulations, the
inputs may be used without test pulses for applications up to Category 3 in
accordance with EN 954-1. The possibility of a short circuit occurring in the
external wiring between different inputs or against L+ must be eliminated
through appropriate wiring.
For Category 4 applications, shorts between the input contacts must be
detected. This can be achieved through the use of test pulses on the PSS
or, depending on the type of input device, through a feasibility test or
through detection of shorts across the contacts on the input device (e.g.
light barrier) (for connection examples please see Chapter 5, "Wiring").
3-2 Operating Manual: PSS(1) DI2O Z