Product specifications

SM811 and TP868 Appendix A Hardware Units
282 3BSE036351-510 A
The High Integrity controller is able to run SIL3 applications using SM811.
Performing a Hot swap or inserting an additional/replacement SM811 into a running
system affects SIL3 applications.
The Module should be configured in order to get synchronized. When running SIL3
applications, the start of the synchronization must be accepted by the user, to
configure the inserted module.
If one or more SIL3 applications are running in the controller, they are temporarily
interrupted in order to get a consistent state of the application to the newly inserted
SM811. The user must acknowledge the application stop by creating a edge on
digital input 3 on the primary, already running, Safety Module.
Table 75. SM811 - Digital Output Specifications
Item Value
Electric isolation Yes
Overvoltage category II
Rated insulation voltage 50 V
Insulation test voltage 500 V a.c. 1 min
Nominal voltage 24 V
Process voltage range (UP) 12... 32 V
On-state output voltage (UA) UP - 0.5 V < UA <
UP
Maximum continuous load current 0.5 A
Off-state output leakage current < 10 mA
Maximum short circuit current < 2.4 mA
Output impedance < 0.4 ohm
For performing the hot swap of SM811 running a SIL3 application, the
Access
enable digital input (I2) must be turned ON through the key switch before
the Hot-insert digital input (I3) is turned ON.