Rockwell Automation T8449 Trusted TMR 24V dc Valve Monitor Module - 40 Channel - Manual (Page 43)

Trusted
TM
Module T8449
Issue 13 Apr 10 PD-T8449 43
6. Safety Considerations
The Trusted TM TMR 24Vdc Valve Monitor Module is currently TUV certified for Risk Class 6 safety
critical outputs. A single Trusted TM TMR Valve Monitor module may be used in both de-energise to trip,
and energise to trip safety critical applications.
6.1.1. Line Monitoring Configurations
If energise to trip outputs are used in safety critical applications, line fault status shall be monitored by
the system application and alarmed to plant operations personnel.
6.1.2. Module Configuration
In the System Configuration Manager there are configurable module settings that shall be required or
shall not be utilised on safety critical outputs. Where applicable, specific notes are used to bring
attention to these requirements in the configuration description.
6.1.3. Locking and Forcing Control Outputs
When the control output channel command is locked from the IEC 1131 Toolset, the corresponding
test initiation signal should be locked as well (i.e. always lock outputs in their control output / feedback
input pairs). The Safety section of the Trusted
TM Safety Manual contains additional information about
locking and forcing of outputs.
6.1.4. Additional Safety Considerations
For additional safety considerations regarding the overall Trusted TM system, please refer to the Safety
section of the Trusted TM Safety Manual.