SAFETY MANUAL - Tuv-fs.com
SAFETY MANUAL - Tuv-fs.com
SAFETY MANUAL - Tuv-fs.com
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<strong>SAFETY</strong> <strong>MANUAL</strong><br />
Pulse Generator<br />
8444, Triplicated,<br />
24VDC<br />
Zone Interface<br />
8448 Triplicated,<br />
24VDC<br />
Valve Monitor<br />
8449, Triplicated,<br />
24VDC<br />
TÜV Certified<br />
Configuration<br />
Not safety related but<br />
interference free<br />
Internal 2oo3<br />
(2oo3 implemented in<br />
a single module)<br />
Internal 2oo3<br />
(2oo3 implemented in<br />
a single module)<br />
Conditions<br />
Certified as non-interfering and can be used for nonsafety-critical<br />
devices.<br />
Outputs:<br />
Normally energized (de-energize to trip): certified<br />
SIL 3 or AK6.<br />
Normally de-energized (energize to trip): certified<br />
only for applications that fulfil the requirements<br />
under section 3.2.4.<br />
May be used in single module or master/slave<br />
configurations.<br />
Inputs:<br />
Normally de-energized (energize to trip): only for<br />
applications that fulfil the requirements under<br />
section 3.2.4, and only for “trip amplifier” (like gas<br />
inputs) or quasi digital inputs (like fire loops).<br />
Normally energized (de-energize to trip): certified<br />
only if the inputs are dynamically transitioned at a<br />
period not greater than the second fault occurrence<br />
time.<br />
Analog measurements: certified only if the input is<br />
dynamically exercised over its full range within a<br />
period shorter than the second fault occurrence<br />
time 3 .<br />
Non-interfering for non-safety-critical devices<br />
Outputs:<br />
Normally energized (de-energize to trip): certified<br />
SIL 3 or AK6.<br />
Normally de-energized (energize to trip): certified<br />
only for applications that fulfil the requirements<br />
under section 3.2.4.<br />
Safety critical valve may only be tested towards the<br />
safe position.<br />
May be used in single module or master/slave<br />
configurations.<br />
Inputs:<br />
Certified as non-interfering and can be used for nonsafety-critical<br />
devices.<br />
Table 4 - Multi-purpose Modules, High Density I/O<br />
3 The analog input must be exercised over it’s full range (i.e. 0 to 4095) over a period of time related to the<br />
safety accuracy specification of the module and the discrepancy detection time configured for the<br />
system. For typical systems, the discrepancy detection time is 200 seconds.<br />
Doc No P8094 Page 40 of 67<br />
Issue 14 September 2003
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