Endress+Hauser HART Proline Promass 500, Special Documentation

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Proline Promass 500 Use in protective systems
Hauser 19
NOTICE
The measuring device's safety-related signal is the 4–20 mA analog output signal
(output; input 1).
All safety measures refer to this signal exclusively.
‣
Please note the following: →  15.
NOTICE
When the SIL locking code is entered, the device parameters that affect the safety-
related output signal are locked and write-protected. It is still possible to read the
parameters.
When SIL locking is enabled, restrictions apply on all communication options, such as the
service interface (CDI-RJ45), HART protocol and WirelessHART protocol, local display and
WLAN.
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Deactivation of the SIL mode →  29.
6 Use in protective systems
6.1 Device behavior during operation
6.1.1 Device behavior during power-up
Once switched on, the device runs through a start-up phase. The current output is set to
failure current during this time. This current is ≤ 3.6 mA in the initial seconds of this start-up
phase.
No communication with the device is possible via the interfaces during the start-up phase.
After the start-up phase the device switches to the normal mode (measuring operation).
6.1.2 Behavior of device during operation
The device outputs a current value which corresponds to the measured value to be monitored.
This value must be monitored and processed further in an attached automation system.
6.1.3 Device behavior in safety function demand mode
Depending on the setting of the Failure mode parameter, the current is as follows in demand
mode:
• For Min. option: ≤ 3.6 mA
• For Max. option: ≥ 21 mA
6.1.4 Device behavior in event of alarms and warnings
The output current on alarm can be set to a value ≤ 3.6 mA or ≥ 21 mA.
In some cases (e.g. a cable open circuit or faults in the current output itself, where it is not
possible to set the failure current ≥ 21 mA) output currents of ≤ 3.6 mA occur irrespective of
the configured failure current.
In some other cases (e.g. short circuit of cabling), output currents of ≥ 21 mA occur
irrespective of the configured failure current.