Optronics PG11 - Analog Safety Output

7.3 Analog Safety output
All analogue output values in the table below have a ± 0.25 mA range applied, and are in
accordance with recommendations by NAMUR NE043 (2003) and NE107 (2017).
Table 4. Description of the Detector analog output.
Status type
Output
Priority*
Default
output setting
Configurable
values**
Comment
Over range
4***
20 mA
20 or 21 mA
Signalled if gas concentration is measured above the configured
range.
Default the detector is to signal 100 %FS (20 mA) and not over
range since high concentrations of gas do not have a negative
effect on the detector.
Normal
Operation
3***
4 - 20 mA
Not
configurable
The current loop output is configured such that 4 mA
represents 0%FS and 20 mA represents 100% FS.
Maintenance
Request
5
3 mA
1 - 3.5
Output if optics is getting dirty and it is recommended to clean it
soon. Detector is still detecting gas inside specification.
***Will output gas value if detection above 7 %FS.
Out of
Specification
6
3 mA
Signalled if temperature is above or below rating of this
Detector. Detector will measure gas, but the accuracy of the Gas
Detection might be outside specification.
***Will output gas value if detection above 7 %FS.
Function
Check
2
2 mA
This value is activated if the Operator has set the detector into
Service mode. For example if a loop test is performed by the
Operator.
Failure
1
1 mA
No gas detection due to one of the following:
● Detector is booting up
● Beam Block
● Faulty detector. Please consult chapter “10
Troubleshooting”.
< 0.5 mA
Power supply fault or not booted up.
No gas detection and no HART communication.
*A lower number will be prioritized first.
**Configurable through HART or Modbus RTU.
Document 022-80036-OM Revision R03 Page 35 of 48