Commissioning for functional safety standards compliance
Introduction
In a Functional Safety Standards-compliant installation, you must test the complete device and system setup before deployment of the installation.
Commissioning process
Stage | Description |
---|---|
1 |
Validate the device wiring to the description in the Product Installation and Wiring section. See Product installation and wiring. NOTE: Make sure that the exclusion logic is implemented
in the PLC or the control circuit to ensure a correct insulation alarm
detection.
|
2 |
Validate the device settings to the description in the Product Setup. See Safety standards compliance requirements. NOTE: Make sure that the exclusion logic is implemented
in the PLC or the control circuit to ensure a correct insulation alarm
detection.
|
3 | Validate the insulation monitoring with exclusion management. |
Insulation monitoring and insulation fault detection testing
-
When the device is powered off, make sure that inputs of the PLC or the control circuit as per the product installation and wiring section. See Safety standards compliance requirements.
-
Connect a resistor between the monitored network and the earth and check the measurement:
-
When the resistor value is alarm threshold +20%, no alarm is generated.
-
When the resistor value is alarm threshold -20%, an alarm is generated.
NOTE: This test must be done offline and install under test disconnected from system. -
-
Check that the alarm relay toggles according to the resistance used for the test.