ABB Relion 650 Series Commissioning Manual page 98

Section 6
Troubleshooting
90
• In LHMI, select Main menu/Tests/Binary input values/Binary input
modules. Then navigate to the board with the actual binary input to be
checked.
• With PCM600, right-click the product and select Signal Monitoring.
Then navigate to the actual I/O board and to the binary input in question.
The activated input signal is indicated with a yellow-lit diode.
• Measure output contacts using the voltage drop method of applying at least the
minimum contact load given for the output relays in the technical data, for
example 100 mA at 24 V AC/DC.
Output relays, especially power output relays, are designed for
breaking high currents. Due to this, layers of high resistance
may appear on the surface of the contacts. Do not determine
proper functionality of connectivity or contact resistance by
measuring with a regular hand-held ohm meter.
A
1
GUID-BBAEAF55-8D01-4711-A71D-BBC76B60BA3D V1 EN
Figure 15: Testing output contacts using the voltage drop method
1 Contact current
2 Contact voltage drop
3 Load
4 Supply voltage
V
2
3
4
1MRK 511 209-UEN -
REC650
Commissioning Manual