•
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
2
3
4
V
GUID-BBAEAF55-8D01-4711-A71D-BBC76B60BA3D V1 EN
Figure 7:
Testing output contacts using the voltage drop method
1 Contact current
2 Contact voltage drop
3 Load
4 Supply voltage
Section 5
1MRS756801 A
Troubleshooting
34
630 series
Commissioning Manual
