Control Circuit - ABB ATS021 Installation And Operating Instructions Manual

6. Connecting

6.2 Control circuit

When relay outputs are used with inductive loads (such as relays, contactors and
motors), they must be protected from voltage spikes using varistors, RC-protectors
(AC current) or DC current diodes (DC current).
Figure 6.2 Control circuit connections in ATS021
Installation and operating instructions, ATS021
1SDH000759R0002, L4106
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