Schweitzer Engineering Laboratories SEL-352-1 - Output Contacts

2-12 Installation Date Code 20010731
SEL-352-1, -2 Instruction Manual
Output Contacts
Four types of output contacts are available with various input/output board configurations.
The SEL-352 Relay main board has eight standard independent output contacts OUT101 through
OUT107 and ALARM. Output contact and optoisolated input options are discussed in Optional
Interface Boards at the end of this section. The following diagrams and descriptions present the
various output contacts available. The contact diagrams are identical for both terminal block and
Connectorized relay types. They are illustrated here as they apply to a terminal block version.
Standard independent dry output contacts that are not polarity dependent are represented by
Figure 2.9.
Figure 2.9: Standard Independent Output Contact Representation
Standard dry output contacts that share a common terminal for each pair of contacts, but are not
polarity dependent, are represented by Figure 2.10:
Figure 2.10: Standard Shared Terminal Output Contact Representation
High Current Interrupting dry output contacts are polarity dependent and are represented by
Figure 2.11. Notice the polarity mark above terminal A02. Reversed polarity appears as a short
across the contact terminals.