Connecting precautions. ABB BSR10, Sentry BSR10

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Connecting precautions

Warning!

Disconnect the power supply before attaching or removing the connection blocks.

Make sure that connection blocks and wires are clearly marked for correct connections. Use applicable requirements in IEC 60204‑1 for wire connections. Make sure that the wires are fitted with crimp terminals or ferrules before connection, unless solid copper conductors are used.

For connections of relay output contacts: Make sure that all power supplies or signal sources are connected to one side of the safety relay and that all power consumers or signal receivers are connected to the opposite side of the safety relay.

Make sure to use at least one of the following methods to ensure correct wire protection against short circuits for the safety relay outputs:

• The wires are permanently connected and protected against external damage, for example by wire ducts or other types of covers for protection.

• Use of separate multi-core wires.

• Use of cables with wires being individually shielded with earth connection.

The safety requirement is that fuses shall be used on the relay outputs.

Connection blocks

The connection blocks on the safety relay are detachable to simplify installation and replacement. The safety relay can be ordered with two different types of connection blocks, screw compression type or push-in type.

Coding the connection blocks

The coding kit is used to make each connection point individual to avoid faulty connection.

Place the coding parts in an specific order on the connection block and match these with the pin header.

• The risk assessment must include the risk of mistakes when using the connection blocks without coding.

• If coding is used, a test of the outcome of the coding against the identified risks must be done.

2TLC010060M0201 Rev.G

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