A-B 825-PR12D

This manual describes how to use 1756 ControlLogix® Digital Safety I/O

modules in Logix 5000™ control systems.

Make sure that you are familiar with the following:

• Use of a safety controller in a Logix 5000 control system.

• Use of safety systems.

• Use Studio 5000 Logix Designer® application environment.

Description:

You can use the 1756-OBV8S modules only in single-channel Point Operation

Type while in bi-polar mode. Bi-polar single channel Point Operation Type

consists of a P-M pair. P is the sourcing terminal, and M is the sinking terminal.

In sourcing mode, you can configure single channel or dual-channel Point

Operation Type. In sourcing, dual-channel Point Operation Type, both channels

must always be in the same logical state.

Dual-channel Point Operation Type is typically used when both safety outputs

are controlling the same load. Rockwell Automation recommends configuring

the module for dual-channel Point Operation Type in dual-channel applications

because it decreases the dangerous undetectable failure rate (λDU)within the

module.

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Tel.: +86 13338369201

Skype: +86  13338369201

WhatsApp: +86  13338369201