AB 1756-PSCA2

WARNING: 

• This equipment is not resistant to sunlight or other sources of UV radiation.

• This equipment shall be mounted in an UKEX/ATEX/IECEx Zone 2 certified enclosure with a minimum ingress protection rating of at least IP54 (in 

accordance with EN/IEC 60079-0) and used in an environment of not more than Pollution Degree 2 (as defined in EN/IEC 60664-1) when applied in Zone 

2 environments. The enclosure must be accessible only by the use of a tool.

• This equipment must be used only with UKEX/ATEX/IECEx certified Rockwell Automation® backplanes.

• This equipment shall be used within its specified ratings defined by Rockwell Automation.

• Provision shall be made to prevent the rated voltage from being exceeded by transient disturbances of more than 140% of the peak rated voltage when 

applied in Zone 2 environments.

• The instructions in the user manual shall be observed.

• Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with 

this product.

• Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.

Description:

The redundant power supply system provides additional uptime protection for chassis that are used in critical applications. The two remotely mounted supplies are 

designed to share the current required by the chassis. Two supplies are available in AC (catalog number 1756-PA75R/A or 1756-PAXTR) and DC (catalog number 1756-PB75R/

A or 1756-PBXTR) versions that can be mixed or matched when used in tandem.

If one power supply fails, the remaining supply accommodates the entire load of the chassis without disruption to chassis activity. The ControlLogix® redundant power 

supply system is designed to account for operational anomalies in only the power supply (the chassis adapter and power supply cables are excluded).

The 1756-PSCA2 chassis adapter is a passive device. The chassis adapter funnels power from one or two ControlLogix redundant power supplies to the single power 

connector on the ControlLogix chassis backplane.

This publication contains the following new or updated information. This list includes substantive updates only and isn’t intended to reflect all changes.

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