1085256 PHOENIX

Phoenix 1085256 Basis unit

Brand： PHOENIX Model number：1085256

Country of origin:Germany Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

A Phoenix Contact Basis Unit acts as the passive backplane or socket base that mounts directly onto standard EN DIN rails. It routes power, control signals, and field wiring directly to plugged-in electronic components such as solid-state relays, electromechanical relays, or I/O processing slices. By decoupling the wiring interface from the active processing or switching element, the basic unit enables tool-free, hot-swappable replacement of active modules without disturbing field cabling. Depending on the specific series, basis units integrate Push-in connection technology (PT) or screw terminals, alongside integrated sockets for plug-in interference suppression, status indication, and cross-bridging accessories.

Product Parameters

Mounting Type: Standard NS 35/7.5 or NS 35/15 DIN rail snap-on installation.
Connection Technology: Push-in Technology (BPT/PT) or universal screw connection.
Nominal Operating Voltage: Typically ranges from 5 V DC up to 250 V AC/DC depending on the base series and application.
Nominal Current Capacity: Up to 13 A on relay bases and up to 15 A total module current on I/O base elements.
Supported Wire Cross-Sections: Conductor ranges from 0.14 mm² to 2.5 mm² (AWG 26 to AWG 14) for standard control wiring.
Housing Material and Flammability: Polyamide PA or PBT housing with UL 94 V0 or V2 flammability rating.
Degree of Protection: IP20 touch-proof protection rating according to IEC 60529.
Operating Temperature Range: Standard operational limits from -40°C to +70°C (-40°F to +158°F).
Pitch / Overall Width: Ultra-compact module widths starting from 6.2 mm for basic relay sockets up to standard modular widths for I/O carriers.

Product Advantages

Phoenix Contact Basis Units feature Push-in connection technology, allowing fast, tool-free wiring that reduces installation time by up to 50 percent while maintaining high vibration resistance.

The modular separation of the wiring base from active electronics ensures that system maintenance and device replacements can be performed rapidly without disconnecting any field wires.

Space-saving housing designs maximize panel density, enabling high-channel-count signal distribution in restricted control cabinet enclosures.

Integrated bridging channels allow quick power distribution across adjacent modules using standardized plug-in bridges, eliminating complex point-to-point jumper wiring.

High operational reliability and international certifications ensure long service life even in environments subject to continuous vibration, thermal stress, or electromagnetic interference.

Important Considerations and Precautions

Always ensure the total load current across the basis unit and adjacent plug-in bridges does not exceed the maximum rated current capacity specified for the specific model.

Verify that stripped conductor lengths and ferrule dimensions match the specific terminal connection guidelines to guarantee optimal mechanical retention and electrical contact.

When installing units in harsh industrial environments or explosive atmospheres, confirm that the selected basis unit holds the proper Ex or ATEX certifications for Zone 2 or Class I, Division 2 applications.

Ensure correct engagement of retention clips or locking levers when inserting functional modules into the basis unit to avoid contact resistance or accidental ejection due to machinery vibration.

Always disconnect main supply power prior to perform wiring changes or structural modifications on the DIN rail terminal assembly.

Product Applications

Phoenix Contact Basis Units are deployed across diverse industrial automation and control environments.

Control Cabinet Signal Interface: Serving as the connection layer between field sensors, actuators, and central PLC controllers in manufacturing automation.
Relay and Isolation Systems: Housing miniature power relays or solid-state switching modules for signal isolation, amplification, and matching in process control panels.
I/O Signal Marshalling: Organizing high-density control cables and field instrumentation signals in power plants, water treatment facilities, and chemical processing plants.
Building Automation: Interfacing HVAC controllers, lighting systems, and energy management monitors in commercial infrastructure installations.
Machine Building and Robotics: Providing compact, vibration-proof terminal connections on machine-mounted junction boxes and moving equipment sub-assemblies.

2901537 PHOENIX

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