2754341 IBS ST 24 BK-T PHOENIX

Phoenix Contact Digital Input Modules convert physical binary signal levels from the field into digital data processing levels used by programmable logic controllers (PLCs) and distributed control systems (DCS). They feature optical isolation between field inputs and internal logic circuitry to protect sensitive electronics from high-voltage surges and noise. The modules are built with push-in or screw-terminal connection technologies, allowing fast and tool-free wiring. Available in various channel densities ranging from 4 to 32 channels per module, they integrate into compact control cabinets using standard DIN rail mounting. Many variants feature channel-specific LED diagnostics to provide real-time visual monitoring of input signal states directly on the hardware.

Product Parameters

• Input Channel Density: Ranging from 4, 8, 16, to 32 digital channels per module depending on the specific model series.

• Nominal Input Voltage: Standard 24 VDC, with specific model variations supporting 120 VAC or 230 VAC inputs.

• Input Signal Type: Designed for Type 1, Type 2, or Type 3 binary inputs in accordance with IEC 61131-2 standards.

• Signal Delay Times: Configurable hardware filtering with typical response times ranging from 50 microseconds to 3 milliseconds to prevent switch bounce.

• Electrical Isolation: Galvanic isolation between field input circuits and internal bus system up to 500 VAC or 1000 VAC.

• Current Consumption: Typical input current of 2 mA to 5 mA per active input channel at 24 VDC.

• Connection Technology: Push-in direct connection technology or traditional screw terminals supporting wire gauges from 0.2 to 1.5 mm².

• Operating Temperature Range: Standard models operate from -25°C to 60°C (-13°F to 140°F), with extended temperature versions available up to 70°C (158°F).

• Protection Class: IP20 rated for cabinet mounting, with IP67 field-mountable variants available for cabinet-free installation.

• Diagnostic Indicators: Individual status LEDs per channel for signal state display, along with module-level LEDs for power and bus communication status.

Product Advantages

Phoenix Contact Digital Input Modules feature Push-in Technology that significantly reduces wiring time and minimizes installation errors during assembly.

Their ultra-thin design and high channel density optimize control cabinet space, reducing overall footprint requirements in space-constrained installations.

High galvanic isolation and robust electromagnetic compatibility ensure reliable signal transmission even in harsh industrial environments prone to electrical interference.

The modular system design allows easy scaling and expansion, enabling engineers to adapt I/O configurations to changing operational requirements without re-wiring existing systems.

Clear channel labeling and integrated diagnostic LEDs streamline system commissioning and reduce downtime during maintenance troubleshooting.

Important Considerations and Precautions

Ensure that input signal voltages match the specific input rating of the module to avoid permanent damage to internal optical couplers.

Proper grounding of shield connections and system reference potentials must be maintained to prevent ground loops and electromagnetic noise interference.

Wiring must adhere to specified wire cross-section limits and strip lengths to ensure secure contact inside push-in terminal blocks.

Modules must be powered down or put into safe maintenance mode before insertion or removal from the backplane bus to prevent signal glitches or bus communication failures.

When installing high-density input modules, total power consumption and heat dissipation within the enclosure must be calculated to prevent exceeding maximum operating temperature limits.

Product Applications

Phoenix Contact Digital Input Modules are deployed across automated manufacturing, infrastructure, and process industries to monitor binary field states.

• Factory Automation and Assembly Lines: Monitoring the status of optical sensors, limit switches, safety interlocks, and operator pushbuttons across conveyor and robotics systems.

• Machine Building and OEMs: Interfacing discrete machine sensors, pressure switches, and position monitors directly with embedded machinery controllers.

• Process Industry and Water Treatment: Collecting binary feedback signals from valve limit switches, tank level floats, and pump fault contacts in chemical plants and municipal facilities.

• Building Infrastructure and HVAC: Monitoring door contact sensors, filter clog switches, and manual override switches in facility management systems.

• Energy and Power Distribution: Interfacing auxiliary contacts on circuit breakers, disconnect switches, and protective relays with substation automation controllers.

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