EMG 12-REL-KSR-24-1 PHOENIX

Phoenix EMG 12-REL-KSR-24-1 Input module

Brand： PHOENIX Model number：EMG 12-REL-KSR-24-1

Country of origin:Germany Product weight：0.55kg

HS code：8517623990

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Product Details：

Product Dimensions：

The EMG 12-REL/KSR-24/1 functions as an interface relay module that provides secure galvanic isolation between low-voltage control circuits and higher-power application circuits. The module features an integrated input circuit that includes a status indicator and reverse polarity protection. It is designed to be mounted on standard DIN rails and features plug-in miniature relays embedded within the 12 mm wide EMG housing. The terminal layout is clearly labeled, ensuring straightforward point-to-point wiring during panel construction.

Product Parameters

Nominal Input Voltage: $24 \text{ V AC/DC}$
Input Voltage Range: Typically $0.8$ to $1.1$ times the nominal voltage
Typical Input Current: Approximately $21 \text{ mA}$ at nominal voltage
Operating Indicator: Yellow LED for clear visual status of the coil excitation
Contact Type: 1 Single-Pole Double-Throw (SPDT / 1 PDT) changeover contact
Contact Material: Silver cadmium oxide (AgCdO) or similar high-durability alloy optimized for power switching
Maximum Switching Voltage: Up to $250 \text{ V AC/DC}$
Limiting Continuous Current: $6 \text{ A}$
Maximum Inrush Current: Up to $8 \text{ A}$ for short durations
Housing Width: $12 \text{ mm}$
Degree of Protection: IP20 (intended for installation within a protective control enclosure)
Mounting Position: Any position on a standard $35 \text{ mm}$ DIN rail (NS 35)

Product Advantages

A key advantage of the EMG 12-REL/KSR-24/1 is its Excellent Electrical Isolation, which safely separates sensitive control logic from noisy or hazardous field power networks, preventing back-EMF from damaging PLC outputs. The Compact 12 mm Width allows users to maximize density within the electrical cabinet, saving significant rail space.

The inclusion of an Integrated Yellow LED simplifies commissioning and troubleshooting by offering immediate visual feedback on the state of the relay. Furthermore, the module includes Protective Circuitry (such as a freewheeling diode for DC operation), which dampens voltage spikes generated when the relay coil is de-energized, protecting nearby solid-state devices.

Important Considerations and Precautions

When installing and operating the EMG 12-REL/KSR-24/1, you must ensure that the Coil Voltage matches the $24 \text{ V}$ specification, as under-voltage can cause intermittent contact chattering, while over-voltage will cause excessive thermal stress on the coil. During wiring, check that the Maximum Contact Ratings ( $6 \text{ A}$ , $250 \text{ V}$ ) are never exceeded, particularly when driving highly inductive loads like large solenoids or motors, which can create severe contact arcing and lead to contact welding.

Because the module is rated IP20, it must be mounted inside a clean, dry, and dust-free control cabinet to prevent ambient contamination from compromising the electrical terminals. Additionally, ensure that all Screw Terminals are Torqued Correctly according to Phoenix Contact standards; loose connections can increase contact resistance, generating localized heat that could deform the plastic housing over time.

Product Applications

The EMG 12-REL/KSR-24/1 is widely deployed as an interface component across multiple industrial automation fields.

PLC Output Interfacing: Amplifying low-current transistor outputs from a PLC to drive higher-current loads like contactors, valves, or heaters.
Signal Isolation: Separating different voltage potentials (e.g., matching a $24 \text{ VDC}$ control circuit to a $120 \text{ VAC}$ field device).
Factory Automation: Used within control panels for assembly lines, conveying systems, and packaging machinery to execute simple logic interlocking.
Building Automation: Interfacing HVAC controllers with fans, dampeners, and lighting control systems.
Process Infrastructure: Managing digital signaling states within water treatment plants and chemical distribution sub-panels.

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