Phoenix Contact EMG 12-REL/KSR-24/1 Relay Module

Description

Phoenix Contact EMG 12-REL/KSR-24/1 Relay Module

Product Dimensions：

The Phoenix Contact EMG 12-REL/KSR-24/1 (Item Number: 2949240) is a classic, highly reliable electromechanical interface relay module. It is engineered to establish a secure galvanic isolation barrier and handle signal matching between sensitive electronic control systems (like PLCs) and rugged field actuators.

Product Detailed Description

The EMG 12-REL/KSR-24/1 features a soldered-in, miniature monostable switching relay built directly into a compact 12 mm wide housing. Equipped with an AgNi (Silver-Nickel) contact material, it is specifically optimized for medium to large loads. The module accepts universal 24 V AC/DC control voltages, utilizing an integrated bridge rectifier to safely handle both AC and DC input signals seamlessly.

Technical Parameters

Product Advantages

• Universal Input Flexibility: Thanks to the built-in bridge rectifier, the control coil handles either 24 V AC or 24 V DC inputs without needing separate models or polarity considerations.
• Space-Saving Design: At only 12 mm wide, this module optimizes rail real estate inside compact control cabinets.
• Integrated Suppression & Display: Features a built-in yellow LED for clear status visibility and an internal protective circuit that dampens inductive surge feedback, protecting upstream PLC outputs.
• Zero Spacing Mounting: Engineered to allow multi-module row assembly with zero clearance spacing between units, maximizing terminal box density.

Important Considerations & Precautions

• Load Minimization Constraints: The AgNi contact material is designed for medium to large power loads. If you attempt to use this specific relay to switch micro-signals (e.g., dry contact inputs below 12 V / 100 mA), the contact resistance might cause intermittent signaling over time. For low-level signals, a gold-plated (AgNi+Au) contact version should be used instead.
• Environmental Temperature: The safe operating temperature range is -20°C to +40°C. Ensure adequate cabinet ventilation if multiple units are active simultaneously in high-temperature environments.
• Life Cycle Limitations: Being an electromechanical device, it has a mechanical service life of roughly 2 \times 10^7 cycles. For exceptionally high-frequency switching loops, consider upgrading to a solid-state relay (SSR).

Product Applications

The EMG 12-REL/KSR-24/1 is widely used as a standard interface component across industrial automation:

• PLC Input/Output Isolation: Acting as an interposing buffer relay to protect delicate PLC transistor outputs from high field-side switching spikes.
• Control Valve Actuation: Driving 230 V AC or 24 V DC solenoid valves in fluid control systems.
• Motor Contactor Interfacing: Activating the larger coil current requirements of heavy-duty motor contactors from a low-power digital signal.
• Building Automation: Coupling lighting controllers, dampers, and security signal loops.

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