2700356 PHOENIX

Phoenix 2700356 Relay Input Module

Brand： PHOENIX Model number：2700356

Country of origin:Germany Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

Phoenix Contact Relay Input Modules, such as those within the RIFLINE Complete or PLC-INTERFACE series, consist of a modular assembly comprising a plug-in relay, a DIN-rail terminal socket, an integrated interference suppression circuit, and a visual status LED. The module acts as an electrical buffer, receiving incoming switching signals from pushbuttons, limit switches, proximity sensors, or auxiliary contacts located in harsh industrial environments. When an input voltage energizes the internal relay coil, the switching mechanism closes or opens the output contacts, passing a clean digital state to the controller input card. This setup prevents electrical noise, voltage spikes, and ground loops from entering sensitive control cabinets while ensuring reliable signal detection across long cable runs.

Product Parameters

Input Nominal Coil Voltage: Options include standard control voltages such as 12 VDC, 24 VDC, 48 VDC, 110 VDC, 24 VAC/DC, 120 VAC, and 230 VAC.
Coil Power Consumption: Low power intake typically ranging between 170 mW and 500 mW depending on coil rating and model selection.
Output Contact Configuration: Available in 1 N/O (Single Pole Single Throw - SPST) or 1 PDT/SPDT (Single Pole Double Throw) contact arrangements.
Maximum Switching Voltage: Up to 250 VAC/DC across output contacts.
Continuous Current Rating: Standard switching currents typically rated from 50 mA up to 6 A or 10 A depending on contact material and module frame.
Contact Material: Hard gold-plated silver alloy contacts for low-current signal switching, or silver tin oxide (AgSnO) for higher inductive load switching.
Galvanic Isolation: High test isolation voltage rating, typically 4 kV AC between the input coil and output contact circuit.
Response Times: Rapid operational performance with typical response times of 5 ms to 8 ms and release times of 7 ms to 10 ms.
Operating Temperature Range: Industrial broad operational range from -40°C to 60°C (-40°F to 140°F).
Wiring Connection Types: Push-in connection technology for fast, tool-free installation or conventional screw-clamp terminals.
Mounting Type: Standard NS 35/7.5 or NS 35/15 DIN rail mounting footprint.

Product Advantages

A key advantage of the Phoenix Contact Relay Input Module is its space-saving narrow design, with ultra-slim versions measuring as little as 6.2 mm in width, allowing high channel density inside compact control cabinets.

The modular plug-in electromechanical design permits effortless maintenance and relay replacement without disconnecting existing field wiring from the terminal socket block.

Integrated protective circuits, including freewheeling diodes for DC input coils or varistors for AC inputs, protect upstream switching components from inductive voltage surges.

Push-in terminal connection technology significantly reduces installation time and delivers vibration-resistant, maintenance-free wiring stability over extended operating cycles.

Gold-plated contact variants ensure reliable signal transmission even at extremely low voltages and milliamp-level currents by preventing contact oxidation over time.

Important Considerations and Precautions

When specifying and installing these modules, ensure that the selected input coil voltage matches the power output spec of the field sensor or control circuit precisely to prevent coil overheating or incomplete relay actuation.

For low-power PLC digital input cards, use relay modules with gold-plated contacts to prevent signal failure, as standard silver contacts require a minimum switching current to break through surface oxide layers.

Do not exceed the maximum continuous current or switching voltage ratings of the output contacts to prevent contact welding or premature contact erosion.

Ensure proper external fuse protection is installed on the output circuit to protect against short circuits in the field or connected control card.

Always verify that wire ferrule sizes conform to the specified connection range of the terminal block to maintain proper clamping force and electrical contact.

Disconnect primary system power before inserting or removing plug-in relays or modifying wiring to prevent electrical shock or equipment damage.

Product Applications

Phoenix Contact Relay Input Modules are widely deployed in industrial automation systems requiring clean signal isolation and voltage conversion between field elements and central controllers.

PLC and DCS Digital Input Conditioning: Interfacing 120 VAC or 230 VAC field limit switches and pushbuttons to low-voltage 24 VDC PLC digital input cards.
Signal Isolation and Level Matching: Isolating field sensor loops operating in noisy electromagnetic environments to protect central processing electronics from voltage transients and ground loops.
Factory Automation and Machinery: Transmitting operational status signals from motor starter auxiliary contacts, conveyor switches, and safety interlocks to main control systems.
Process Industry and Utilities: Coupling signals from flow switches, pressure transmitters, and temperature limiters in chemical plants, water treatment facilities, and power distribution stations.
Building Automation: Interfacing HVAC damper microswitches, lighting control relays, and security sensor contact outputs with building management systems (BMS).

2700356 PHOENIX

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