Phoenix EMG Series Selection Guide: Precise Matching of Part Number, Model, and Application

Opening: Efficient Industrial Automation Component Selection – One-Stop Part Number & Model Reference

In industrial automation systems, reliable relay modules, diode isolation blocks, and auxiliary components are essential for signal processing, safety control, and system protection. The Phoenix EMG series offers comprehensive solutions for industrial control with its versatile relay modules, robust diode protection, and flexible accessory components. This guide integrates part number-to-model correspondence with detailed functional descriptions and application scenarios to provide clear selection guidance for technical teams and procurement professionals, helping you quickly identify the right components for your automation needs.

I. EMG Series Product Families & Core Advantages

The EMG series consists of several specialized product families designed for different industrial automation applications:

All EMG components feature industrial-grade durability (operating temperature: -20°C to +50°C), screw connection terminals (compatible with 0.2-4mm² wires), and DIN rail mounting for easy installation and maintenance in harsh factory environments .

II. Complete Product Series Selection Table

1. EMG 45-RELS/IR1 Series: Relay Sockets for Industrial Relays

2. EMG 45-REL/IR Series: Integrated Relay Modules

3. EMG 45-DIO Series: Diode Isolation & Protection Blocks

4. EMG 45-H Series: Transparent Protective Covers

5. EMG 37-RELS Series: Compact Relay Bases

6. EMG 30 Series: Setpoint Adjusters, Power Supplies & Switches

III. 3-Step Quick Selection Technique

Step 1: Identify Application Type

• Relay switching needs:

  • High-load industrial control → EMG 45-RELS/IR1 series (4 changeover contacts)
  • Compact control panels → EMG 37-RELS series (2 changeover contacts)
  • Integrated solutions → EMG 45-REL/IR series (built-in relay with protection)

• Signal isolation/protection:

  • General-purpose isolation → EMG 45-DIO series with 1N4007 diodes
  • High-voltage protection → EMG 45-DIO series with 1N5408 diodes (up to 1000V reverse voltage)
  • Fault reporting systems → EMG 45-DIO14P (14 diodes, common cathode)

• Component protection/accessories:

  • Dust/touch protection → EMG 45-H series transparent covers
  • Parameter adjustment → EMG 30 series setpoint adjusters
  • Power supply → EMG 30-NZG/G24/SI 24V DC power unit

Step 2: Determine Voltage & Connection Requirements

• Voltage selection:

  • 24V DC systems → models with "-G 24" or "-W 24" suffix
  • 230V AC systems → models with "-W230" suffix
  • 220V DC systems → models with "-G220" suffix

• Connection preferences:

  • Screw terminals (standard) → all EMG series accept 0.2-4mm² solid or 0.2-2.5mm² stranded wires
  • Special wiring needs → select appropriate model variant (P=common cathode, M=individual wiring)

Step 3: Choose Additional Features

• LED indication: Most models have built-in LEDs for status monitoring
• Protection circuitry:
  • Diode protection (HWR) → suppresses voltage spikes from inductive loads
  • Polarity protection → prevents damage from reverse voltage connection
• Profile options:
  • Standard profile → most models
  • Low profile (LP) → for space-constrained applications (e.g., EMG 45-DIO14M/LP)

IV. Recommended Industry-Scenario Combinations

V. Selection Pitfall Avoidance Guide

1. Ignoring load capacity: Ensure the relay module can handle your application's voltage and current requirements. EMG 45-RELS/IR1 series supports up to 10A per contact, while EMG 37-RELS series supports up to 5A .

2. Underestimating protection needs:

   • Always use diode protection (HWR variant) for inductive loads (motors, solenoids) to prevent voltage surges
   • For high-voltage applications, choose 1N5408 diode variants (up to 1000V reverse voltage) instead of standard 1N4007

3. Neglecting space constraints:

   • In compact panels, use EMG 37-RELS series instead of 45-RELS series (saves ~30% space)
   • For diode blocks, select LP (low profile) variants where height is restricted

4. Mismatching voltage requirements: Double-check voltage compatibility. Mixing AC/DC or incorrect voltage levels will damage the module

5. Overlooking connection types:

   • Common cathode (P) variants are ideal for parallel signals
   • Individual wiring (M) variants offer more flexibility for complex circuits

Conclusion: Choose the Right EMG Components for Reliable Automation

The Phoenix EMG series provides versatile, reliable solutions for industrial automation with its comprehensive lineup of relay modules, diode protection blocks, and auxiliary components.