Phoenix Contact EMUG/EMG Series: Industrial Relay & Interface Module Selection Guide
I. Series Overview: Reliable Signal Conditioning Solutions
The EMUG/EMG series provides industrial-grade relay and interface modules for automation control systems. EMUG specializes in multi-channel relay modules (up to 8 relays per unit), while EMG offers versatile signal conditioning solutions including diode blocks, single relays, and solid-state outputs. Designed for harsh industrial environments, these modules ensure reliable signal transmission and protection between control systems and field devices.
II. Product Series Matrix
1. EMUG Series: Multi-Channel Relay Modules
| Part Number |
Full Model |
Features |
Applications |
| 2943770 |
EMUG 45-8REL/KSR-G 24/1 |
8 relays, 24V DC power, gold contacts, surge protection |
Machine automation with multiple control signals |
| 2943767 |
EMUG 45-4REL/KSR-G 24/21 |
4 relays, 24V DC, changeover contacts, protective circuit |
PLC output expansion in control cabinets |
| 2942399 |
EMUG 22-4REL/KSR-G 24/1AU |
4 relays, 22mm width, 24V DC, Australian standard |
Compact control panels with limited space Phoenix Contact USA |
| 2943754 |
EMUG 22-4REL/KSR-G 24/1 |
4 relays, 22mm width, 24V DC, standard design |
General-purpose relay expansion Phoenix Contact USA |
2. EMG Series: Diode Modules (DIO Series)
| Part Number |
Full Model |
Features |
Applications |
| 2950064 |
EMG 22-DIO 7P |
7 diode positions, common cathode, 250V AC/700mA |
Protection circuits for inductive loads |
| 2950077 |
EMG 22-DIO 7M |
7 diode positions, common anode, 250V AC/700mA |
Signal rectification in control cabinets |
| 2952198 |
EMG 22-DIO 4P-1N5408 |
4 diodes (1N5408), common cathode, surge protection |
Motor control circuits |
| 2952211 |
EMG 22-DIO 4M-1N5408 |
4 diodes (1N5408), common anode, surge protection |
Sensor signal conditioning |
| 2952790 |
EMG 22-DIO 4E-1N5408 |
4 isolated diodes (1N5408), individual wiring |
High-noise industrial environments |
| 2950048 |
EMG 22-DIO 4E |
4 isolated diode positions, individual wiring |
Custom protection solutions |
3. EMG Series: Relay Modules (REL Series)
| Part Number |
Full Model |
Features |
Applications |
| 2946146 |
EMG 22-B4 |
4-pole terminal block, relay interface |
Connecting relays to control systems |
| 2946081 |
EMG 17-B3 |
3-pole terminal block, relay interface |
Small relay modules |
| 2947815 |
EMG 15-B3 |
3-pole terminal block, compact design |
Space-constrained applications |
| 2944782 |
EMG 12-REL/KSR-24/1AU |
Single relay, 24V DC, Australian standard |
General control applications |
| 2949240 |
EMG 12-REL/KSR-24/1 |
Single relay, 24V DC, standard design |
Signal isolation |
4. EMG Series: Special Function Modules
| Part Number |
Full Model |
Features |
Applications |
| 2310905 |
EMG 12-RC/10UF/100K |
RC circuit (10μF/100kΩ), timing function |
Pulse shaping, signal delay |
| 2948827 |
EMG 12-OV-24DC/240AC/1 |
Solid-state relay, input:24V DC, output:240V AC/1A |
Switching AC loads from DC control |
| 2948872 |
EMG 12-OV-230AC/240AC/1 |
Solid-state relay, input:230V AC, output:240V AC/1A |
Mains-powered control applications |
| 2948720 |
EMG 12-OV-5DC/60DC/1 |
Solid-state relay, input:5V DC, output:60V DC/1A |
Low-voltage to high-voltage conversion |
| 2948746 |
EMG 12-OV-24DC/60DC/1 |
Solid-state relay, input:24V DC, output:60V DC/1A |
Industrial automation outputs |
| 2942962 |
EMG 12-LG/SET |
LED indicator module with 7 segments |
Status display in control panels |
| 2947116 |
EMG 12-H 7.5MM KLAR |
Transparent housing, 7.5mm height |
Visible status indication |
| 2948306 |
EMG 12-B2 |
2-pole terminal block, basic interface |
Simple signal connections |
IV. Key Technical Parameters
1. Common Parameters for Both Series:
| Parameter |
Value Range |
Notes |
| Operating Temperature |
-40°C to +70°C |
Industrial-grade temperature tolerance |
| Mounting |
DIN rail (TS35/7.5 or TS35/15) |
Standard industrial mounting |
| Protection Rating |
IP20 (front panel) |
Protection against solid objects |
| Connection Type |
Screw terminals (M3) |
Secure wiring connection |
| Wire Cross-Section |
0.2-4 mm² (24-12 AWG) |
Flexible conductor compatibility |
2. EMUG Series Specific Parameters:
| Parameter |
Value |
Notes |
| Relay Type |
Miniature switching relays |
Solder-in type |
| Contact Material |
Gold (KSR-G variants) or AgNi (standard) |
Gold for low-current applications |
| Contact Rating |
Up to 6A (resistive load) |
Standard switching capacity |
| Insulation Voltage |
2,500V AC (1 min) |
High isolation between control and power circuits |
3. EMG Series Specific Parameters:
| Parameter |
Value |
Notes |
| Diode Type (DIO Series) |
1N4007 (7P/7M), 1N5408 (4P/4M/4E) |
1N4007: 1A, 1000V; 1N5408: 3A, 100V |
| Solid-State Relay Output |
Up to 240V AC/1A or 60V DC/1A |
Load capacity for OV series |
| LED Indication |
Available on most modules |
Status monitoring |
V. 3-Step Selection Guide
Step 1: Determine Application Type
- Multi-Channel Control: Choose EMUG series for 4-8 relays in a single module
- Signal Protection: Select EMG-DIO series for diode protection circuits
- Single Relay Applications: Use EMG-REL series for individual relay solutions
- Special Functions: Pick appropriate EMG variants for timing (RC), indication (LG), or solid-state switching (OV)
Step 2: Select Module Size & Configuration
- Space Constraints:
- 12mm width: EMG 12 series (compact)
- 22mm width: EMG 22/EMUG 22 series (standard)
- 45mm width: EMUG 45 series (8-relay models)
- Contact Type:
- 1N/O (1): Normally open contact
- 21: Changeover contact (1N/O + 1N/C)
Step 3: Choose Power & Protection Options
- Power Supply:
- 24V DC (most automation systems)
- 230V AC (mains-powered applications)
- Multiple voltage options available (5V, 12V, 24V, 48V, 60V, 110V, 230V)
- Protection Features:
- KSR-G: Gold contacts with surge protection (EMUG series)
- 1N5408 diodes: Enhanced surge protection (EMG-DIO series)
VI. Application Scenarios & Recommended Products
| Application |
Recommended Product |
Why? |
| PLC Output Expansion |
EMUG 45-8REL/KSR-G 24/1 |
8 relays in one module, space-efficient |
| Inductive Load Protection |
EMG 22-DIO 7P |
7 diodes for multiple loads, common cathode |
| Motor Control Circuit |
EMG 22-DIO 4P-1N5408 |
Heavy-duty diode protection |
| DC to AC Load Switching |
EMG 12-OV-24DC/240AC/1 |
Solid-state relay eliminates contact wear |
| Compact Control Panel |
EMG 12-REL/KSR-24/1 |
Single relay, minimal space requirement |
| Custom Signal Conditioning |
EMG 12-RC/10UF/100K |
RC circuit for pulse shaping |
VII. Important Considerations
- Current Ratings: Ensure the module's contact or diode current rating exceeds the load current
- Voltage Compatibility: Verify input/output voltage matches your system requirements
- Surge Protection: Use KSR-G or 1N5408 variants in inductive load applications to prevent voltage spikes
- Module Width: Plan DIN rail space accordingly (12mm/22mm/45mm per module)
- Contact Material: Gold contacts (KSR-G) recommended for low-current, high-reliability applications
VIII. Conclusion
The Phoenix Contact EMUG/EMG series provides comprehensive relay and interface solutions for industrial automation. EMUG excels in multi-channel relay control, while EMG offers versatile signal conditioning options.
