Phoenix Contact ELR1-24DC-600AC-30 relay

Phoenix Contact ELR1-24DC-600AC-30, Order No. 2297154

1. Complete Model Decoding

Model: ELR1-24DC-600AC-30

1. ELR1: Series → ELR1 single-phase
2. 1 single-phase electronic load relay
3. (solid-state contactor, contactless switch, suitable for motor loads)
4. 24DC: Control side supply / drive voltage: 24 V DC
5. 600AC: Rated operating voltage of main circuit: AC 0…600 V
6. 30: Rated continuous operating current: 30 A
7. 2297154: Official unique Phoenix Contact order number

Full Product Name: ELR 1-24DC/600AC-30 Solid-State Contactor

2. Core Electrical Parameters

3. Key Features

✅ No mechanical contacts, no electric arcs, low noise, extended service life, ideal for frequent start-stop operation

✅ Built-in overvoltage absorption circuit to suppress inductive load surge

⚠️ Important Restriction: Single-phase solid-state relay. Not for direct control of three-phase loads; only applicable to single-phase AC loads

⚠️ For inductive loads (motors, coils), sufficient current margin is required; 30% current derating is recommended

4. Pin / Terminal Definition

A1 / A2: Control terminals for 24 V DC

A1(+), A2(-)

L / N: AC input terminals of main circuit

OUT: Load output terminal

5. Typical Application Scenarios

Control of electric heaters inside industrial control cabinets

Frequent start-stop of single-phase fans and conveyor motors

Temperature control loops for packaging machinery, test equipment and ovens

AC loads requiring low-noise, maintenance-free switching

6. Alternative & Same-Series References
7. Lower-current variants in the same series: ELR1-24DC-600AC-10 (10 A), ELR1-24DC-600AC-20 (20 A)
8. For three-phase solid-state switches: Refer to ELR3 series (three-phase solid-state contactors)
9. Competitor equivalents: Schneider SSP series, Omron G3PA single-phase solid-state relays
10. Procurement Notes

Distinguish model suffixes: Do not confuse ELR1 (single-phase) / ELR3 (three-phase)

Use order number 2297154 strictly to avoid delivery of other current ratings

Solid-state components generate significant heat; sufficient clearance for heat dissipation is required for dense installation inside cabinets

Application Scenarios — Phoenix Contact ELR 1-24DC/600AC-30 (Order No.2297154)

Product Overview Recap

Single-phase solid-state contactor (contactless SSR)

Control: 24 V DC; Main circuit: ≤600 V AC, rated 30 A; DIN rail mounted; optoelectronic isolation; bidirectional triac output; optimized for frequent switching of single-phase AC loads

Core Advantages: Arc-free, no mechanical wear, low noise, high-speed frequent switching. Limitation: Self-heating, current derating mandatory for inductive loads.

Critical Premise: Only supports single-phase AC loads; cannot directly drive three-phase motors

1. General Standard Industrial Scenarios

1.1 Resistive Heating Loads (Most Common Application)

1. Control of heating tubes in ovens, tunnel furnaces and thermal processing equipment
2. Heating circuits for injection molding and extruder barrels
3. Industrial thermostats, hot air blowers and duct electric heaters
4. Heating elements of heat-sealing machines and hot stamping equipment in packaging machines

✅ Advantage: PID high-frequency continuous switching by temperature controllers rapidly wears contacts of mechanical contactors; ELR1 perfectly fits this working condition

1.2 Single-Phase Fans & Pumps (Inductive Loads)

Application requirement: 25%~30% current derating for load selection

1. Control cabinet cooling fans, industrial exhaust fans and ducted single-phase fans
2. Small single-phase centrifugal pumps, circulating water pumps and fume exhaust fans
3. Air supply units for drying equipment

⚠️ Note: Large inrush current upon motor startup; recommended actual load ≤20~22 A for the 30 A model

1.3 Lighting Loads

1. High-power halogen lamp banks and infrared heating lamp arrays in workshops
2. High-power lighting arrays in test laboratories

❌ Not recommended: LED drivers and electronic ballast loads (high inrush current; RC snubber circuit is recommended)

2. Industry-Specific Field Applications

▶ Packaging Machinery

1. Heating control for heat shrink tunnels
2. Actuation of heat-seal bars on vertical / horizontal packaging machines
3. Single-phase drive motors on conveying lines and hot air drying systems

▶ Plastics & Rubber Machinery

1. Heating rod control for each temperature zone of extruders and pelletizers
2. Start-stop control of heating circuits for mold temperature controllers

▶ HVAC & Environmental Test Equipment

1. Heaters for high-low temperature test chambers and constant temperature & humidity chambers
2. Hot air circulation systems for purification equipment
3. Heating modules of industrial dehumidifiers

▶ New Energy & Lithium Battery Production Lines

1. Heating control for electrode drying ovens
2. Hot air devices for dust removal equipment

Advantage: No sparks for dust-free workshops (the device itself is NOT explosion-proof; explosion-proof enclosure is mandatory for hazardous areas)

▶ Food & Pharmaceutical Equipment

1. Electric heating systems for food baking lines and sterilization equipment
2. Hot air drying units for cleaning equipment

Advantage: Contactless operation prevents metallic dust generation, meeting operation requirements for cleanrooms

▶ Automated Test Equipment

1. Switching of high-power loads on aging test benches
2. Adjustable AC load switching devices in laboratories
3. Cluster control of high-power AC solenoid coils
4. Inapplicable Scenarios (Selection Red Lines)
5. ❌ Direct control of three-phase asynchronous motors (ELR1 is single-phase SSR; only controls one phase. Strictly prohibited as main three-phase switch. Select ELR3 series for three-phase loads)
6. ❌ Frequent startup of high-power single-phase compressors (severe startup inrush current may cause triac breakdown)
7. ❌ Applications relying on the device for long-term overload & short-circuit protection (solid-state relays have poor short-circuit withstand capability; circuit breakers / fuses must be installed upstream)
8. ❌ Unprotected outdoor open-air installation (must be fitted inside control cabinets)
9. ❌ High-frequency high-voltage inductive loads without RC snubber circuits
10. Recommended Supporting Configuration for On-Site Deployment
11. Inductive loads (motors, coils): Parallel Phoenix Contact RC absorption modules to suppress back EMF
12. Multiple units mounted side-by-side on DIN rail: Maintain minimum clearance ≥10 mm between adjacent devices; current derating required when cabinet ambient temperature＞45 ℃
13. Upstream protection: Deploy gG fuses; circuit breakers alone cannot provide reliable short-circuit protection
14. Preferred component for PID temperature control systems; switching frequency can reach several cycles per second, service life far exceeding mechanical contactors

Mounting Specification — Phoenix Contact ELR 1-24DC/600AC-30 (2297154)

1. Standard Mounting Form

Standard mounting: Snap-on installation on 35 mm DIN rail (TH35-7.5)

1. Integrated DIN rail locking clip on device rear side; no additional brackets required
2. Mandatory mounting orientation: Vertical installation (terminals facing up/down; cooling fins arranged vertically)

❌ Horizontal side mounting & inverted installation are forbidden! Horizontal placement blocks natural convection cooling, leading to overheating shutdown and triac damage.

2. Mounting & Dismantling Procedures
3. Hook the upper clip onto the DIN rail;
4. Press down the main body until an audible “click” confirms the lower clip locks onto the rail;
5. Removal: Pry open the bottom clip with a flat screwdriver and lift the device upwards.
6. Thermal Clearance Requirements (Critical! 30 A solid-state contactors generate considerable heat)

Single Independent Installation

Vertical clearance (top & bottom): ≥50 mm ventilation space

Lateral clearance: ≥10 mm if adjacent space is vacant

Multiple Units Mounted Side-by-Side on the Same DIN Rail

Minimum clearance between adjacent devices: ≥10 mm

Zero-clearance tight arrangement is prohibited

Maintain ≥15 mm clearance if cabinet temperature＞40 ℃

For large-scale continuous installation, forced air cooling via cabinet axial fans is recommended

4. Wiring Specification (Screw Terminals)

Terminal Assignment

A1(+), A2(-): 24 V DC control circuit

L, OUT: Main circuit for single-phase AC loads

Wiring Parameters

1. Terminal type: Anti-loosening screw terminals
2. Applicable conductors:

Solid single-core wire: 0.5～10 mm²

Stranded flexible wire: Crimp lugs are recommended

3. Recommended tightening torque: 1.2～1.5 N·m

⚠️ Insufficient torque → excessive heating; excessive torque → thread slipping or terminal base cracking.

Wiring Layout Suggestion

Separate routing for control cables (A1/A2) and high-power cables (L/OUT) to reduce electromagnetic interference

Minimize length of power wiring to reduce voltage drop and heat generation

5. Ambient Operating Boundary Conditions
6. Installation location: Inside control cabinets, IP20 protection class

❌ Direct exposure to open air; avoid dust, moisture and condensation contacting the device

2. Permissible operating temperature: -20 ℃ ～ +60 ℃

Current derating is mandatory when ambient temperature＞40 ℃

3. Avoid these installation positions:

Directly above transformers, power resistors and other heat-generating components

Poorly ventilated dead zones inside cabinets

Locations with persistent strong vibration (continuous vibration loosens terminal screws)

6. Optional Heat Dissipation Accessories

For continuous full-load operation in enclosed cabinets, DIN rail-mounted aluminum heat sinks can be attached to the rear of the device to reduce housing temperature.

No heat sink supplied as standard; cooling relies on integrated housing fins for natural convection.

7. Strictly Prohibited Operations
8. Do not suspend the device by cables; all mechanical load shall be supported by the DIN rail
9. Do not block cooling fins on sides and rear surface
10. Do not connect multiple ELR1 units in parallel for current sharing (inconsistent on-resistance causes uneven current distribution and burnout)
11. Do not install contactors / circuit breakers tightly adjacent to solid-state contactors without heat clearance

Standard Description for Engineering Drawings

The ELR1-24DC/600AC-30 shall be vertically mounted on TH35 standard DIN rail. Lateral clearance between adjacent devices ≥10 mm. Separate routing for control and power circuits. Terminal tightening torque: 1.2~1.5 N·m. Ensure adequate natural ventilation for heat dissipation.