Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | RLM01 |
| Manufacturer | ABB |
| Product Category | Electromechanical Auxiliary Relay |
| Contact Configuration | 4 NO (Normally Open) |
| Contact Rating | 8 A @ 250V AC / 10 A @ 30V DC |
| Coil Voltage Range | 24-230V AC/DC (auto-sensing) |
| Operate Time | ≤ 15 ms |
| Isolation Voltage | 4 kV AC (contact-to-coil) |
| Mechanical Durability | 10 million operations |
| Electrical Durability | 100,000 operations @ rated load |
| Mounting | DIN rail (35 mm) or panel screw |
| Operating Temperature | -25°C to +55°C |
| Safety Certifications | IEC 60255, UL 508, CE |
ABB RLM01
Product Introduction
The ABB RLM01 is a high-performance auxiliary relay designed for signal amplification and electrical isolation in industrial control circuits. As a critical component of ABB’s Relion® protection and control portfolio, this versatile module bridges low-power control signals from PLCs or protection relays with high-current actuator circuits. The RLM01 converts delicate electronic commands into robust switching power, enabling reliable operation of contactors, alarms, and indicator systems across diverse automation environments.
Engineered for harsh industrial applications, the ABB RLM01 features bifurcated silver-nickel contacts with arc suppression chambers, ensuring consistent performance in inductive load switching. Its universal coil voltage design eliminates the need for multiple stock variants, simplifying maintenance in complex facilities. The transparent cover provides instant visual status confirmation, making the RLM01 indispensable in ABB System 800xA, Compact 800, and multi-vendor control architectures requiring fail-safe signal interfacing.
Core Advantages and Technical Highlights
Contact Reliability:
Featuring twin-break contact technology with arc chutes, the ABB RLM01 achieves 3× longer electrical life than standard relays. Gold-plated contact surfaces maintain resistance below 50mΩ even after 100,000 operations at full load.
Universal Voltage Operation:
Auto-sensing coil circuitry accepts 24-230V AC/DC without configuration changes. Integrated flyback diode protects control circuits from voltage spikes up to 1.5kV during de-energization.
Maintenance-Friendly Design:
Front-accessible test button allows functional verification without disconnection. Mechanical flag indicator remains visible during power loss for failure analysis. The compact 17.5mm width enables high-density panel installations.
Environmental Robustness:
Operates reliably in corrosive atmospheres with conformal-coated PCBs and stainless steel springs. Vibration resistance to 3g (15-150Hz) ensures stability in mobile equipment and vibrating machinery.
Typical Application Scenarios
In electrical substations, the ABB RLM01 isolates REF615 protection relay outputs from circuit breaker trip coils, preventing ground potential rise (GPR) damage during fault conditions. Its 4kV isolation barrier safeguards sensitive electronics while handling 8A inductive loads.
Manufacturing safety systems utilize RLM01 relays to convert safety PLC signals (24V DC) into 480V AC motor contactor control. The ≤15ms response time meets ISO 13849 stop category 0 requirements for emergency shutdowns. For water treatment plants, multiple RLM01 units create distributed I/O nodes along filter banks, reducing control wiring by 60% while withstanding 95% humidity environments.
Related Model Recommendations
REF615 Protection Relay: Primary control source for RLM01
CM-ENS.13S Voltage Monitor: Coil power supervision
SA1A Contact Block: Adds 1NO+1NC contacts to RLM01
TA25-22.0 DIN Rail Adapter: Secure mounting solution
CP-S 24V/2.5 Power Supply: Recommended control voltage source
SDV-R 40 Surge Protector: Complementary transient suppression
ABB RLM01
Installation, Commissioning and Maintenance Instructions
Installation Preparation:
Verify DIN rail thickness ≥0.8mm. Maintain ≥10mm clearance above module for heat dissipation. Separate control (0.5-1.5mm²) and power cables (1.5-4mm²) in dedicated trays. Apply 600V-rated isolation between circuits.
Maintenance Recommendations:
Measure contact resistance annually (<50mΩ). Exercise contacts quarterly using test button under no-load conditions. Replace after 100,000 operations or 5 years continuous service. Clean dust with dry compressed air (<1 bar). Always de-energize before module removal.
Service and Guarantee Commitment
ABB provides a 36-month warranty for the RLM01, covering contact wear beyond rated electrical life. Global technical support includes relay testing protocols and failure analysis. Product lifecycle commitment ensures 15-year spare availability post-discontinuation, with migration kits for legacy systems.
All relays undergo 100% production validation:
5,000 mechanical operation cycles
2.5kV impulse withstand testing
Contact resistance verification
Dielectric strength testing
Extended warranty options include performance audits and surge protection compatibility certification.
