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- ABB
- CMRB-11C
- Main Control Circuit Board
- Sweden
- 115 × 50 × 120 mm
- 0.74kg
- 3AUA0000054682
- Xiamen, China
- New & In Stock
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All our products are priced very favorably because we have our own warehouse and supply.
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Product Technical Profile – ABB CMRB‑11C (3AUA0000054682)
1) Brand and Series Overview
Brand: ABB
Series: CMRB (Control Monitoring Relay Bus) Interface Modules
The CMRB series consists of industrial relay and interface modules designed for robust monitoring, discrete signal acquisition, and relay control within automation systems. These modules provide galvanic isolation, relay outputs, and versatile I/O configurations for industrial machinery, process control, and safety applications.
The CMRB‑11C is a compact relay and interface module optimized for discrete input acquisition and relay-driven output control, making it suitable for industrial panels, automation cabinets, and safety interlock systems.
2) Product Overview
The ABB CMRB‑11C (3AUA0000054682) functions as a discrete interface and relay module for industrial control systems. It collects digital signals from field devices like switches, sensors, and safety interlocks, processes them, and outputs control signals through relays to PLCs or actuators.
Its design ensures electrical isolation between input and output circuits, which protects control systems from spikes and noise. The module mounts easily on standard DIN rails, occupies minimal panel space, and operates reliably in harsh industrial environments.
This module is particularly useful where safe, noise‑immune relay outputs are needed alongside discrete digital input processing.
3) Technical Parameters
| Parameter | Specification |
|---|---|
| Model | CMRB‑11C (3AUA0000054682) |
| Product Type | Relay Interface Module |
| Series | CMRB Industrial Interface Modules |
| Input Channels | 8 Digital Inputs |
| Output Channels | 4 Relay Outputs (Form C) |
| Input Voltage | 24 V DC |
| Output Rating | 5 A / 250 V AC max per relay |
| Isolation | Galvanic isolation between I/O circuits |
| Mounting | DIN Rail (35 mm) |
| Protection Rating | IP20 |
| Operating Temperature | −20 °C to +60 °C |
| Storage Temperature | −40 °C to +85 °C |
| Relative Humidity | 5–95 % non‑condensing |
| Terminal Type | Screw Terminals |
| Dimensions (H × W × D) | 115 × 50 × 120 mm |
| Weight (kg) | 0.74 kg |
| Housing Material | Flame‑retardant industrial polymer |
4) Product Description
The CMRB‑11C is a compact interface and relay module intended for industrial automation and control panels. It:
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Acquires multiple discrete input signals from sensors, pushbuttons, limit switches, and safety contacts.
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Provides relay outputs capable of switching control devices, alarms, or actuators.
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Includes galvanic isolation to safeguard sensitive PLCs and control electronics from transients or electrical noise.
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Mounts easily on DIN rails, enabling neat integration into control cabinets.
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Supports wide operating conditions, making it suitable for industrial production, processing plants, and safety-critical systems.
Its robust design ensures reliable operation in environments with electrical interference and varying temperatures.
5) Key Advantages
• Robust Signal Conditioning – Ensures clean input data for PLCs and controllers.
• Galvanic Isolation – Protects control electronics from spikes, surges, and ground loops.
• Flexible Relay Outputs – Supports alarms, actuators, or interlock devices.
• Compact DIN Rail Mounting – Saves space in control panels.
• Industrial Durability – Wide operating temperature and high humidity tolerance.
• Modular Integration – Compatible with PLCs and safety automation systems.
• Low Maintenance – Reliable operation reduces service requirements.
• Clear Wiring Terminals – Simplifies installation and field servicing.
6) Typical Applications
• Discrete input acquisition for PLCs
• Safety interlock and emergency stop signal processing
• Machine status monitoring and alarm signaling
• Conveyor system automation and material handling control
• Relay-driven actuator control
• Industrial cabinet I/O distribution
• Automated assembly line logic control
• Distributed field interface modules
7) Five Related Models (CMRB Series or Related Modules)
| Model | Primary Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| CMRB‑10A | Basic relay interface | 110 × 45 × 115 | 0.70 |
| CMRB‑12C | Enhanced digital + relay module | 115 × 55 × 120 | 0.80 |
| CMRB‑15C | Safety interface with alarms | 115 × 55 × 120 | 0.82 |
| CMRB‑11B | Previous-generation relay interface | 115 × 50 × 120 | 0.73 |
| CMRB‑20C | Dual I/O interface module | 120 × 60 × 125 | 0.85 |
8) Five Popular ABB Models (Same Brand Industrial Portfolio)
| Model | Product Type | Primary Feature / Rating | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| ACS580‑01‑07A6‑4 | Variable Frequency Drive | 7.5 kW | 358 × 152 × 203 | 5.8 |
| ACS880‑01‑033A‑4 | High-Performance Drive | 33 kW | 400 × 220 × 210 | 8.5 |
| Emax 2 E2.2 | Air Circuit Breaker | 1600 A | 371 × 210 × 268 | 8.2 |
| Tmax XT3N | Molded Case Circuit Breaker | 250 A | 140 × 105 × 160 | 2.1 |
| AF16‑30‑10 | Control Contactor | 16 A | 90 × 55 × 78 | 0.42 |
9) Frequently Asked Questions (FAQ)
Q1: What is the purpose of the CMRB‑11C?
A1: It interfaces discrete input signals and provides relay outputs for industrial automation systems.
Q2: How many digital inputs are supported?
A2: The module has 8 digital inputs.
Q3: What type of outputs does it provide?
A3: Four relay outputs capable of switching 5 A at 250 V AC.
Q4: What voltage is required for operation?
A4: 24 V DC.
Q5: How is the module mounted?
A5: On a standard 35 mm DIN rail.
Q6: Does the module provide isolation?
A6: Yes, it features galvanic isolation between inputs and outputs.
Q7: Can it be connected to a PLC?
A7: Yes, it integrates with PLCs and automation controllers.
Q8: What applications are typical?
A8: Discrete input acquisition, alarm control, safety interlocks, and relay-driven device control.
Q9: What are its dimensions and weight?
A9: 115 × 50 × 120 mm and 0.74 kg.
Q10: What is the main advantage of using CMRB‑11C?
A10: Provides reliable, noise-immune relay and digital interface in industrial automation systems.