Why Choose the ABB CM-TCN.012P Temperature Monitoring Relay with Modbus RTU?
The ABB CM-TCN.012P (1SVR760740R0120) is an advanced multifunctional temperature monitoring relay with integrated Modbus RTU communication, designed for accurate temperature supervision, equipment protection and industrial automation applications. As part of the ABB CM-TCN smart temperature monitoring relay series, it combines multiple temperature sensor inputs, configurable relay outputs and digital communication capabilities within a compact DIN rail-mounted device.
The CM-TCN.012P supports up to three independent temperature measuring circuits and is compatible with Pt100, Pt1000, PTC and NTC temperature sensors. With an overall temperature measuring range of −200 to +850 °C, depending on the selected sensor, it enables monitoring of electrical equipment, industrial machinery and process temperatures. Its configurable overtemperature, undertemperature and temperature range monitoring functions provide flexible protection for critical installations.
Operating from a 24–240 V AC/DC control supply, the CM-TCN.012P features three changeover relay outputs rated at 250 V / 4 A, an integrated Modbus RTU interface over RS-485, a backlit LCD display and NFC-based configuration through the ABB EPiC smartphone app. Its 45 mm-wide housing and maintenance-free push-in terminals simplify installation in industrial control panels and electrical distribution systems.
Key Advantages
- Advanced multifunctional temperature monitoring for industrial equipment protection.
- Three independent sensor circuits allow multiple temperatures to be monitored simultaneously.
- Compatible with Pt100, Pt1000, PTC and NTC sensors for flexible applications.
- Wide temperature measuring range of −200 to +850 °C, depending on sensor type.
- Integrated Modbus RTU communication enables remote monitoring and integration with automation systems.
- 24–240 V AC/DC universal control supply supports different industrial power systems.
- Three configurable changeover contacts provide flexible alarm and control outputs.
- Backlit LCD display provides local temperature readings and device information.
- NFC configuration using the ABB EPiC app simplifies parameter setting and commissioning.
- Configurable temperature thresholds, hysteresis and delays help prevent unnecessary alarms.
- Integrated sensor fault detection improves monitoring reliability.
- ABB Easy Connect Technology push-in terminals reduce wiring and installation effort.
Key Features
- ABB CM-TCN.012P smart temperature monitoring relay.
- 24–240 V AC/DC rated control supply voltage.
- Three temperature measuring channels.
- Pt100 and Pt1000 resistance temperature detector compatibility.
- PTC and NTC thermistor compatibility.
- −200 to +850 °C overall temperature measuring range.
- Configurable overtemperature, undertemperature and temperature range monitoring.
- Three changeover (SPDT) output contacts.
- 250 V / 4 A output contact rating.
- Integrated RS-485 Modbus RTU communication interface.
- Remote access to measured temperatures, relay status and device information.
- Backlit LCD display for temperature values, settings and maintenance information.
- Front-panel rotary push control for local configuration.
- NFC connectivity for smartphone-based parameterisation.
- Compatible with the ABB EPiC mobile application.
- Device configuration through NFC without applying external power.
- Configurable alarm thresholds, hysteresis and switching delays.
- Sensor fault monitoring for improved operational reliability.
- Event history and operating information for maintenance support.
- ABB Easy Connect Technology push-in terminals.
- 45 mm-wide DIN rail housing.
Technical Specifications
- Manufacturer: ABB
- Series: CM-TCN Smart Temperature Monitoring Relays
- Model: CM-TCN.012P
- ABB order code: 1SVR760740R0120
- Product type: Multifunctional temperature monitoring relay
- Rated control supply voltage: 24–240 V AC/DC
- Supply frequency: 50/60 Hz AC or DC
- Number of measuring circuits: 3
- Supported temperature sensors: Pt100, Pt1000, PTC and NTC
- Overall measuring range: −200 to +850 °C
- Monitoring functions: Overtemperature, undertemperature and temperature range monitoring
- Temperature thresholds: Configurable
- Hysteresis: Configurable
- Switching delays: Configurable
- Sensor fault monitoring: Supported
- Output contacts: 3 changeover (SPDT) contacts
- Contact rating: 250 V / 4 A
- Communication protocol: Modbus RTU
- Communication interface: RS-485
- NFC connectivity: Integrated
- Mobile configuration: ABB EPiC app
- Display: Backlit LCD
- Local configuration: LCD and rotary push control
- Maintenance information: Event history, operating data and device status
- Terminal type: Push-in, screwless terminals
- Connection technology: ABB Easy Connect Technology
- Mounting type: DIN rail mounting
- Housing protection rating: IP50
- Terminal protection rating: IP20
- Operating ambient temperature: −25 to +60 °C
- Power loss: 2 W
- Dimensions (H × W × D): 85.6 × 45 × 103.7 mm
- Net weight: 0.27 kg
- Mechanical endurance: 30,000,000 cycles
- Electrical endurance: 100,000 cycles (AC-12)
- Maximum operating altitude without derating: 2,000 m
- Pollution degree: 2
- EAN: 4013614552663
- Product category: Measuring and Monitoring Relays
Reliable Temperature Monitoring and Modbus RTU Integration for Industrial Equipment
Temperature monitoring relays such as the ABB CM-TCN.012P continuously evaluate signals from connected temperature sensors and compare measured values against configured operating limits. When temperatures exceed or fall below the selected thresholds, the relay can activate external alarms, switching devices or protection circuits. With three independent measuring channels, the CM-TCN.012P can monitor multiple locations within the same installation, such as motor windings, bearings, transformer components or electrical connections.
The integrated Modbus RTU interface enables measured temperatures, relay states, sensor status and maintenance information to be accessed remotely through compatible industrial communication systems. The relay can also be configured locally using its backlit LCD or through NFC using the ABB EPiC smartphone application. These capabilities support predictive maintenance, remote condition monitoring and integration with PLCs, supervisory control systems and industrial asset management platforms.
Typical Applications
- Industrial motor winding and bearing temperature monitoring.
- Power transformer temperature supervision.
- Electrical switchgear and distribution panel temperature monitoring.
- Busbar and electrical connection temperature supervision.
- Industrial pumps, compressors and rotating machinery.
- Manufacturing and process control equipment.
- Industrial heating and cooling systems.
- Temperature alarm and protection circuits.
- PLC and SCADA systems using Modbus RTU communication.
- Remote condition monitoring and predictive maintenance systems.
- OEM machinery and industrial automation control panels.
- Industrial electrical equipment requiring multiple temperature sensor inputs.
