HW-group Perseus Energy 242

The HW-group Perseus Energy 242 is a compact, DIN-rail mounted monitoring solution designed for advanced energy and environmental supervision in critical infrastructures. Combining M-Bus, RS-485 Modbus/RTU, 1-Wire UNI sensor integration, and LAN connectivity, the device delivers maximum flexibility for IT, industry, telecom, and building automation.

Supporting up to 100 sensors and 1000 variables, the Perseus Energy 242 monitors energy and environmental parameters such as temperature, humidity, voltage, current, CO₂, and more. With open standards like SNMP, Modbus/TCP, MQTT, and XML, it integrates seamlessly into SCADA and IoT environments.

Key Features

• LAN connectivity with integrated webserver for fast setup
• 4 × RJ11 ports for up to 8 1-Wire UNI sensors
• RS-485 Modbus/RTU port for energy meters and process sensors
• M-Bus Master for direct integration of power, gas, or heat meters
• 2 DI inputs with S0 counter and 1 DO output for relays
• Datalogger with Lua scripting, scheduling, and virtual sensors
• Alarming via email, SNMP trap, or SMS/voice (with gateway)
• Secure communication: HTTPS, SNMPv3, Radius (802.1X), IPv6

Energy & Environmental Supervision

With M-Bus, RS-485, and 1-Wire support, the Perseus Energy 242 provides powerful monitoring options for energy flows and environmental values. M-Bus integration enables direct supervision of electricity, gas, and heat meters, while RS-485 supports industrial sensors. 1-Wire extends monitoring to temperature, humidity, voltage, or current.

IoT & SCADA Integration

Open protocols (SNMP, Modbus/TCP, MQTT, XML) ensure easy integration into SCADA, IoT platforms, and network management systems. Using the Meters API, data from LAN devices like UPS units or STE2 R2 can be aggregated for comprehensive energy and environmental insights. Cloud integration via HWg-cloud or SensDesk SaaS offers centralized dashboards, PDF reporting, alarm escalation, and multi-user support.

Data Logging & Analysis

An internal logger stores long-term data, which can be analyzed with HWg-PDMS and exported to Excel. Lua scripting, schedules, and virtual sensors allow for advanced processing, tailored analytics, and automated monitoring workflows.

Application Areas

• Data centers – energy supply and climate monitoring
• Industrial facilities – machine parameters and energy meters
• Telecom – reliable supervision of power and environments
• Building automation – smart building and energy efficiency
• Pharma & food – HACCP-compliant monitoring of temperature and energy

Remote & Mobile Access

With SensDesk or HWg-cloud, administrators manage devices centrally. The HWg Monitor app (iOS/Android) enables mobile access, with customizable widgets for real-time visibility of key metrics and alarms.

Variants

• Perseus Energy 242: Base device without PSU, for custom projects
• Perseus Energy 242 Set: Starter set with PSU for immediate deployment

Conclusion

The HW-group Perseus Energy 242 is a versatile DIN-rail energy and environmental monitoring gateway, combining M-Bus, Modbus, and 1-Wire integration with secure LAN-based connectivity. Scalable, cloud-ready, and IoT-integrated, it offers flexible deployment for IT infrastructures, industrial sites, and building management systems.