Perseus Monitoring 155

Perseus Monitoring 155: Advanced 19-inch Rack Solution with LTE Backup

In a world where uninterrupted monitoring of critical infrastructure is essential, the Perseus Monitoring 155 sets new standards in data center monitoring. This 1U 19-inch rack device was specially developed for professional applications in data centers, audiovisual installations, and technical rooms.

With its ability to integrate up to 100 external sensors with 1000 variables, the Perseus Monitoring 155 offers comprehensive environmental monitoring. The combination of LAN connectivity and LTE backup ensures that the device remains operational even during Ethernet outages, while sensor integration and support for Modbus/RTU, SNMP Trap, and Lua scripting provide maximum flexibility.

Overview Perseus Monitoring 155

The Perseus Monitoring 155 is a highly advanced device designed to capture and analyze environmental data in real time. It supports a wide variety of sensors, including temperature, humidity, voltage, and current sensors, as well as detectors such as smoke detectors, door sensors, or water leak detection cables. With eight RJ11 ports for 1-Wire UNI sensors, an RS-485 port for Modbus/RTU sensors, 16 digital inputs (DI), four digital outputs (DO), and a WLD port for water leak detection, the device offers impressive flexibility. An integrated LTE modem ensures backup connectivity and enables SMS and call notifications even if the LAN connection is interrupted.

The unique Meters API allows the Perseus Monitoring 155 to read sensor data from other devices on the same network, such as the STE2 R2 thermometer or SNMP-enabled UPS systems, for analysis. Support for Lua scripting, calendar and scheduling functions, as well as an open API (SNMP, XML, Modbus/TCP, MQTT), make the device ideal for companies that want to integrate their monitoring systems into existing infrastructures. Connection with the SensDesk Portal extends functionality with advanced analysis and reporting options, while power supply via 9-30V, -48V, or PoE increases deployment options in various environments.

Main Features of the Perseus Monitoring 155

Connectivity and Sensor Support

• Ethernet port (RJ45, 100BASE-T): The Perseus Monitoring 155 features an integrated web server for easy configuration and monitoring via browser interface.
• LTE modem (Global): Provides backup connectivity and acts as an SMS gateway for the device itself and other HWg devices in the network.
• 8x RJ11 ports: Supports up to two 1-Wire UNI sensors per port for measurements such as temperature, humidity (indoor/outdoor), voltage, or current (0-30A or 4-20mA).
• RS-485 (Modbus/RTU): Enables integration of third-party sensors, such as power meters, UPS, or air conditioning units.
• WLD port: Supports a water leak detection cable with a total length of up to 185 meters.
• Digital inputs/outputs: 16 digital inputs (DI) for dry contacts (e.g., smoke detectors, door sensors) and four digital outputs (DO) for controlling relays, such as for air conditioning, ventilation, or automatic doors.
• Power supply: Flexible with 9-30V, -48V, or Power over Ethernet (PoE).

Data Processing and Analysis

The Perseus Monitoring 155 offers advanced data analysis through Lua scripting, allowing the creation of custom logic. Companies can define complex conditions to monitor specific events, such as triggering an alarm if two out of three temperature sensors exceed a critical value. Calendar and scheduling functions allow for time-controlled monitoring tasks, while virtual sensors enable calculation of averages or other aggregated data. This flexibility makes the device ideal for demanding applications in data centers and technical rooms.

Alarms and Notifications

The Perseus Monitoring 155 offers versatile alarm options that can be triggered both locally and over the network:

• Local alarms: Relay outputs (DO) can be switched based on sensor data, e.g., to activate fans or alarm sirens.
• Network-based alarms: SNMP Trap, email notifications, SMS, or calls (via the integrated LTE modem) immediately inform responsible personnel about critical events.
• Portal notifications: When connected to the SensDesk Portal, additional features such as device invalid alerts, PDF reports, and multi-year multigraphs are available.

Open API and Integration

The open API (SNMP, XML, Modbus/TCP, MQTT) allows seamless integration of collected data into existing SCADA or NMS systems. The Meters API is a unique feature that allows the Perseus Monitoring 155 to read sensor data from other devices on the LAN network. For example, the device can compare the temperature of its own 1-Wire UNI sensor with that of an external STE2 R2 thermometer or an SNMP-enabled UPS to trigger precise alarms. This data aggregation makes the Perseus Monitoring 155 ideal for complex monitoring scenarios.

Security Features

• Radius – IEEE 802.1X: Supports secure network authentication.
• HTTPS with client certificate: Ensures encrypted communication.
• Admin and user accounts: Allows access control for different user groups.
• IPv6 support and SNMP v3: For modern and secure network environments.

Connection with the SensDesk Portal

Integration with the SensDesk Portal significantly extends the functionality of the Perseus Monitoring 155. The portal offers:

• Graphs and multigraphs: Visualization of sensor data with historical trends.
• Virtual sensors: Calculation of averages or other aggregated data.
• Device invalid alerts: Notification in case of device connection loss, including via LTE.
• PDF reports: For audits and reporting in regulated industries.
• Multi-user accounts: For teams with different access rights.

The SensDesk Portal is available as both a SaaS solution and on-premise. For simple applications, the free HWg-cloud.com portal offers basic features such as email alerts and simple graphs. Thanks to the integrated LTE modem, the connection to the portal remains stable even if the LAN connection fails.

Typical Applications

• Data centers and server rooms: Monitoring temperature, humidity, and water ingress to protect expensive hardware.
• Telecommunication facilities: Monitoring base stations and technical rooms for reliable operation, even during network outages.
• Individual 19-inch racks: Precise monitoring of environmental conditions within a rack.
• Technical rooms: Monitoring power, voltage, or smoke detectors to ensure operational safety.
• Infrastructure monitoring: Integration of sensors for complex monitoring scenarios in large facilities.

A typical example is monitoring a data center. The Perseus Monitoring 155 can connect up to four temperature sensors (up to 60 meters 1-Wire UNI) directly to monitor temperatures in server racks. Additionally, the device can monitor the battery status of an external UPS via SNMP using the Meters API. An alarm can be configured to trigger if two out of five sensors exceed a threshold or are unavailable. Thanks to the LTE modem, SMS or call notifications can be sent even if the LAN connection fails.

Advantages of the Meters API

The Meters API is a unique feature of the Perseus product line. It enables the device to read sensor data from other devices on the same LAN network and use it for analysis or alarms. This is especially useful in complex environments where multiple devices provide data. For example, the Perseus Monitoring 155 can compare the temperature of its own sensor with that of an external STE2 R2 thermometer and include data from an SNMP-enabled UPS. This data aggregation enables more precise decisions and alarms based on multiple data sources.

LTE Backup and SMS Gateway

The integrated LTE modem is a key feature of the Perseus Monitoring 155. It ensures reliable backup connectivity if the Ethernet connection fails and enables direct SMS and call notifications. Additionally, the LTE modem can act as an SMS gateway for other HWg devices in the network, expanding alarm functionality. This is especially valuable for remote locations or environments with unstable network connections.

Mobile Monitoring with the HWg Monitor App

The HWg Monitor App (available for Android and iOS) offers a convenient way to monitor all sensor data at a glance. The app can connect directly to the Perseus Monitoring 155 or via the SensDesk Portal. It displays all sensor values on one screen and is ideal for mobile monitoring or as a wall display in technical rooms. With the app, responsible personnel can check the status of their monitored environments anytime and anywhere, even via the LTE connection.

The Perseus Monitoring 155 is a powerful and flexible solution for the remote monitoring needs of modern data centers and technical environments. With its ability to integrate a wide variety of sensors, analyze data from other devices, and provide versatile alarm options via LAN and LTE, this device is ideal for critical applications in data centers, telecommunications facilities, and more.

Support for Lua scripting, SNMP Trap, Modbus/RTU, and the unique Meters API make the Perseus Monitoring 155 an indispensable tool for companies that value reliability, flexibility, and security. Integration with the SensDesk Portal and LTE backup connectivity further extend functionality, allowing companies to benefit from advanced analysis and reporting options.

Technical Data at a Glance

• Ethernet: RJ45 (100BASE-T), integrated web server
• LTE: Global, integrated modem for backup connectivity and SMS gateway
• Sensor ports: 8x RJ11 (max. 2 1-Wire UNI sensors per port), 1x RS-485 (Modbus/RTU)
• Sensors: Temperature, humidity, voltage, current (0-30A or 4-20mA), and more
• WLD: 1 zone for water leak detection (up to 185m cable)
• Digital inputs/outputs: 16x DI (dry contacts), 4x DO (relays)
• Detectors: Smoke detectors, door sensors, fan failure, power presence, and more
• Alarm options: Email, SNMP Trap, SMS/calls (via LTE modem)
• API: SNMP, XML, Modbus/TCP, MQTT
• Security: Radius (IEEE 802.1X), HTTPS, admin/user accounts
• Data processing: Lua scripting, conditions & actions, scheduler
• Power supply: 9-30V, -48V, or PoE
• Portal: SensDesk (SaaS or on-premise), HWg-cloud.com
• Mobile App: HWg Monitor (Android/iOS)

Available Versions:

Perseus Monitoring 155

• Perseus 155 unit. Rack monitoring system: LTE backup, 16 DI, 4 DO (relays), 8x RJ11 (8x60m, 1 port = 1 sensor), 1x WLD zone, RS485 Modbus-RTU, Meters API. LAN with PoE or external 48V DC. Power supply, 19" mounting kit, SIM card, or GSM antenna NOT included.

Perseus Monitoring 155 Tset

• Perseus 155 temperature monitoring starter set. Includes: Perseus Monitoring 155 as above, universal power supply 12V 1.5A, Temp-1Wire 3m IP67, LTE antenna quadband pigtail. No SIM card included.