Perseus Energy 285
€949.00
The DIN-rail solution for energy monitoring with LTE backup and M-Bus Master
The HW group Perseus Energy 285 is a DIN-rail solution with LAN and LTE for remote monitoring and control in the field of energy monitoring, equipped with an M-Bus Master. It connects external physical sensors (°C, %RH, A, V, …), detectors (relay/dry contact) or a WLD sensor cable (water leak detection). Third-party meters can additionally be connected via LAN or Modbus/RTU – the integrated LTE backup connection ensures that the device remains operational even in the event of an Ethernet failure.
The Perseus Energy 285 combines data from external physical sensors, detectors and meters with data from other HWg devices connected via the network. Local conditions, Lua scripting, a calendar or a periodic scheduler help evaluate the measured data – with a capacity of up to 100 sensors with 1,000 values (variables).
Sensors, M-Bus meters, LTE backup and other network devices in one system
In a DIN-rail housing, the Perseus Energy 285 combines six 1W-UNI ports (RJ11), four S0 pulse inputs (DI) according to EN 62053-31 Class A, RS-485 (Modbus/RTU), a WLD zone connection as well as an M-Bus Master input and two relay outputs (DO).
Integrated LTE modem
Globally usable LTE modem for backup connectivity to the portal as well as SMS and call alarms, also usable as an SMS gateway for other HWg devices. SIM card not included.
6x RJ11 (1-Wire UNI)
Up to two HW group 1-Wire UNI sensors per port, e.g. for temperature, humidity, voltage or current.
M-Bus Master
One terminal block for the direct connection of M-Bus-compatible meters, such as electricity, gas or water meters.
RS-485 (Modbus/RTU)
4-pin terminal block with 12V for connecting Modbus/RTU-capable third-party sensors and meters.
WLD water leak detection
1 zone for an external water sensor cable with a total length of up to 185 m.
4x DI (S0) / 2x DO
Four S0 pulse inputs for energy meters according to EN 62053-31 Class A and two relay outputs (250V/10A) for controlling e.g. ventilation or doors.
Individually selectable: base unit or starter set
The Perseus Energy 285 is available either as a pure base unit or as a complete starter set with LTE antenna. The desired option must be selected in the shopping cart.
Please note: The base unit "Perseus Energy 285" includes neither a power adapter nor a GSM antenna. The "Perseus Energy 285 set" variant additionally includes an LTE SMA Quadband antenna – also without a power adapter. The option must be selected in the shopping cart.
Perseus Energy 285
Perseus 285 unit. Energy metering: DIN-rail housing, 4 DI (S0 counters), 2 DO (relays 230V), 6x RJ11 (8x60 m, 1 port = 1 sensor), RS485 Modbus-RTU, 1x M-Bus Master, meters API. Power adapter or GSM antenna are not included.
Perseus Energy 285 set
Perseus 285 energy starter set. Includes: Perseus Energy 285 as above plus an LTE SMA Quadband antenna.
How the Perseus Energy 285 is designed
The plastic housing is designed as a DIN-rail device measuring approximately 65 x 90 x 213 mm, with IP40 protection rating and designed for operating temperatures from -30°C to 65°C.
Plastic housing for DIN rail
Compact plastic housing for direct mounting on a DIN rail in a control cabinet – suitable for IT, SoHo and industrial environments.
Ethernet connection with web server
One RJ45 Ethernet port (100BASE-T) connects the device to the network; an integrated web server enables configuration directly via the browser.
LTE modem with SIM slot and external SMA antenna
Internal, globally usable LTE modem with SIM card slot and connector for an external SMA antenna. Serves as a backup channel to the portal if the LAN fails, as well as for SMS and call alarms; SIM card and antenna are not included with the base unit.
Sensor and meter connections
Six RJ11 ports for 1-Wire/1-Wire UNI sensors, one RS-485 terminal block (including 12V) for Modbus/RTU and a separate M-Bus Master terminal block for M-Bus meters.
WLD, DI and DO terminals
One WLD zone connection for the water leak sensor cable (A/B), four S0 pulse inputs (EN 62053-31, Class A) for energy meters and two relay outputs (250V/10A) for controlling external actuators.
Power supply (230V)
The Perseus Energy 285 is supplied exclusively via a terminal block with 230V AC (power consumption approx. 130 mA).
Status indicators
LEDs on the front of the device indicate, among other things, status, alarm and WLD condition.
Evaluate sensor data from other LAN devices as well
The Meters API is a unique feature of all Perseus products: the device additionally reads sensor values from external LAN devices and includes them in analyses and alarms.
- Readable protocols: HWg XML, Modbus/TCP, SNMP, MQTT
- Examples of supported third-party devices: STE2 LITE, Poseidon2 4002, Damocles2 1208, NETIO PowerPDU 8QS, SNMP-capable UPS systems
- Combination of RS-485, M-Bus Master and Modbus RTU Meters API allows reading of third-party meters, UPS or climate devices
- Comparison of multiple sources possible, e.g. own 1-Wire temperature sensor vs. external thermometer vs. UPS temperature sensor
In addition, the Perseus Energy 285 supports integration into building automation systems via BACnet/TCP as well as IPv6 for modern, future-proof network environments.
Multi-level notification of critical events – even in the event of a LAN failure
The Perseus Energy 285 offers local, network-based and LTE-supported alarm options.
Local alarms
Switching of the relay outputs (DO) based on sensor data, e.g. to activate ventilation, air conditioning or automatic doors.
Standalone device alarms
SNMP trap, e-mail as well as SMS/calls via the integrated LTE modem – independent of the LAN connection.
Portal alarms (SensDesk)
Additionally e-mail, SMS, voice calls, device failure alert (Device Invalid Alert), alarm escalation and PDF reports – the portal connection remains active thanks to LTE backup even in the event of an Ethernet failure.
Advanced conditions
Alarms can be configured, for example, so that they only trigger when 2 out of 5 sensors exceed a threshold or are unreachable.
Lua scripting, conditions and schedules
For individual evaluation logic, the Perseus Energy 285 includes several tools.
- Local, user-defined scripts in Lua
- Variables with multiple conditions and actions
- Calendar- or period-based scheduler
- Template repository for third-party sensors
- Virtual sensors as well as unit conversion and calibration offset
- Integrated logger with 32 MB memory
Secure authentication and encryption
- Radius authentication according to IEEE 802.1X
- HTTPS with customer certificate
- Admin and user accounts with separate access rights
- IPv6 support as well as SNMP v1 and v3 (including SNMP traps)
From free cloud access to your own portal instance
The Perseus Energy 285 can optionally be connected to the SensDesk portal and thus expanded with central evaluation and management functions – the connection remains active thanks to LTE backup even in the event of a LAN failure.
HWg-cloud.com
Free portal service with e-mail alarms, device failure alert and a value graph with short history.
SensDesk.com / Portal Provider
Paid portals with e-mail, SMS and voice call alarms, virtual sensors, multi-graphs over several years, PDF reports and multi-user accounts.
Portal On-Premise
Standalone SensDesk installation on your own server for companies with special data protection requirements.
HWg Monitor App
Mobile app for iOS and Android, displays all sensor values at a glance – also usable as a wall display in the technical room.
Commissioning in a few steps
Setting up the Perseus Energy 285 is done entirely via the web browser.
- Mount the device on the DIN rail in the control cabinet
- Connect the 230V power supply
- Connect the device to the network via Ethernet cable
- Optional: Insert a SIM card and screw the LTE antenna onto the SMA connector (antenna included with the set variant, SIM card not included with either variant)
- Open the device’s IP address in the browser (initial search possible e.g. with HWg-Config)
- Connect 1-Wire UNI sensors to the RJ11 ports, Modbus/RTU devices to the RS-485 terminal block or M-Bus meters to the M-Bus Master
- Optional: Wire the WLD sensor cable, S0 pulse inputs and relay outputs
- Optional: Configure alarm rules, Lua scripts or the connection to SensDesk/HWg-cloud.com
Why the Perseus Energy 285 is the right choice
LTE backup
Remains reachable and capable of alarming even if the LAN connection fails.
M-Bus Master
Direct connection of M-Bus-compatible electricity, gas and water meters.
Versatile sensors
6x RJ11, RS-485, M-Bus, WLD, DI/DO in one device.
Meters API
Additional evaluation of sensor data from other LAN devices.
DIN-rail mounting
Compact housing for direct installation in the control cabinet.
24 months warranty
According to the manufacturer with 24 months warranty from the date of purchase.
Practical application examples
- Data concentrator for all local sensors and meters at a site
- Remote monitoring of technical rooms
- Monitoring of boiler room systems
- Monitoring of industrial machines
- Greenhouse, food storage and pharmaceutical storage monitoring
- Remote monitoring of infrastructure
- Gateway for third-party sensors to the portal
Practical example: In a boiler room, temperature sensors are connected via the RJ11 ports, a Modbus/RTU electricity meter via RS-485 and a gas meter via the M-Bus Master to the Perseus Energy 285. In addition, the device reads the battery status of an SNMP-capable UPS via the Meters API. An alarm is triggered as soon as two out of three sensors exceed a threshold; thanks to the internal LTE modem, the SMS or call notification is reliably sent even in the event of a LAN connection failure.
Frequently asked questions
What is the HW group Perseus Energy 285 and what is it used for?
The Perseus Energy 285 is a DIN-rail solution with LAN and LTE backup connectivity and M-Bus Master for energy monitoring and control applications. It combines external sensors, detectors and meters with data from other LAN devices and is particularly suitable for boiler rooms, industrial plants, pharmaceutical storage and general infrastructure monitoring.
What is the difference between the base unit and the "set"?
The base unit "Perseus Energy 285" includes neither a power adapter nor a GSM antenna. The "Perseus Energy 285 set" variant additionally includes an LTE SMA Quadband antenna – a power adapter is not included with either variant. The option is selected in the shopping cart.
What is the integrated LTE modem used for?
The internal, globally usable LTE modem serves as backup connectivity to the SensDesk portal if the LAN connection fails, and enables direct SMS and call alarms. In addition, it can be configured as an SMS gateway for other HW group devices on the network. A SIM card is not included and must be obtained separately.
What is the M-Bus Master and what is it needed for?
The M-Bus Master is a dedicated terminal block on the Perseus Energy 285 that allows M-Bus-compatible meters such as electricity, gas or water meters to be connected and read directly – in addition to the RS-485 interface for Modbus/RTU devices.
What exactly is the Meters API?
The Meters API is a special feature of the Perseus product range: in addition to the sensors connected directly, the device can also read values from other devices on the same LAN, for example from other HWg devices, SNMP-capable UPS systems or network PDUs, and include this data in its own analyses and alarms.
How is the Perseus Energy 285 powered?
The device is supplied exclusively via a terminal block with 230V AC; a matching power adapter is not included with either variant and must be obtained separately.
What is the maximum length of the water leak sensor cable?
An external water sensor cable with a total length of up to 185 metres can be connected to the WLD zone connection.
What security features does the device offer?
The Perseus Energy 285 supports Radius authentication according to IEEE 802.1X, HTTPS with customer certificate, separate admin and user accounts as well as IPv6 and SNMP v1/v3 including SNMP traps.
Questions about the Perseus Energy 285?
Our support team in Germany will advise you free of charge on selection, sensors and configuration.
- Perseus Energy 285:
Power adapter or GSM antenna NOT included - Perseus Energy 285 set:
WITHOUT power adapter - INCLUDES LTE SMA Quadband antenna
Interfaces:
- 6× RJ11 ports – 1-Wire / 1-Wire UNI sensors
- 1× M-Bus master (terminal block)
- 1× RS-485 (Modbus/RTU) terminal block with 12V
- 1× WLD zone for external water leak detection cable
- 2× DO (relay outputs)
- 4× DI (digital inputs, dry contact)
- Ethernet RJ45 (100BASE-T)
- Integrated LTE modem
Technical Specifications:
- Power supply: 230V
- Operating temperature: -30°C to 65°C (-22°F to 149°F)
- Enclosure: Plastic housing, DIN rail
- Dimensions: 65 × 90 × 213 mm
- Warranty: 24 months
- SIM card not included
Communication:
- Open API: SNMP, XML, Modbus/TCP, MQTT
- Alerts: SNMP Trap, Email, SMS/Calls
- Meters API: HWg XML, Modbus/TCP, MQTT, SNMP
- LTE global support
- Supports up to 100 external sensors
- Up to 1000 values manageable
- SMS gateway for Perseus and other HWg devices
Security:
- IPv6 support
- SNMP Traps, SNMPv3
- Radius – IEEE 802.1X
- Admin and user accounts
- HTTPS with client certificate
Functions:
- Local calendar-based scheduler
- Multiple conditions and actions per variable
- Local Lua scripts
- Unit conversion
- Template repository for third-party sensors
- Central security management 802.1X
- Backup connectivity to portal via LTE
Manufacturer information:
HW group s. r. o.
Rumunská 26
Prague, 120 00
Czech Republic
Phone: +420 222 511 918
Email: sales@hwg.cz
Responsible person:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
