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IP thermostat with 230V/16A-rated relay outputsPoseidon2-3468

IP unit for remote monitoring, web thermostat, industrial-telco version. Supports external RJ11 sensors (voltage, current, illumination, humidity), 4x digital dry contact input and 2x 110/230V relay output. Supports e-mail alerts, SNMP, Modbus/TCP, XML, and the Sensdesk.com online portal.

Poseidon2 3468 is designed for telco or industrial applications.

The unit sends alerts or activates relay outputs.

Output relays can directly switch 110/230VAC.



Product Parameters

Product Parameters

  • Ethernet: RJ45 (10/100 BASE-T)
  • WEB: Built-in web server
  • Logging of values: Over 250,000 records (internal Flash
  • Sensors: 2xRJ11 – max. 8 external sensors (1-Wire / 1-Wire UNI)
Can measure: humidity, voltage, current, 4-20mA, illumination, temperature (incl. Pt100, Pt1000) and many other quantities...
  • Digital inputs (DI): 4x DI for dry contacts (state detectors)
  • Digital outpust (DO): 2x DO relay outputs (250V / 16A)
  • Power: 9–30VDC or –48VDC (Telco standard)
  • Mechanical: Fits on a DIN rail, 145 x 90 x 40 [mm]
  • Warranty: 2 years
  • M2M communication protocols: SNMP, XML, Modbus/TCP, HWg-Push
  • Text messages (SMS): Alerts can be sent as text messages (SMS) via a remote HWg-SMS-GW over the network. No software is needed.
  • Built-in local functions: Output control according to external sensor reading or a digital input ("thermostat" mode)
  • Support for programmers: HWg-SDK
  • Recommended online portal: SensDesk.com – free online portal

Supported software

  • HWg-Trigger: Control of other IP devices, alarm redirection to SMS
  • HWg-PDMS: Logging, export to MS Excel, reports
  • Third-party software (SCADA systems, Modbus/TCP)

Where to use

Where to use

  • Pharmaceuticals and food storage– temperature logging
  • Monitoring of storage conditions – warehouses, cooling plants, freezers, refrigerators.
Application software can create HACCP reports.

  • Remote thermostat / cabinet monitoring
  • Industrial applications
  • Monitoring at –48V telco nodes
  • Monitoring of power supply, back-up generators or UPS
  • Pharmaceuticals and food storage– temperature logging
  • Smart buildings

Usage example

Usage example

  • Remote thermostat / cabinet monitoring
  • Monitor doors, power supply status, temperature / humidity, dry contacts.

    Can be used for environment control or remote restart.

  • Industrial applications
  • Remote monitoring of dry contacts, 4-20mA probes or Pt100 / Pt1000 temperature probes.

    Values are logged to the internal memory.

  • Monitoring at –48V telco nodes
  • Poseidon2 3468 and its sensors can be powered by –48V DC.

    It is possible to power the unit from a protected DC part and monitor a problem-prone AC part.

  • Monitoring of power supply, back-up generators or UPS
  • Fuel level, diesel generator status, remote start over IP, monitoring of temperature and service interface (Dry contacts).

  • Pharmaceuticals and food storage– temperature logging
  • Monitoring of storage conditions – warehouses, cooling plants, freezers, refrigerators.

    Application software can create HACCP reports.

  • Smart buildings
  • Sensor readings can be shared in several applications.

  • Information booths (terminals), ATM's
  • IP surveillance systems
  • Remote gate control





IP thermostat and remote environment monitoring

app1 IP thermostat P2-3468 400

  • Temperature and humidity monitoring inside a cabinet.
  • Fits on a DIN rail.
  • Can be powered by –48V DC, provides 12VDC for powering sensors.
  • E-mail or SMS alert when a value is exceeded.
  • Relay activation (heating / cooling) according to sensor readings.
  • Connection to a NMS (SNMP monitoring) or SCADA (Modbus/TCP) system.
  • Door contact alerts to open doors.
  • Temperature and other values are logged to the internal memory.
  • Thermostat (hygrostat) can be configured over a web interface.

Extending the number of digital inputs, sensor daisy-chaining, relay outputs

app2 web-relay digital inputs P2-3468 400

  • Four dry contacts can be connected to Poseidon2 3468 digital inputs.
  • Number of dry contact inputs can be expanded with Expander 4xDI 1W-UNI. The expansion module connects to RJ11 as a sensor and counts as four sensors.
  • There is an internal logger for all sensors and Digital Inputs.
  • The device can be powered by -48V DC in Telco applications.
  • Sensors connected to RJ11 (1-Wire UNI) can be daisy-chained.
  • To connect the sensors, use the two RJ11 jacks on the sensors, or an external T-Box unit.

Connecting powered 4-20mA probes or Pt-100 / Pt-1000 temperature probes

app3 Pt100 ethernet 4-20mA P2-3468 400

  • A converter for two Pt-100 or Pt-1000 temperature probes can be connected to the Poseidon2 monitoring unit. The converter supports 2-wire, 3-wire and 4-wire connection of resistive temperature probes.
  • Industrial sensors with the 4–20mA interface can be connected to RJ11 using a converter. The external sensor is electrically isolated.
  • The external 4-20mA probe is powered from the measuring loop. The white converter box is powered from 12VDC (PowerOut output). The converter includes an electrically-isolated current supply for the external 4-20mA probe, providing up to 24V.
  • Converters for connecting external sensors can be calibrated using a curve with 8 points.
  • Other converters that can be connected to Poseidon2 3468 over RJ11: 0-60V DC, 0-30 AC, 0-20mA DC, 0-80A DC and more..
  • All values are stored into the internal flash memory logger.


Comparation of Poseidons

  Poseidon2 3266 Poseidon2 3268 Poseidon2 3468 Poseidon2 4002
Digital Inputs (DI) 4 DI 4 DI 4 DI 12 DI
Digital Outputs (DO)   2 DO (relay) 2 DO (relay 110/230V) 4 DO (relay)
1-Wire sensors 8 sensors 8 sensors 8 sensors 16 sensors
1-Wire UNI sensors ano ano ano ano
Industrial sensors - - - 24 sensors
Power 9-30V 9-30V 9-30V / -48V 9-30V
Logger capacity 250.000 records 250.000 records 250.000 records 250.000 records
HTML, XML, Flash setup ano ano ano ano
Modbus/TCP ano ano ano ano
SNMP, SNMP Traps ano ano ano ano
SMTP Email ano ano ano ano
Local SMS Alarms - - - ano
HWg-SMS-GW client ano ano ano ano
www.SensDesk.com ano ano ano ano
HWg-SDK for programmers ano ano ano ano

Contact us

Vrážská 1418
153 00, Prague 5
Czech republic


Phone: (+420) 723 069 809
Fax: (+420) 773 553 054
E-mail: sales@st-hw.com 



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