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I/O over Ethernet

Damocles 1208 is a device with 12 remote inputs and 8 outputs over Ethernet with Web interface.

M2M communication for connection to SNMP and SCADA systems. Pulse counters on digital inputs.

E-mail and SNMP trap notifications of input state changes. Box-2-Box mode - outputs can be controlled over the LAN by another device.

When an input dry contact state is changed (closed/open), Damocles sends an e-mail with customizable text and/or a SNMP Trap.

  • Pulse counter on every input (32 bits)
  • Box-2-Box mode: Outputs can be controlled over the IP network using sensors of another device
  • M2M protocols: SNMP, Modbus/TCP, XML (over HTTP)



Basic features

Basic features

  • Ethernet: RJ45 (10BASE-T)
  • WEB: Built-in web server
  • Inputs: 12 digital inputs (for dry contacts)
  • Outputs: 8 digital outputs (open collector, max. 24V)
  • Box-2-Box mode: Outputs are activated by alerts from other devices (Poseidon / Damocles)
  • Pulse Counter: 32. bit counter on each Digital Input (for connecting S0 pulses)
  • M2M communication protocols: SNMP, XML, Modbus/TCP
  • Reaction to changes at the input: SNMP trap, Email (editable text)
  • Mechanical: 140 x 90 x 40 [mm], wall-mountable, fits on a DIN rail
  • Support for programmers: HWg SDK

Supported software

  • HWg-PD Trigger: Controls other IP devices, redirects alarms to SMS
  • HWg-PDMS: Logging,conversion of pulses to energy, export to MS Excel, reports
  • CapTemp: Visualization on a map, control of outputs, alarm redirection to SMS
  • Third-party SNMP software

Usage example

Usage example


  • Remote equipment monitoring
  • Monitoring of A/C, UPS, security system status (status relays)

  • Energy consumption monitoring
  • Counting of pulses from electricity / water / gas meters. Conversion to price using HWg-PDMS in MS Excel.

  • Alarm alerts
  • Turning on a warning light or a horn upon alarm at another unit (over the network, Box-2-Box mode)

  • UPS and back-up generator monitoring
  • Fuel level, diesel generator status, remote start over IP

  • Security systems
    • IP surveillance systems (external sensors)
    • Equipment status, access control systems
  • SCADA: Connection of external inputs to multiple independent systems



Energy consumption metering and export to MS Excel

Digital inputs on the Damocles unit support pulse counting. Each DI (Digital Input) is equipped with a 32-bit pulse counter, minimum pulse width is 50 ms. Current count can be checked over the web interface. Damocles can transfer your monthly electricity consumption in kWh from your electricity meter to MS Excel.

  • Use an electricity meter with pulse outuput (e.g. 100 pulses/kWh per IEC 62053-1 (S0) standard)
  • Connect the pulses to Damocles DI
  • Connect the input to HWg-PDMS, set the coefficient (100 pulses/kWh) in detailed configuration
  • HWg-PDMS generates an overview of energy consumption over a given period, either automatically or on-demand
  • Set a price per kWh and charge your customers



Box-2-Box mode

Box-2-Box mode lets you use a Damocles unit as remote outputs. Outputs of the Damocles unit signal the OK or Alarm states of sensors and inputs at other devices. Any Poseidon, Damocles or HWg-WLD device can activate the outputs of a Damocles 1208 unit over the network. This feature does not require any software.


  • High temperature at the air conditioning outlet (Poseidon 3262) turns on a warning light in the IT department in another building (Damocles digital output).
  • 7 water leak detectors laid out in one floor of an office building control outputs O1 through O7 over IP. All outputs control a warning light and a horn. In case of flooding, the horn sounds, and the indication of output states on the Damocles 1208 unit informs the operator about the exact zone.

Online video

Online video

Comparation of Damocles

Comparation of Damocles

  Damocles 2404i Damocles 1208 Damocles MINI
Digital Inputs 24 Dry Contacts 12 Dry Contacts 4 Dry Contact
+ DI counter ano ano ano
Digital Outputs (DO)  4 Relays 8 Open Collectors 2 Relays
RS-232 configutation ne ne ano
XML (over HTTP) ano ano ano
Modbus/TCP ano ano ano
SNMP, SNMP Traps ano ano ano
SMTP Email ano ano ano
SDK (Software Development Kit) 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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