Damocles2 1208: Secure I/O over Ethernet

 Damocles2 1208 is an Ethernet I/O unit with enhanced security and an excellent cost per I/O pin ratio. Inputs and outputs can be controlled over the secure Web interface or various M2M protocols.

Digital inputs can be used to connect up to 12 dry contacts (e.g. door contacts) or S0 pulse outputs (e.g. electricity meter).
Digital outputs (open collector) can be used to control relays, or for example switch 110/230V sockets (via PowerEgg2).

Damocles2 1208 fits on a DIN rail. Outputs are OC (Open Collector), can control external relays but are not electrically isolated.

  • E-mail and SMS Alerts

When the state (open/closed) of a contact connected to a digital input changes, Damocles2 can send an e-mail to a maximum of 5 recipients (or a SNMP Trap / SMS alert).

Dry contact alarm can be delayed (for example to send an alert if a cooler door stays open for more than 5 minutes). Damocles2 can send e-mail using the secure TLS protocol.

All HW group devices can send text messages (SMS) through a single central gateway, the HWg-SMS-GW. Just a single SIM card can serve all your devices.

  • Remote digital outputs (Box-2-Box mode)

Digital outputs (DO) of Damocles2 1208 can be controlled over a LAN from other HW group products. We call this the “Box-2-Box” mode. For example, alarms from several Poseidon2 units or water leak detectors can be signaled at a single location with a single Damocles2 1208 unit.

  • Secure signaling of I/O states over a LAN

Damocles2 supports secure protocols for M2M communication with central software.

  • SNMP v3
  • MQTT for cloud (IoT) applications
  • XML over HTTPs
  • TLS for sending e-mail
  • Applications

A typical application of Damocles2 1208 is secure connection of remote DI (digital inputs) and DO (digital outputs) to a software. Customers use it to monitor doors in a building, security system status, or various detectors. It can be connected to over 50 different third-party SNMP or SCADA applications.

Some customers use Damocles2 and its S0 counter function in smart homes to monitor the technology and for water or electricity consumption billing (with a S0 energy meter).

Online Demo .....


Technical Brochure ....


User Manual.....


Technical Specifications

  • Ethernet: RJ45 (10/100 BASE-T)
  • WEB: Built-in web server (IPv6, HTTP, HTTPs)
  • Data logging  Data logger for more than 250.000 records
  • Digital outputs (DO): 8 x DO digital outputs, NO/NC relay contact)
  • Digital inputs (DI): 12 x  dry contact input (for state detectors) Supports: Door contacts, smoke detectors, 110/230V power supply detector, water leak detector, fan failure detector, electricity meter with a S0 output, water meter with a S0 output.
  • Pulse Counter: 32-bit S0 counter at every dry contact digital input (DI)
  • Power supply: 9-30V DC
  • Operating temperature: -30°C to +65°C (14°F to +140°F)
  • Mechanical: Plastic box, wall-mountable, DIN rail, 145 x 90 x 40 [mm] (H x W x D)
  • Warranty: 2 years
  • Cloud support: HWg-Push protocol, MQTT
  • Reaction to a change at a DI (dry contact): SNMP trap, Email (TLS), SMS
  • Sending text messages (SMS) and dialing numbers: Alerts can be sent as text messages (SMS) via a remote “HWg-SMS-GW3” over the network, to a maximum of 5 phone numbers.
  • M2M communication protocols: SNMP (SNMP version 1 and version 3), XML (HTTPs), Modbus/TCP, MQTT, HWg-Push
  • Box-2-Box mode: DO of Damocles2 can be used as outputs by other HW group products on the same LAN.
  • 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)


Damocles2 product family

  Damocles2 MINI
Damocles2 1208
Damocles2 2404
LAN Interface
DO (Digital Outputs) 2
(Open Collector)
DI (Digital Inputs) 4 12 24
32bit pulse counter on each DI
HWg-SMS-GW support
HWg-Push protocol (required for SensDesk.com)
SNMP v3 & HTTPs secure protocols
-48V power for Telco
VDO (Virtual Digital Output)
PoE (IEEE 802.3af) support


Usage Examples

  • Central indication of equipment status
    Damocles2 1208 signals alarm states from several Poseidon2 or WLD units dispersed around a building (VDO – Virtual Digital Output). 
  • Energy consumption metering
    Counting of pulses from S0 outputs of electricity / water / gas meters.
    Conversion to price per time period using HWg-PDMS and MS Excel.
  • Interface for connecting I/O to the Ethernet (high security web IO)
  • Connecting I/O to a cloud portal (MQTT protocol)
  • Remote monitoring of dry contact inputs:
    monitoring of various legacy technologies over IP
  • Smart buildings: States of inputs and outputs can be shared in several different applications. Secure communication over IP (HTTPs / SSL security).

Software and Applications

  • Configuration: UDP Config  – Configuring the IP address
  • Reaction to events: HWg-Trigger (MS Windows)
    Sends a text message or displays a warning whenever a value is out of a specified range or a monitored device fails
  • Monitoring and logging: HWg-PDMS
    Monitoring software, graphs, database of readings, output to MS Excel
  • Online service for remote monitoring: www.SensDesk.com



Water Leak Detector

Gas Leak Detector

Smoke Detector

Motion (PIR) Detector

Door contact

Shock senor

Voltage Detector