Damocles2 2404: Networked remote I/O with secure SNMP v3 and IPv6

Damocles2 2404 is an I/O unit for telecom applications featuring secure communication and 12V, PoE or -48V (Telco standard) power options.

Digital inputs (DI) can accept 12 dry contacts, digital outputs (DO) control 4 relays. Remote I/O can be controlled using secure SNMPv3 or HTTPs protocols or standard M2M protocols (SNMP, Modbus/TCP, XML). Support for IPv6 simplifies deployment in Telco applications.

  • Professional I/O signaling over a LAN

    • HTTP / HTTPs
    • SNMP v3
    • MQTT for cloud (IoT) applications
    • TLS for sending e-mail
    • -48V Telco power standard support
    • IPv6 support
  • Portal / Cloud support

    • I/O can be connected to the SensDesk portal.
    • The MQTT interface allows connection e.g. to the MS Azure cloud.
    • SMS GW can be used to signal Internet connectivity failure.
  • Applications

Damocles2 can be connected to various monitoring systems. We support over 50 different third-party NMS, SNMP, SCADA or Cloud applications. It can work as a snmp relay.

Damocles2 2404 is typically used to monitor many remote relay outputs.
Examples include fire detection, alerts from technical equipment, door contacts, etc. States of connected I/O are then displayed in the customer's monitoring system.

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damocles2 2404


Technical Features

  • Ethernet: RJ45 (10/100 BASE-T)
  • WEB: Built-in web server (IPv6, HTTP, HTTPs)
  • Data logger: Data logger for more than 250.000 records
  • Digital outputs (DO): 4x DO relay output (low-voltage NO/NC relay contact)
  • Digital inputs (DI): 24x DI for dry contacts (state detectors)
    • Pulse counters: 32-bit S0 counter at every DI
  • Power supply:
    • Power 1: 9-30VDC (consumption approx. 250 mA / 12V)
    • Power 2: PoE (IEEE 802.3af)
    • Power 3: -48V DC Telco standard (-30V to -60V)
  • Operating temperature: -30°C to +65°C (14°F to +140°F)
  • Mechanical: Plastic box, wall-mountable, DIN rail, 116 x 179 x 46 [mm]
  • Warranty: 2 years
  • Cloud support: HWg-Push protocol, MQTT
  • Reaction to a change at a DI: 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: Remote relay output for other HW group products
  • P mode: Supports IPv4 and IPv6
  • 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

  • Telco operators
    Remote equipment monitoring. Detection of power outages / UPS activation. Alert states, access to cabinets, alarm detection.

  • Smart buildings
    Values from inputs and outputs can be shared in several different applications. Relay outputs can be controlled as remote I/O.

  • Monitoring and controlling remote I/O over the Ethernet (high security) I/O status is securely communicated to the central system (HTTPs / SSL security).
  • Connecting I/O to a cloud portal (MQTT protocol)
  • Remote monitoring of dry contact inputs:
    monitoring of various legacy technologies over IP


  • Surveillance systems
    Connecting I/O to an IP CCTV system.
  • Remote equipment monitoring
    Monitoring of A/C, UPS, security system status (status relays)

  • Energy consumption metering
    Counting of pulses from electricity / water / gas meters. Conversion to price per time period using HWg-PDMS and MS Excel.

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


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Gas Leak Detector

Smoke Detector

Motion (PIR) Detector

Door contact

Shock senor

Voltage Detector