PD Sentry Event and Alarm Relay

The alarm and event relayer is built to receive alarms from isolated networks and to forward them to another network of a lower information security classification where monitoring is being performed. No compromising data is transferred between the domains!


  • One-way connection between two networks (also known as Simplex)

  • Based on hardware. No physical risk of sending data in false direction

  • Fiber optical links for galvanic separation between networks

  • UDP and SNTP support

  • Can be used in any ethernet application using fiber or copper connectivity

  • All data will be transparently forwarded, no extra software needed. The datalines are psysically cut/interrupted on circuit board. This completely eliminates the risk for data flowing in false direction  

  • Versions
    • Module
    • Integrated
    • Rugged and TEMPEST Level A/ EMSEC/ RÖS U1
    • Fiber Optical or Copper interface
    • 100 Mbit/s or 1000 Mbit/s

Technical Data


  • Connections RJ45x2

Power supply

  • Power consumption 7W


  • Temperature range Operating, +10 till +40 C. Storage, 0 till +70 C
  • Relative humidity Operating, to 95%. Storage, 5 % to 95% – non condensing

Dimensions and Weight

  • Size 115 (H), 20 (W), 195 (D) mm. 4.5 (H), 0.8 (W), 7.7 (D) inch
  • Weight 0.15kg/0.33lbs


  • RFC 1157 SNMP v1
  • RFC 3416 SNMP v2



Associated products