AQ-S254 Alarm and indication IED

AQ-S254 alarm and indication IED can be applied to various substation tasks: extending the general I/O, sounding alarms, and control. You can add up to fourteen (14) I/O or communication cards into the device, depending on the requirements pf your application. The logic programming are powerful and easy to use, and it further expands the unit’s application range towards more demanding control, alarm and indication needs. The HMI is large and can be freely programmed, and it provides a quick visualization of the object as well as the status of alarms and events. AQ-S254 communicates using various protocols, including the IEC 61850 substation communication standard.



  • Modern alarm sounding and I/O extension with IEC 61850 and GOOSE communication.
  • A full MIMIC with busbar coloring.
  • A full-color display for up to 128 alarms.

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  • Number of objects to control and monitor: 10
  • Number of indicators to monitor: 20
  • Number of alarms to program: 128
  • Number of setting groups: 8
  • Digital inputs (fixed): 3
  • Digital outputs (fixed): 5
  • Options (14 slots)
  • Digital inputs: +8/16/24/32/40/48/56/64/72/80/88/96/104/112
  • Digital outputs: +5/10/15/20/25/30
  • Milliampere I/O module (4 mA outputs + 1 mA input)
  • External I/O modules (see "Accessories" tab)
  • Communication media (specified in the "Communication" tab)
  • Event recorder (max. 15 000 permanent event records)
  • Disturbance recorder (max. 100 records á 5 seconds at 3.2 kHz sampling)
  • Communication inputs
  • RJ-45 100 Mbps Ethernet (front panel, fixed)
  • RJ-45 100 Mbps Ethernet and RS-485 (rear panel, fixed)
  • 2 x RJ-45 100 Mbps Ethernet with an IRIG-B input (optional)
  • 2 x ST 100 Mbps Ethernet with an IRIG-B input (optional)
  • 2 x LC 100 Mbps Ethernet (PRP/HSR) (optional)
  • RS-232 serial fiber (PP/PG/GP/GG) (optional)
  • Communication protocols
  • IEC 61850
  • IEC 60870-5-101/104
  • IEC 60870-5-103
  • Modbus/RTU and Modbus/TCP
  • DNP3
  • SPA
  • AX007 External 6-channel 2-/3-wire RTD input module (pre-configured)
  • AX008 External 8-channel thermocouple and mA input module (pre-configured)
  • AX013 Raising frame (120 mm)
  • AX014 Raising frame (40 mm)
  • AX015 Wall mounting bracket