AQ-S254 Alarm and indication device


The AQ-S254 alarm and indication device 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 of your application. The logic programming is powerful and easy to use. It also further expands the device’s application range towards more demanding control, alarm and indication needs. The HMI is large and can be freely programmed, and 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.
  • Control and status indication for 20 objects.
  • A full mimic diagram with busbar coloring.
  • A full-color display for up to 128 alarms.

Technical data

  • 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

  • Event recorder (max. 15 000 permanent event records)
  • Disturbance recorder (max. 100 records á 5 seconds at 3.2 kHz sampling)

  • Digital inputs (fixed): 3
  • Digital outputs (fixed): 5
  • Number of empty slots: 14
  • Digital inputs: +8/16/24/32/40/48/56/64/72/80/88/96/104/112 (optional)
  • Digital outputs: +5/10/15/20/25/30 (optional)
  • Milliampere I/O module (4 mA outputs + 1 mA input)
  • Communication media (see "Communication" below)
  • External I/O modules (see "Accessories" below)

  • 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 (edition 1)
  • IEC 61850 (edition 2)
  • 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

Additional material

Application Drawing

An application image for AQ-S254A alarm and indication device showing a system with SCADA, an alarming system of one AQ-S254A device, and a protection and control system of four unspecified AQ 200 series devices.

Device Rear Image

Device rear image_AQ-254-AAAAAAAAAAAAAA

Device and Cut-out Image

AQ-250 dimensions and cut-out

Order Code

Order code_S254A

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