Start/Stop System with Combined Alarm System for Diesel Engines. Unit AHD 514 A

propulsion diesel control system

Start / stop and control of propulsion diesel engines

Product Features

  • Profile module for installation on standard profile rails in consoles, control panels or control cabinets
  • Degree of protection IP 20
  • 1 speed input, galvanically isolated
  • 6 analog inputs (4 – 20 mA) / binary for status messages and alarm inputs
  • 6 analog inputs (Pt100/Pt1000) / binary for status messages and alarm inputs
  • Analog inputs configurable
  • 2 binary inputs, wire-breakage monitored
  • 8 binary inputs for control functions (remote start/stop, horn quit, overspeed test, etc.)
  • 2 binary inputs for fuse trip monitoring and charging alternator
  • 8 relay outputs, 6 A, potential free, for starter relay, engine control and alarm outputs
  • 2 transistor outputs, 8 A, wire-breakage monitored and short circuit-proof, for engine stop
  • 1 analog output (4 – 20 mA / 1 – 5 V DC / 2 – 10 V DC)
  • Power supply 24 V DC +30%/-25%
  • Integrated alarm and event log memory for logging up to 10,000 alarms and events. Recall of data via PC software.
  • 2 CAN-bus interfaces for data communication with AHD 514 S safety system and AHD 514 OP display and operation unit, as well as external alarm system (on demand)
  • 1 RS232 interface (9-pole Sub-D) for fault diagnostics / log read out / firmware-update
  • 1 serial input (optocoupler), i.e. for control inputs of external data station
  • 2 serial outputs (optocoupler), i.e. for external relay or display unit
  • Connections via pluggable terminal lists
  • Type approved by ABS, BV, CRS, DNV/GL, LR



AHD 514 A is a microprocessor-controlled device for starting and stopping propulsion diesel engines, assuming control of all required monitoring functions, incl. automatic stop at overspeed, with individual adaption to type series of different engine manufacturers.

Drawings and photos AHD 514-A

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