AHD 408 A

The stand-by pump control AHD 408 A is a microprocessor-controlled device for the independent control and monitoring of 2 loops, with main pump driven by ship main engine and electrically driven stand-by pump.

• Compact design for console, panel or switchbox installation
• Front dimension 72mm x 144mm, insertion depth 216mm
• Degree of protection IP 20 (front side, with protection cover IP 54)
• Weight approx. 1.0 kg
• Power supply 24 V DC +30%/-25%
• Push switch for setting to operation of stand-by control, LED indication for operation of stand-by pump and stand-by alarm, indication for high rotating speed of main engine and normal pressure indication integrated in front panel of the unit for each loop
• After switching on, build-up of pressure is performed by stand-by pump without release of stand-by alarm, after reaching speed, operation switch point changes over to operation with attached pump
• Automatic start of stand-by pump in case of pressure loss with stand-by alarm
• Reset of stand-by alarm by means of push switch to “ON”
• Engine speed input with function monitoring
• Lamp test push button
• Text field in front panel of the unit for easy replacement
• Relay output for pump contactors: potential free contacts, max. 250 V AC, 3 A
• Common alarm and common alarm repetition, potential free contacts, max. 48 V DC/AC, 1 A
• All connections on 24-pole terminal on rear side of the unit
• Inputs isolated from remaining electronics by means of optocouplers