AHD 408 E
Stand-by Pump Control for 2 Electrically Driven Pairs of Pumps, with Black-out Function
The stand-by pump control AHD 408 E is a microprocessor-controlled device for the independent control and monitoring of 2 pairs of electrically driven pumps, with stand-by control and black-out-function.
Product Features
- 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%
- Selector push switch for main pump and push switch for setting the pair of pumps to operation, LED indication for operation of main or stand-by pump, stand-by alarm and normal pressure indication integrated in front panel of the unit for each pair of pumps
- After switching on, build-up of pressure is performed by stand-by pump, thereafter change over to operation with main 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 “ON”
- Black-out function (LED indication in front panel of the unit) with switching off of all pumps, and configurable delayed start at restoration of mains power, to avoid overload conditions
- 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
- Unit controllable by serial data communication with external data station and there connected switches