Datasheet

CTI – SOFTWARE DEVELOPMENT GROUP

File: AMI technical Guide v1.pdf - Date: 04/02/2008

1.1. MAIN FEATURES

The main features of the AMI are the following:

• Support of DAAS (Domestic Appliance Acquisition System) and MACS (Major Appliance

Communication System) standard communication protocols from Electrolux. DAAS is a point-

to-point protocol that allows the communication between an electronic appliance and an

external unit. MACS is a peer-to-peer bus protocol that allows the communication among

different units both inside and outside an electronic appliance.

• Full backward compatibility with the previous DAAS modules from Electrolux.

• External power supply (maximum absolute range): from 7.5V

to 12V

unregulated. The

recommended power supply value is 9V

unregulated.

AMI module automatically uses the external power supply when you connect the

corresponding connector.

• Output Current: the AMI is able to provide to the target board a regulated 5V

power supply.

This is order to allow the configuration of a board without the need to connect it to the mains

power supply. The typical value of the maximum current that you can draw from the interface

module depends on whether you use an external power supply or not. If you use an external

power supply, the AMI is able to provide up to 150mA (with less than 5% in output voltage

drop). If you use instead only the power supply from the USB cable, the AMI is able to

provide up to 80mA (with less than 5% in output voltage drop).

• USB power capability: if the module is attached to the host PC via the USB cable, in most

cases it is not necessary to provide an external power. You must use an external power supply

when the target board absorbs more than 80mA. This may be the case when you use the AMI

to program a board with several LEDs and/or an LCD display that is not connected to the mains

supply (230 V

• The AMI module is designed to ensure 3750 V

isolation between the primary and the

secondary stage. The primary stage is the AMI portion that is electrically in contact with the

host personal computer. The secondary stage is instead the AMI portion that is electrically in

contact with the target electronic board.

• AMI units for field service applications are 100% tested for electrical insulation up to 2500

• The Power LED is green when the module is powered on. If you use an external power supply,

you can notice that the green color of the LED is brighter.

• The Secondary Power LED is yellow when +5V

is present on the secondary stage. +5V

power supply is present in the secondary stage both when you enable it with the secondary

power switch and when the AMI is connected to an appliance connected to the mains voltage.

• You connect the AMI to the PC using a USB 2.0 male A to male B cable. The maximum

length of the cable is 5 meters. However the recommended length is 1.8 meters or less. The

longest the USB cable, the highest is the chance of communication errors. This is true

especially when you are using the MACS communication protocol.