F-1
A P P E N D I X F
A K - P r o t o c o l
I n t r o d u c t i o n
The AK-SAMT interface is a standardized communication interface for the
integration of engine emissions testing equipment into automated
emissions testing systems. The interface was defined by a working group if
German automotive manufacturers to provide interoperability of equipment
produced by different manufacturers. It is a de facto standard
communication protocol for test bench application. The protocol was
defined in 1991, but is not being actively developed anymore.
Interface Specifications
The serial interface is a RS 232C (V24) interface. At the back of the
analyzer, a 9-pin D-sub female connector (see Figure F-1) serves for
connecting a master computer.
Connector Pin Out
Pin Number
Signal Name
1 2 3 4 5
6 7 8 9
Figure F-1
9-pin D-sub Connector
2
RxD (Input)
3
TxD (Output)
5
GND (Ground)
Communication Parameter
Type
Response
Baud Rate
38.400
Data Bits:
8
Parity:
None
Stop Bits:
1
Handshaking:
None
