SERIAL OUTPUT
The serial output can be used for data logging when an EFI system is not accessible. To run the
data stream, a RS-232 (DB-9) Female Receptacle must be purchased.
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Wire View of RS-232 (DB-9) Male Plug
Two wires need to be connected to a RS-232 serial port. The YELLOW wire from the AEM
thermocouple amplifier shall be connected to Pin #2 (RX) on the serial port for receiving data.
Pin # 5 (GND) on the serial port is the ground and should be connected to the Blue wire. If a
standard 9-pin serial cable is to be cut instead, the (RX) wire is typically RED and the (GND)
wire is typically GREEN. However, this should be confirmed with a continuity tester before
attempting.
Use HyperTerminal for testing the data stream. This software is found on most PCs. To find
HyperTerminal go to: Start | All Programs | Accessories | Communications | HyperTerminal.
Name the New Connection and click OK. Set the COM port to the one being used and click OK.
Bits Per Second = 19,200
Data Bits = 8
Parity = None
Stop Bits = 1
Flow Control = Hardware
Verify the settings above and click OK. When power is supplied to the AEM Thermocouple
amplifier, temperature data will be displayed, as shown below.
Junction Temp, Temp1, Temp2, Temp3, Temp4 (in degrees C)
AEM Inc. 2005
Thermocouple Amplifier
Version 1
23.1, 122, 255, 700, 390
23.1, 122, 255, 700, 390
23.1, 122, 255, 700, 390
23.1, 122, 255, 700, 390
23.1, 122, 255, 700, 390
23.1, 122, 255, 700, 390
Data logging with HyperTerminal
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