This page outlines how to construct a GReddy e-Manage (Blue) Support Tool cable.
This page also links to the required PC software and wiring diagrams.
If you've found my work helpful and would like to donate a beer! PayPal.Me/wilbo666wiring
The GReddy e-Manage (Blue) has a USB connector on it, however it does not support USB communications, this can catch quite a number of people out when they go to connect their GReddy e-Manage (Blue) unit to their PC for tunning.
GReddy charge quite a significant amount of money for their 'Support Tool', which effectively simply takes the TTL voltage level (0V to 5V) serial data from the e-Manage unit and converts it to standard PC serial port RS232 voltage serial data for the PC.
It isn't particularly hard to construct a Support Tool Cable yourself and the following information should allow you to construct your own GReddy e-Manage (Blue) Support Tool Cable. This design fits the PCB and required components inside a conventional plastic DB9 housing.
As a further note I have also successfully used this design with USB to RS232 serial converters with laptops that are not equipped with a serial port from factory.
QTY |
Units |
Part |
Description |
Supplier |
Supplier Part Number |
1 |
ea |
PCB |
Bare PCB |
|
|
5 |
ea |
CAPACITOR, 0805, 100NF, 50V, X7R |
Capacitor Chip NPO dielectric |
element14 |
|
1 |
ea |
DE9-F |
DE9 Female Connector - Solder |
Jaycar |
|
1 |
ea |
MAX202ID |
RS232/TTL Level Convertor IC |
element14 |
|
1 |
ea |
DB9 Plastic Backshell |
DB9 Plastic Backshell |
Jaycar |
|
1 |
ea |
USB Cable |
Lead, USB1.1 A Plug, 1.8M |
element14 |
Type A (Controller) USB Port Pin: |
Connection |
Standard USB Cable Colour |
Pin 1 (+5V Power) |
Power to TTL/RS232 level convertor PCB |
Red |
Pin 2 (RxD: Data to e-Manage) |
Data FROM TTL/RS232 level convertor IC (TTL data TO e-Manage) |
White |
Pin 3 (TxD: Data from e-Manage) |
Data TO TTL/RS232 level convertor IC (TTL data FROM e-Manage) |
Green |
Pin 4 (Ground) |
Ground to TTL/RS232 level convertor PCB |
Black |
DE-9 PC Serial Port Pin: |
Direction (From PC Perspective) |
Connection / Requirement |
Pin1 (DCD: Carrier Detect) |
IN |
No Connection |
Pin 2 (RxD: Received Data) |
IN |
From TTL/RS232 Convertor IC (RS232 TO Serial Port) |
Pin 3 (TxD: Transmitted Data) |
OUT |
To TTL/RS232 Convertor IC (RS232 FROM Serial Port) |
Pin 4 (DTR: Data Terminal Ready) |
OUT |
No Connection |
Pin 5 (G: Common Ground) |
OUT |
Ground |
Pin 6 (DSR: Data Set Ready) |
IN |
From TTL/RS232 Convertor IC (RS232 Logic ‘0’ Voltage) |
Pin 7 (RTS: Request To Send) |
OUT |
Connect to DE9 Pin 8 via PCB (RTS to CTS) |
Pin 8 (CTS: Clear To Send) |
IN |
Connect to DE9 Pin 7 via PCB (RTS to CTS) |
Pin9 (RI: Ring Indicator) |
IN |
No Connection |
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