March 2015
I have an early X10 Home Control Timer (Model CP-290) to which I have lost the programming cable. Does anyone know where I can get the pinout so I could fashion my own replacement cable?
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The CP-290 is very old and was sold in the early 1980s. The communication protocol is RS232 serial
Baud Rate: 600
Data Bits: 8
Parity: None
Stop Bits: 1
The connector on the back is a standard 5-Pin DIN socket. Looking at the back of the unit the pins are 5-4-3-2-1 starting at the left and going counter-clockwise to the right with pin 5 on the left, 3 on the bottom and 1 on the right.
Pin 1 - No Connection
Pin 2 - Receive Data (In)
Pin 3 - Ground
Pin 4 - Transmit Data (Out)
Pin 5 - No Connection
To plug into a computer like an IBM compatible these connections would go to a 9-Pin female serial connector:
CP290 —> DE9
2 RxD —> 3 Txd
3 Gnd —> 5 Gnd
4 TxD —> 2 RxD
Attached is a scanned image from the manual.
The 5-pin DIN (pins 1-5) — The middle pin (3) is GND, the pins on either side (2 & 4) are Rx & Tx. I don't recall which. You might have to swap them to work. The outer pins are not connected.
From the CP290 programming guide:
Pin 1 - No Connection
Pin 2 - Receive (input)
Pin 3 - Ground
Pin 4 - Transmit (output)
Pin 5 - No connection
Looking at the face of the connector with Pin 1 at the 3 o'clock position and Pin 5 at the 9 o'clock position.
