ZX Spectrum Plus3 Serial

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If it is needed to connect any serial devices to the +3 it requires a serial lead with connections as follows:

Pinout

    ___________________________
 __|   6   5   4   3   2   1   |
|__   ### ### ### ### ### ###  |
   |___________________________|

            RS232 socket

Pin	Name	Description
1	GND	Ground
2	TXD	Transmit Data
3	RXD	Receive Data
4	DTR	Data Terminal Ready
5	CTS	Clear To Send
6	+12V	+12 VDC

Contributors

Joakim Ögren

Source

Sunsite.dk Hardware Book: ZX Spectrum +3 Serial