Techno-Isel Educational DaVinci, Setup, Page: 25 / 27

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Appendix A: Wiring & Switch Settings
Wiring Connections
The proper connections between the DaVinci and the PC are made when the enclosed
specially wired RS232 serial cables are used. The following diagram illustrates this
wiring set-up.
Diagram 5: Wiring Set-Up Between DaVinci And PC
The DaVinci uses a three-wire serial communication system (transmit, receive, ground).
Jumpers between pins 4 and 5, and between 6 and 20, can be used to disable hardware
handshaking. The Techno controller card is configured as a DTE system and the
computer (PC) host is assumed to be a DCE system (i.e., pin 2 sends information and pin
3 receives information). The serial controller makes use of standard circuits and will
operate with most PC's. The PC should be configured as a DCE device.
The communication parameters require the following settings:
9600 Baud
8 Bits
1 Stop bit
No Parity
1
2
3
4
5
6
7
8
9 1
2
3
4
5
6
7
8
9
Wiring For 9 To 9 Pin RS232 Serial Cable
WARNING: The set-up illus-
trated here shows the proper
wiring between the DaVinci and
the PC, which is provided by
the specially wired RS232 serial
cable that comes enclosed with
the unit.
DO NOT SUBSTI-
TUTE A STANDARD RS232
CABLE FOR THIS CABLE.
Do-
ing so may result in damage to
the DaVinci or PC.
DaVinci
RS232
port
9 pin
PC COM
port