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Integrating the SC400 Controller
Table 1 COM Cable for SC400Controller
PC Side (9-Pin D)
Pin
RS-232 Assigned
1
Data Carrier Detect (DCD)
2
Receive Data (RXD)
3
Transmit Data (TXD)
4
Data Terminal Ready (DTR)
5
Signal Ground
6
Data Set Ready (DSR)
7
Request to Send (RTS)
8
Clear to Send (CTS)
9
Not Used
Sleeve
Pin
Shell
Mounting the Controller
The controller is designed for internal mounting only. Choose a convenient spot away
from high-voltage, high power cables and electronics. Use 4-40 metal screws to mount
the controller using the two diagonal mounting holes in the board. The controller should
be mounted in line with the touch screen cable exit point to minimize cable flexing. The
controller should be mounted internally behind or on the side of the display on stand offs
to allow room for the touch screen cable connector.
Ensure that the tail and controller are aligned such that the tail remains straight (90°), not
pulled or twisted in an odd angle from the touch screen. Good engineering design avoids
awkward electrical connections.
Jumpered to:
4 and 6 DTR and DSR 8
1 and 6 DCD and
DSR
1 and 4 DCD and
DSR
3M Touch Systems Proprietary Information
Controller Side (8-Pin Molex)
Pin
Description
DCD, DTR, DSR
2
Transmit Data (TXD)
3
Receive Data (RXD)
8
DCD, DTR, DSR
5
Power supply ground
8
DCD, DTR, DSR
1
Request to Send (RTS)
4
Clear to Send (CTS)
Do not ground
6
DC power jack (+5 VDC)
7
Cable shield connected to
ground. DC power jack ground
7
Chassis (earth) ground
Recommended:
Wrap tail smoothly
Not recommended:
Do not twist the tail
11
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