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3M™ MicroTouch™ Controller EX Serial Reference Guide
3M Touch Systems, Inc. Proprietary Information -- 29087v03
A method of establishing the serial data communication between the controller and
your system. The standard 3M™ MicroTouch™ RS-232 serial cable (P/N 7310101)
is recommended.
A method of supplying power to the controller -- either internal or external.
A touch driver with a calibration routine. You can use 3M™ MicroTouch™ MT 7
software which includes the necessary touch driver and utilities software.
Handling and ESD Protection
When mounting the sensor and controller, use normal precautions for handling
electrostatic sensitive devices. The EX serial controllers have internal protection to
±27kV for ESD discharges to the sensor (not to the controller directly) that may occur
during normal operation of the sensor. Refer to the appendices for further specifications.
EX Serial Controller Communication Connections
You will need a method of establishing the serial data communication between the
controller and your system. You can build your own or purchase the standard 3M™
MicroTouch™ RS-232 serial cable (P/N 7310101). Table 1 describes the pins for this
cable, which connects to a serial communication (COM) port on the PC.
Table 1 COM Connections for EX Serial Controllers
9-pin D 7-pin Molex Wire Color Description
1
No
connection
———
Data Carrier Detect (DCD).
Connected to DTR and DSR.
2
2
Brown
Transmit Data (TXD). Pin 2 is the controller’s
output to the host.
3
3
Red
Receive Data (RXD). Pin 3 is the controller’s
receive from the host.
4
No
connection
———
Data Terminal Ready (DTR).
Connected to DSR and DCD.
5
5
Blue
Power supply ground.
6
No
connection
———
Data Set Ready (DSR).
Connected to DTR and DCD.
7
1
Black
Request To Send (RTS).
Connected to CTS.
8
4
Green
Clear To Send (CTS).
Connected to RTS.
9
Not used
Sleeve
6
White
DC power jack (+5 VDC).
Pin
7
Shield
Cable shield connected to ground
DC power jack (ground)
Shell
7
———
Chassis (earth) ground.
