3M™ MicroTouch™ Controller EX Serial Reference Guide
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3M Touch Systems, Inc. Proprietary Information – TSD-29087 Rev D
Mounting the Controller
The cased controller is mounted externally. The uncased controller is mounted internally.
Choose a convenient spot away from high-voltage, high power cables and electronics.
Use 4-40 plastic screws to mount the cased controller to eliminate possible ESD input
path. Metal or plastic screws can be used on the 2x3 board if the green ground wire is
used. Metal screws are required on the 1x2 board if a separate ground wire is not used.
The controller should be mounted in line with the sensor flex tail exit point to minimize
flexing. Refer to Figure 1 for more details on controller mounting.
Supplying Power to the Controller
You must supply the EX serial controller with power. You can use internal power (that
is, tap power from inside the display or PC) or external power.
However you supply power, the source must deliver 85 mA typical (100 mA maximum),
with a maximum ripple and noise of 50mV peak-to-peak.
CAUTION
To avoid possible damage to the controller, you must provide a path for electrostatic
discharge. The controller-mounting hole near the sensor connector should be used to
connect to chassis safety ground and must be attached by the shortest possible route to
a good earth return (chassis) in all applications.
You can supply power to the controller using any of the following methods. The voltage
input can vary from +5VDC to +12VDC. Exact specifications can be found in the
appendices.
•
(EX112/EX152) Internal power +5V to +12 V DC through the 2-pin power input
connector pin 2 (+5V to 12 V) and pin 1 (RTN). A square pin indicator on the
bottom of the board marks pin 1.
•
Internal power (+5V to +12V DC) through a custom serial cable configuration.
•
External power (+5 V DC) from a wall-mount power supply.
Note:
To avoid possible damage to one or both of the power supplies, do not supply
both internal power and external power to the controller. Power from two sources could
cause damage.
Using an Internal Power Supply (+5V to +12V) to JP3
Provide power directly to the controller using JP3 (Molex 22-05-3021). Use a mating 2-
pin connector and connect Pin 2 to power (b5V and +12V) and Pin 1 to the
return. (Mating connector is the Molex housing 22-01-3027 with 08-50-0114 contacts).
Using a Custom Serial Cable Design
When creating a custom serial cable connection, you can provide power to the controller
through the mating Molex connector: (refer to Table 1 for more information on actual
cable connections).
Summary of Contents for MicroTouch EX Series
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