98000332621 Datasheet 98000332621, 98000332662, 98000329726 | P13-P15

3M™ MicroTouch™ Controller EX Serial Reference Guide 13

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 (between +5V 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).

14 3M™ MicroTouch™ Controller EX Serial Reference Guide

3M Touch Systems, Inc. Proprietary Information – TSD-29087 Rev D

1. Obtain a 7-pin Molex connector 51004-0700.

2. Attach power and ground to the connector, (Pin 6: +5V to +12V, Pin 7: Ground).

Using an External Wall-Mount Power Supply

If you are using a standard 3M™ MicroTouch™ RS-232 serial cable (P/N 7310101),

consult your applications engineer for power supply specifications.

Mounting the Sensor

There are several methods for mounting the sensor depending on your application. If you

need instructions or recommendations from 3M Touch Systems on how to incorporate a

sensor into your design, refer to the 3M™ MicroTouch™ System 3250EX Integration

Guide (P/N 19-278). All 3M Touch Systems documentation is available from the

corporate website at www.3Mtouch.com.

Turning On Your System

Before you turn on your touch system, ensure that all cables are connected properly and

that the controller is properly mounted. Be sure to tighten all cable connector screws.

To start up your system:

1. Turn on your display and computer.

2. Adjust the contrast and brightness to suit your personal preference and working

environment.

3. Adjust the horizontal and vertical position controls on the display to center the image

on the screen.

Status Light (LED) Diagnostics

3M™ MicroTouch™ controllers are highly reliable units; however, there may be

occasions when the controller does not perform exactly as you expected. The EX serial

controller provides diagnostic feedback with a light emitting diode (LED) on the

component side of the board that indicates the status of the touch system.

If the LED is on, and remains dimly lit, the controller has power and is operating

properly. If the LED is off, the controller is not receiving power.

When you power-up the unit, the LED is bright until the controller start-up sequence is

completed. Following start-up, the LED becomes dim and remains dim as long as you do

not touch the sensor. When you touch the sensor, the LED becomes bright as long as a

touch is detected.

A flashing (or blinking) LED during power-up indicates the controller’s power-on

self-test failed. Refer to Table 4 for a description of each error code.

3M™ MicroTouch™ Controller EX Serial Reference Guide 15

3M Touch Systems, Inc. Proprietary Information – TSD-29087 Rev D

Table 4 LED Diagnostic Codes for EX Serial Controllers

Self Test

Condition

LED

Flashes

Self

Test

Bit Description

What to do...

RAM Data

Error

1 0 Data side checksum error Reload program code.

RAM Code

Error

2 1 Firmware EEPROM

checksum verification error

Reload program code.

STRAY Error

3 2 Unable to initialize stray

cancellation

Replace controller. If error

reoccurs, might be a sensor

problem.

NOV Error

4 3 Parameters invalid (using

defaults)

Restore defaults. If fault persists,

replace controller. If error

reoccurs, might be a sensor or

cable problem.

HDW Error

5 4 Controller hardware failure

(phase/gain initialization)

Cycle power. If fault persists,

replace controller.

Reserved 6 5 Reserved

CABLE Error 7 6 Cable NOVRAM

linearization data invalid

At startup, the cable NOVRAM

error will flash the LED until the

controller receives a status

command from host.

NOV2 Error 8 7 Controller NOVRAM

linearization data invalid

Replace sensor or perform a 25-

point linearization. Contact

Technical Support.

Reserved 9 8 Reserved

EEPROM

Error

10 9 EEPROM is not working Reload program code.

NOV5 Error 11 10 Controller ID is not valid Restore defaults. If fault persists,

replace controller.

NOV6 Error 12 11 Interface configuration

values are not valid

Restore defaults. If fault persists,

replace controller.

NOV7 Error 13 12 Touch configuration values

are not valid

Restore defaults. If fault persists,

replace controller.

Reserved 14 13 Reserved

Resistance

Error

15 14 Sensor resistance is out of

supported range

Cycle power. If fault persists,

replace sensor.

Backplane

Error

16 15 Low resistance path from

backplane to sensor

Cycle power. If fault persists,

replace sensor.

Corner Error 17 16 Corner drive offset level is

too high

Cycle power. If fault persists,

replace controller.

Fixed Cal Error 18 17 Fixed 2-point cal error high Cycle power. If fault persists,

replace controller.

Note 1: this is a fatal error.

Note 2: this error is detected by the ROM code

Note 3: indicates that the EEPROM is not formatted when given by the ROM code

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98000332621

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