EXII-7720SC 3M TOUCH SYSTEMS, EXII-7720SC Datasheet - Page 12

• Manufacturer Part Number: EXII-7720SC
• Manufacturer: 3M TOUCH SYSTEMS

Specifications of EXII-7720SC

• Operating Temperature (min): -40C
• Operating Temperature Classification: Commercial
• Operating Temperature (max): 70C
• Rad Hardened: No
• Lead Free Status / Rohs Status: Compliant

12
Mounting the Controller
Supplying Power to the Controller
PC Side (9-Pin D)
Pin
1
2
3
4
5
6
7
8
9
Sleeve
Pin
Shell
RS-232 Assigned
Data Carrier Detect
(DCD)
Receive Data (RXD)
Transmit Data (TXD)
Data Terminal Ready
(DTR)
Signal Ground
Data Set Ready (DSR)
Request to Send (RTS)
Clear to Send (CTS)
Not Used
Table 1 COM Cable for EX II 17xxSC and 77xxSC Controller
The uncased controller is mounted internally. 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 is mounted
in line with the touch screen cable exit point to minimize cable flexing. The controller is
mounted behind or on the side of the display on stand offs to allow room for the touch
screen cable connector. Refer to Figure 1 for more details on controller mounting.
You must supply the EX II controller with power. You can use internal power (that is, tap
power from inside the monitor or PC) or external power.
However you supply power, the source must deliver 85 mA typical (110 mA maximum),
with a maximum ripple and noise of 50mV peak-to-peak.
You can supply power to the ClearTek II controller using any of the following methods.
The voltage input can vary from +5VDC to +12VDC. Exact specifications can be found
in the appendices.
To avoid possible damage to the controller, you must provide a path for electrostatic
discharge. The controller-mounting hole near the touch screen 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.
CAUTION
3M Touch Systems Proprietary Information
Jumpered to:
4 and 6 DTR and DSR
1 and 6 DCD and DSR
1 and 4 DCD and DTR ⎯
Wire
Color
⎯
Brown
Red
⎯
Blue
Black
Green
White
⎯
⎯
EX II Serial Controllers Reference Guide
Controller Side (7-Pin Molex)
Pin
None
2
3
None
5
None
1
4
7
7
6
Description
Transmit Data (TXD)
Receive Data (RXD)
Power supply ground
Request to Send (RTS)
Clear to Send (CTS)
Do not ground
DC power jack (+5 VDC)
Cable shield connected to
ground. DC power jack ground
Chassis (earth) ground