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10
Figure 1. SC500 USB Controller Overall Dimensions
Handling and ESD Protection
When mounting the sensor and controller, use normal precautions for handling
electrostatic sensitive devices. The SC500 has internal protection to ±20 kV for ESD
air discharges to the touch screen (not to the controller directly) that may occur during
normal operation of the touch screen. Refer to Appendix A for further specifications.
Establishing the Data Connection
The SC500 USB Resistive Controller requires a 3M Touch Systems USB
communication cable (P/N 7319420) PC 99 compatible or an equivalent interconnect.
One end of this cable plugs into the USB connector (JP7) on the SC500 USB
Resistive Controller. The other end, which has a Type-A connector, plugs into a USB
port on your PC.
When creating a custom cable, use the Molex 51004-0500 mating connector. Table 1
describes the interconnections of the 3M Touch Systems USB cable.
Table 1. USB Cable for SC500 USB Resistive Controllers
PC Side (USB Type A)
Pin
USB Assigned
1
+5Vdc
2
Data (DN)
3
Data (DP)
4
0V
5
Cable Shield Shell
Wire
Color
Red
Gray
Green
Black
Charcoal
Gray
3M Touch Systems Proprietary Information
SC500 USB Controller Reference Guide
Controller Side (5-Pin Molex)
Pin
Description
1
+5Vdc Input Power
2
Data (DN) Differential Pair
3
Data (DP) Differential Pair
4
Power Return
5
Outer Cable Shield around signal and
power lines. Chassis (earth) ground
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