Specifications

CARROLL TOUCH Chapter 3 - General Programming Issues
Touch System Programmer’s Guide 3-3
based controller (SBC), hardware-based controller (HBC), and RS-232
controller. A guided wave touch system uses HBCs or RS-232
controllers. Figure 3-2 illustrates the RS-232 controller hardware.
Figure 3-2. RS-232 Controller Hardware (Modular IR Touch Systems)
The RS-232 controller is a PCB that has its own protective housing and
requires an external power supply. The RS-232 controller
communicates with the modular touch frame via the MDI cable and with
the host computer through the host serial port.
The RS-232 controller communicates serially with the host computer
using a selectable baud rate (300, 600, 1200, 2400, 4800, 9600, 19,200
or autobaud) and parity (odd, even, none, autoparity). Default values for
the RS-232 controller are autobaud and autoparity.
Figure 3-3 illustrates the SBC and HBC controller hardware. The SBC
and HBC are PCBs that fit into an expansion slot of an IBM-compatible
PC, communicating with and drawing power for the touch system
directly from the host through the PC bus. Both controllers
communicate with the modular touch frame via the MDI cable.
The SBC and HBC communicate with the host via several I/O registers.
The SBC and HBC also support interrupt-driven communications.
RS-232 Cable
MDI/Sensor Cable
Host PC
External
RS-232
Controller
Controller
(Guided Wave
or Modular IR
Touch Frame)