Measurement Computing USB-CTR04 - Manual (Page 7)

Chapter 3
Functional Details
External components
The USB-CTR04 has the following external components, as shown in Figure 2.

Two screw terminal banks
 Device Status and Activity LEDs
 USB connector
1 Screw terminals 1 to 28 4 Activity LED
2 Screw terminals 29 to 56 5 USB connector
3 Status LED
Figure 2. USB-CTR04 external components
Screw terminals
The device has two banks of screw terminals that provide the following connections:

Four counter inputs
 Four counter outputs
 Four counter gates
 Eight DIO
 Four timer outputs
 External trigger input
 External clock input
 Internal clock output
 Power output
 Digital grounds
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