Measurement Computing USB-7204 - Manual (Page 12)

USB-7204 User's Guide Functional Details
12
Sync jumper (P6)
The Sync jumper internally connects the SYNC pin on the Trigger/Sync connector to the SYNC pin on the
screw terminal. Remove this jumper on boards that will not send/receive the SYNC signal through the
SYNC/TRIG connector. Refer to Figure 2 on page 10 for the location of this jumper.
Trigger jumper (P7)
The Trigger jumper internally connects the TRIG_IN pin on the Trigger/Sync connector to the TRIG_IN pin on
the screw terminal. Remove this jumper on boards that will not send/receive the TRIG signal through the
SYNC/TRIG connector. Refer to Refer to Figure 2 on page 10 for the location of this jumper.
USB connector
The USB connector provides +5 V power and communication. The voltage supplied through the USB connector
is system-dependent, and may be less than 5 V. No external power supply is required.
This connector operates in parallel with the OEM connector — do not connect to both the USB connector and
the OEM connector.
LED indicators
The USB-7204 has LEDs for power and communication status. See Figure 2 for the location of each LED.
LED type Indication
Power Steady green: The device's microcontroller is connected to a computer or external USB hub.
Status Blinking green: data is being transferred over the USB bus.
Screw terminals
The screw terminals provide the following connections:
 Eight analog input connections (
CH0 IN to CH7 IN )
 Two analog output connections (
D/A OUT 0 to D/A OUT 1 )
 One external trigger source (
TRIG_IN )
 One SYNC terminal for external clocking and multi-unit synchronization (
SYNC )
 One external event counter connection (
CTR )
 Five analog ground connections (
AGND )
 One ground connection (
GND )
 16 digital I/O connections ( Port 0 Bit 0 to Port 0 Bit 7 , and Port 1 Bit 0 to Port 1 Bit 7 )
 One output power connection ( +5V
USER
)
 Three ground connections ( GND )
Screw terminal connections are shown in Figure 4.