Measurement-computing USB-7204 Uživatelský manuál stáhnout pdf (Strana 12)

USB-7204 User's Guide Functional Details

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.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 29 30

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