Usb Connector; Led Indicators; Screw Terminals - Measurement Computing USB-7204 User Manual

USB-7204 User's Guide
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 (

Two analog output connections (

One external trigger source (

One SYNC terminal for external clocking and multi-unit synchronization (

One external event counter connection (

Five analog ground connections (

One ground connection (

16 digital I/O connections (

One output power connection (

Three ground connections (
Screw terminal connections are shown in Figure 4.
to
CH0 IN CH7 IN
to
D/A OUT 0 D/A OUT 1
TRIG_IN )
)
CTR
)
AGND
GND )
to
Port 0 Bit 0 Port 0 Bit 7
)
+5V
USER
)
GND
Figure 4. Screw terminal pinout
12
)
)
SYNC
, and to
Port 1 Bit 0 Port 1 Bit 7
Functional Details
)
)