Measurement-computing USB-1616FS Manual do Utilizador descarregar pdf (Página 14)

USB-1616FS User's Guide Functional Details

To supply external power, connect the POWER IN connector to the supplied +9 V external power supply

(CB-PWR-9V3A).

The POWER OUT connector lets you power additional daisy chained MCC USB Series devices from a single

external power supply. The C-MAPWR-x cable is available from MCC to connect additional MCC USB Series

devices.

USB LED

The USB LED indicates the communication status of the USB-1616FS. This LED uses up to 5 mA of current

and cannot be disabled. The table below explains the behavior of the USB LED.

USB LED Illumination

USB LED

Indication

Steady green

The USB-1616FS is connected to a computer or external USB hub.

Blinks continuously

Initial communication is established between the USB-1616FS and the computer, or data is

being transferred.

PWR LED

The USB-1616FS incorporates an on-board voltage supervisory circuit that monitors the USB VBUS (5V) and

the external 9 V power supply. If the input voltage falls outside of the specified ranges the PWR LED shuts off

(see table below).

PWR LED Illumination

PWR LED illumination

Indication

Steady green

USB +5 V power or +9 V external power is supplied to the device.

Off

Input power is not supplied, or a power fault has occurred. A power fault occurs when

the input power falls outside of the specified voltage range:

 USB VBUS (+5 V): 4.75 V to 5.25 V

 External power: (+9 V): 6.0 V to 12.5 V

Screw terminals

The device has two rows of screw terminals. Each row has 26 connections. Signal labels are shown in Figure 4.

Figure 4. USB-1616FS screw terminals

The screw terminals provide the following connections:

 eight digital I/O terminals (DIO 0 to DIO 7)

 one external digital trigger terminal (TRIG IN)

 one power terminal (5V)

 eight ground terminals (GND 0 to 7)

 one external event counter terminal (CTR)

 one terminal for external clocking and multi-unit synchronization (SYNC)

 16 analog input terminals (CHANNEL IN 0 to 15)

 16 analog ground terminals (AGND 0 to 15)

Use 14 AWG to 30 AWG wire for your signal connections.

Caution! Keep the length of stripped wire at a minimum to avoid a short to the enclosure! When connecting

your field wiring to the screw terminals, use the strip gage on the terminal strip, or strip to 5.5 -

7.0 mm (0.215" to 0.275") long.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 29 30

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