Measurement-computing USB-1608GX-2AO-OEM Instrukcja Użytkownika Pobierz pdf (Strona 12)

USB-1608GX-2AO-OEM User's Guide Functional Details

Single-ended mode pinout

Signal Name Description Pin

Signal Name Description

1 CH0 Channel 0 29 CH15 Channel 15

2 CH8 Channel 8 30 CH7 Channel 7

3 AGND Analog ground 31 AGND Analog ground

4 CH1 Channel 1 32 CH14 Channel 14

5 CH9 Channel 9 33 CH6 Channel 6

6 AGND Analog ground 34 AGND Analog ground

7 CH2 Channel 2 35 CH13 Channel 13

8 CH10 Channel 10 36 CH5 Channel 5

9 AGND Analog ground 37 AGND Analog ground

10 CH3 Channel 3 38 CH12 Channel 12

11 CH11 Channel 11 39 CH4 Channel 4

12 AGND Analog ground 40 AGND Analog ground

13 AOUT0 Analog output 0 41 AGND Analog ground

14 AGND Analog ground 42 AGND Analog ground

15 AOUT1 Analog output 1 43 +5V +5V output

16 AGND Analog ground 44 AGND Analog ground

17 NC No connection 45 NC No connection

18 GND Digital ground 46 GND Digital ground

19 DIO0 Digital input/output 0 47 AICKI AI clock input

20 DIO1 Digital input/output 1 48 AICKO AI clock output

21 DIO2 Digital input/output 2 49 AOCKI AO clock input

22 DIO3 Digital input/output 3 50 AOCKO AO clock output

23 DIO4 Digital input/output 4 51 TRIG Trigger input

24 DIO5 Digital input/output 5 52 GND Digital ground

25 DIO6 Digital input/output 6 53 CTR1 Counter 1

26 DIO7 Digital input/output 7 54 CTR0 Counter 0

27 GND Digital ground 55 TMR Timer output

28 GND Chassis ground 56 GND Digital ground

Signal connections

Analog input

You can configure the analog inputs for SE or DIFF mode. The input voltage range is software selectable for

±10 V, ±5 V, ±2 V, or ±1 V.

With SE mode, connect up to 16 inputs to

CH0 to CH15. SE mode requires two wires:

 Connect one wire to the signal you want to measure (

CHx).

 Connect one wire to the analog ground reference (

AGND).

With DIFF mode, connect up to eight differential inputs to

CH0H/CH0L to CH7H/CH7L. DIFF mode requires

two wires plus a ground reference:

 Connect one wire to the high/positive signal (

CHxH).

 Connect one wire to the low/negative signal (

CHxL).

 Connect one wire to the analog ground reference (

AGND).

Floating voltage source

When connecting DIFF voltage inputs to a "floating" voltage source, make sure the DIFF input channel has a

DC return path to ground. To create this path, connect a resistor from each low channel input to an AGND pin.

A value of approximately 100 kΩ can be used for most applications.

Leave unused input channels either floating or tied to an AGND terminal. Source impedances should be kept as

small as possible to avoid settling time and accuracy errors.

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 25 26

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