Measurement-computing E-1608-OEM Manuel d'utilisateur télécharger pdf (Page 14)

E-1608-OEM User's Guide Functional Details

Connector W2

Header connector W2 provides connections for the DIO, external clock I/O, trigger, counter, power output, and

digital ground reference.

W2 pinout

Signal name

Pin description

Signal name

Pin description

DIO0

DIO channel 0

DIO1

DIO channel 1

DIO2

DIO channel 2

DIO3

DIO channel 3

DIO4

DIO channel 4

DIO5

DIO channel 5

DIO6

DIO channel 6

DIO7

DIO channel 7

GND

Digital ground

+VO

User voltage output

GND

Digital ground

AICKO

External clock pacer output

AICKI

External clock pacer input

CTR

Counter input

TRIG

Digital trigger input

GND

Digital ground

Connector W4

Header connector W4 provides connections for the analog inputs, analog outputs, and the analog ground

reference.

W4 pinout

Signal name

Pin description

Signal name

Pin description

CH0H

Channel 0 high (SE channel 0)

CH0L

Channel 0 low (SE channel 1)

AGND

Analog ground

CH1H

Channel 1 high (SE channel 2)

CH1L

Channel 1 low (SE channel 3)

AGND

Analog ground

CH2H

Channel 2 high (SE channel 4)

CH2L

Channel 2 low (SE channel 5)

AGND

Analog ground

CH3H

Channel 3 high (SE channel 6)

CH3L

Channel 3 low (SE channel 7)

AGND

Analog ground

AOUT0

Analog output 0

AGND

Analog ground

AOUT1

Analog output 1

AGND

Analog ground

Screw terminal connectors

Screw terminals J1 through J3 and J7 through J9 are unpopulated. When populated, the screw terminals provide

alternative connections to the header connectors. Refer to the Specifications chapter for screw terminal pinouts.

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 eight inputs to CH0x to CH3x. SE mode requires two wires:

 Connect one wire to the signal you want to measure (CH#x).

 Connect one wire to the analog ground reference (AGND).

With DIFF mode, connect up to four differential inputs to CH0H/CH0L to CH3H/CH3L. 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.

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Measurement-computing E-1608-OEM Manuel d'utilisateur Page 14

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