Measurement-computing USB-2627 Manual do Utilizador descarregar pdf (Página 11)

USB-2627 User's Guide Signal Connections

Cabling

Use a CA-68-3R cable (Figure 3) when connecting signals to the SCSI connector.

Figure 3. CA-68-3R cable

Signal termination

 TB-100 – screw terminal board that connects to SCSI connector P1 with a CA-68-3R cable. A 19-inch rack

mount kit (RM-TB-100) is also available.

The following table lists how TB-100 screw terminals are mapped to the SCSI connector pins.

TB-100 to SCSI connector pin map

TB2 terminal

SCSI pin

TB1 terminal

SCSI pin

+5V

ACH0

GND

ACH8

AGND

ACH1

ACH9

AGND

ACH2

ACH10

AGND

ACH3

ACH11

AGND

ACH4

ACH12

AGND

ACH5

ACH13

AGND

ACH6

ACH14

AGND

ACH7

ACH15

XDAC3

SGND

NC (Note 1)

TTL TRG

XDAC2

GND

GND (Note 2)

GND

CNT0

AGND

CNT1

XDAC0

CNT2

AGND

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 28 29

User's Guide 1
HM USB-2627.docx 2
Table of Contents 3
Chapter 5 4
About this User's Guide 5
Introducing the USB-2627 6
Functional block diagram 7
Installing the USB-2627 8
Installing the hardware 9
Configuring the hardware 9
Calibrating the hardware 9
Signal Connections 10
Cabling 11
Signal termination 11
Functional Details 14
USB-2627 components 15
Signal descriptions 16
Analog output 17
Digital I/O 17
Counter input 18
Trigger input 18
Timer output 18
USB power 19
Mechanical drawing 19
Specifications 20
Digital input/output 22
External trigger 23
External clock 23
Counter 23
Environmental 25
Mechanical 25
Signal connections 25
68-pin SCSI connector (P1) 26
Standoff locations 28

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