Measurement-computing USB-2527 Instrukcja Użytkownika Pobierz pdf (Strona 23)

USB-2527 User's Guide Functional Details

SCSI - 68 pin (P5) connector

The 68-pin SCSI connector includes pins for the following:

 16 single-ended/eight differential analog inputs

 Four analog outputs

 24 digital I/O

 Four counter inputs

 Two timer outputs

 Input scan pacer clock I/O

 Output scan pacer clock I/O

 TTL trigger

 self calibration

 +5 VDC

 analog commons

 digital commons

40-pin headers (J5, J6, J7, J8)

Four 40-pin headers (J5 through J8) provide alternative connections to the signals of the SCSI connector. You

can get a female connector for each header by connecting a C40FF-x cable (40-pin header to female 40-pin

header) to each header.

9-slot screw terminal (TB7)

You can use the on-board screw terminal connector (TB7) to connect up to four TC inputs. TB7 uses the

following analog channels to obtain its four differential channels:

 TC CH0: CH 0 (+); CH 8 (-)

 TC CH1: CH 1 (+); CH 9 (-)

 TC CH2: CH 2 (+); CH 10 (-)

 TC CH3: CH 3 (+); CH 11 (-)

When using the thermocouple channels, do not connect signals to the associated channels on the SCSI

connector or J5.

External power connector

Although the USB-2527 is powered by a USB port on a host PC, an external power connector is available when

the host PC’s USB port cannot supply adequate power, or if you prefer to use a separate power source.

Connect the optional PS-9V1AEPS-2500 power supply to the external power supply connector. This power

supply plugs into a standard 120 VAC outlet and supplies 9 VDC, 1 A power to the USB-2527.

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