Measurement Computing USB-1602HS-2AO - Manual (Page 15)

15
Chapter 3
Functional Details
Front panel
Figure 4. USB-1602HS-2AO front panel
BNC connectors
The USB-1602HS-2AO has four BNC connectors that provide connections for the following signals:
 Two single-ended analog inputs
 External digital trigger input
 External pacer clock input
These signals are also available on the 68-pin SCSI connector.
Status LEDs
The POWER LED lights up after the device is enumerated by the system. The ACTIVE LED lights up when the
USB-1602HS-2AO is transmitting or receiving data.
Rear panel
Figure 5. USB-1602HS-2AO rear panel
SCSI connector
The 68-pin SCSI connector provides connections for all I/O signals except for analog input: Refer to page 12
for the connector pin out.
 Two analog outputs (DAC0 and DAC1)
 16 digital inputs (DIN1 to DIN15)
 16 digital outputs (DOUT1 to DOUT15)
 Four counters (CTR0 to CTR3). Two counters may be gated.
 Three quadrature detectors (CTR4 A, B, and Z to CTR6 A, B, and Z)
 Two timer/pulse outputs (TMR/PWM0 to TMR/PWM1)
 Digital trigger input (DIG TRIG)
 Input pacer clock (XAPCR)
 Output pacer clock (XDPCR)
 Analog ground (AGND)
 Digital ground (DGND)
 Calibration (VCAL)
 +5V PWR