ST2883 Series Operation Manual Chapter 9 Handler interface
9-3
The timing diagram for handler interface is displayed in above figure, T1 is the trigger pulse width and the
minimum pulse width is 1 us. T2 is the delay time, after the foregoing measurement completed to next trigger
signal; its minimum pulse width is 0 us. /PASS and /FAIL signals are asserted after the measurement completed, till
next trigger. The request of the /STOP pulse signal is the same as /START pulse signal.
9.2 Electrical characteristics
9.2.1 DC isolated output
Each DC output (pins 2 through 5) is the collector output of the built-in pull-up resistor and isolated by an
opto-coupler. The output voltage of each line is set by a pull-up resistor on the handler interface board. The pull-up
resistors can be connected to the internally supplied voltage (+5V), or to an externally applied voltage (EXV: +5V
to +24V) by setting jumpers. Table 9-1 shows the electrical characteristics of the DC isolated outputs.
Table
9-1 DC
isolated
output
electrical characteristics
Figure 9-1 Simplified diagram of the output signals
Output
signal
Voltage output rating
Maximum
current
Circuit common
Low High
/EOC
BUSY
/PASS
/FAIL
≤
0.5V +5V
～
+24V 6mA
Internal pull-up voltage:
ST2883 series circuit common
GND
External voltage (EXV):
EXGND
