Interface Page 77 of 77
Table 3-2 (continued)
Parallel Interface Connections
Signal Name Pin Number Function
Inputs:
Stop 3 Stops a test and remove high voltage. This input
or STOP button must be used to resume operation
after a test fail, unless remote communication is
enabled (in which case the Stop command serves
the same function).
Start 2 Starts the test
Data0 9 Binary code 1 (LSB) that determines test number
to run (1 thru 15 single user define tests or 1 thru
9 multiple tests). Value is read when Start is
initiated. This line must be set 20msec before
start and held for 20msec after.
Data1 10 Binary code 2 to determine test number
Data2 11 Binary code 4 to determine test number
Data3 12 Binary code 8 to determine test number
Multi-Step Test 13 When asserted Data0….3 determine multiple test
number, when not asserted Data0….3 determine
single test number. This line asserted and
Data0….3 all off is invalid condition.
Interlock Enable 19 When held low the Interlock function is enabled.
Interlock 24 Used in conjunction with Interlock Enable, and
when held low will enable operation of the
instrument
Pin Configuration (Viewed from Rear Panel)
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