Tonghui TH2840 Series - Electrical Feature

204
panel function keys and touch screen of
TH2840 are locked and no longer work.
27
28
EXT.DCV1
Input
The external DC voltage 1:
the pull-up DC power provider pin for
optoelectronic coupling signal
(/BIN-/BIN10, /PASS, /FAIL).
29
/ALARM
Output
When circuit is interrupted, /ALARM is
effective.
30
/INDEX
Output
When the analog test is finished and the
UNKNOWN terminal can be connected to
another DUT, /INDEX is effective. But the
comparison signal is effective until /EOM is
effective.
31
/EOM
Output
End Of Measurement：when the test data and
the compared result are effective, this signal
is effective.
32,33
COM2
---
The reference ground for external power
EXTV2.
34,35,36
COM1
---
The reference ground for external power
EXTV1.
10.3.3 Electrical Feature
The definition of some signals in the transformer single measurement sorting function and the bin
sorting function and the list sweep sorting function are different, but the electrical properties of the
same pin number are exactly the same.
10.3.3.1 DC Isolation Output Signal
Each DC output (pins 1 to 11, 19 to 24, and 29 to 31) is isolated via an open collector optocoupler
output. The output voltage of each line is set by a pull-up resistor on the HANDLER interface board.
The pull-up resistor is connected with the internal supply voltage (+5V) or with the external supply
voltage (EXTV: +5V-24V) by jumper.
The DC isolation output signal utilizes a dedicated electrical system which is independent of the
control output signal. Therefore, the processor board has a common line for two separate circuits:
COM1 and COM2.
The electrical characteristics of the DC isolated output are divided into two types, see Table 10-10.
The output circuit configuration of the test result output signal is shown in Figure 10-3, and the
output circuit configuration of the control output signal is shown in Figure 10-4.