QuadTech 1865, Инструкция по эксплуатации, Страница: 59 / 87

Operation Page 59 of 87
Table 2-3: I/O Interface Connections
Signal Name Pin Number Function
Input*
START 16 Initiates Measurement Cycle
Outputs**
Bin 0 1 Fail, Measured Value below preset limit
Bin 1 19 Pass, Measured Value above preset limit
GND 11, 15, 33 System Ground
IGND 5, 10, 23, 28 Isolated Ground
EOT 29 End of Test, Bin signal outputs valid
TEST ACTIVE 30 Measurement in process
VCC 12, 32
+5V (Source Z: 100
Ω
pin12, 10
Ω
pin 32)
Isolated Connections***
START HI (isolated) 34 High Input from external source
START LO (isolated) 35 Low Input from external source
Interlock
INTERLOCK 31 Operator Safety feature primarily for use
with external fixtures (i.e. operation of the
1865 instrument can be disabled until the
cover of the fixture is closed).
To enable the interlock function, pin 31
must be connected to ground or controlled
electrically with a logic low. This can be
converted to an isolated active low input by
removing jumper JP4 on the I/O PCB. The
interlock connector supplied with the unit
makes this connection (pin 31 to 28) when
plugged into the rear panel I/O connector
(Figure 2-32).
18 1
36 19
Figure 2-32: Rear Panel I/O Connector
WARNING
Do not apply an external source in excess of 5 volts with jumpers JP2, JP3 or JP4 in
place, otherwise the instrument can be damaged. These jumpers are discussed below and
on some instruments physically located under the stack on the I/O board.