Hioki ST5540, Instruction Manual, Page: 253 / 326

9.2 Connecting to the EXT I/O Terminal
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Follow the procedure described below when connecting an EXT I/O cable connector.
9.2 Connecting to the EXT I/O Terminal
Connect an EXT I/O cable connector before turning on the instrument's power
switch. Connecting or disconnecting a cable connector after turning the instru-
ment on may cause a fault.
1.
Connect an EXT I/O cable connector to the EXT I/O ter-
minal of the main instrument.
2.
Use the tabs of the EXT I/O terminal to lock the EXT I/O
connector in place.
tabs
1
2
Terminal
name
Input/
output
Function
START Input
Sets the instrument to automatic measurement mode. When this terminal is set to
Low level, automatic measurement starts.
When LOAD0 to LOAD4 are set with this terminal set to Low level, the selected panel
number is read and measurement starts.
STOP Input
During automatic measurement with this terminal set to Low level, the measurement
ends (interrupted).
KEYLOCK Input
When this terminal is set to Low level, the key lock function is activated.
Only , and on the touch panel are effective.
LOAD0
to
LOAD4
Input
Selects the number of the panel to be loaded. When the START signal is input, the
panel of the selected number is read and measurement starts. Negative-logic binary
numbers are input to LOAD4 through LOAD0.
MSB is input to LOAD4, and LSB to LOAD0.
TEST Output
When automatic measurement starts, the terminal changes to Low level and holds the
level until all measurements are completed.
MEAS Output
During automatic measurement, this terminal outputs Low level for each measure-
ment item.
PASS Output
During automatic measurement, this terminal changes to Low level when the allow-
able value judgement for each measurement value results in PASS.
FAIL Output
During automatic measurement, this terminal changes to Low level when the allow-
able value (upper limit value) judgement for each measurement value results in FAIL.
It also changes to low level when a nointerrupted performance check or pre-check
returns a FAIL result.
LOW Output
During automatic measurement, this terminal changes to Low level when a measure-
ment value for an item drops below an allowable value (lower limit) (and LOW
appears). It also changes to low level when a nointerrupted performance check or
pre-check returns a FAIL result.
T-FAIL Output
During automatic measurement, this terminal changes to Low level when the allow-
able value judgement results in FAIL even once for any measurement item. It also
changes to low level when a nointerrupted performance check returns a FAIL result.