8.1 Outline of External I/O
105
8
Function of
the signal line
Signal line name I/O Function
READY
OUT
LOW level in the READY state
L-FAIL
OUT LOW level in the FAIL state at LOWER (minimum
value)
U-FAIL
OUT LOW level in the FAIL state at UPPER (maximum
value)
PASS
OUT LOW level in the PASS state
TEST
OUT LOW level in the TEST state
H.V.ON
OUT LOW level when a voltage is generated in the out-
put terminal
EXT-E
IN At LOW level, the external I/O input signal is
active. INT.LOCK
or STOP remains active regard-
less of this signal. Changing this signal during
testing will forcibly terminate the test.
START
IN LOW level is equivalent to pressing the instrument
START key and provides the same functions.
STOP
IN LOW level is equivalent to pressing the unit STOP
key and provides the same functions. This signal
is valid regardless of EXT-E
status.
INT.LOCK
IN Inter-lock function terminal. This signal is always
active regardless of the status of the EXT-E
termi-
nal. When connected to ISO.GND, this terminal
cancels the Interlock function, enabling the unit to
function properly. When there is no connection,
"Err0" is displayed and all keys are invalid.
To activate the Inter-lock function, set the optional
Inter-lock function to "1: ON". Use this terminal for
a protective device against electric shock that
uses an area sensor or the like.
See "8.3 Inter-lock Function" (p. 111)
W-MODE
OUT LOW level when performing a withstand-voltage
test in the withstand-voltage test screen.
I-MODE
OUT LOW level when performing an insulation-resis-
tance test in the insulation-resistance test screen.
W-FAIL
OUT LOW level in FAIL state during a withstand-volt-
age test.
I-FAIL
OUT LOW level in FAIL state during an insulation-resis-
tance test.
MEM-E
IN At LOW level, the memory selection terminal
(MEM-0 to 4) is active.
MEM-0 to MEM-3 IN Selection terminal for saved test conditions.
MODE0, MODE1 OUT Indicates the current test mode.
ISO.COM
IN Common terminal insulated from GND found
inside the instrument. Used to temporarily activate
the external I/O function.
ISO.DCV
OUT Outputs a power voltage of 15 V (100 mA), iso-
lated from the internal power supply. Used to tem-
porarily activate the external I/O function.
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