Hioki DM7275 Series - X84; Signal Functions

129
Connections (Instrument and Control Device)
The connector frame is connected to the instrument’s rear panel (metal portion) as well as the
power supply inlet’s protective ground terminal.
When loading panel data by means of a command or touch panel operation, x pins 4, 5, 22, 23,
and 24 to ON or OFF (so that they are all either open or all shorted).
For more information about checking EXT I/O input and output, see “11.5 Input Test/Output Test”
(p. 138).
Signal functions
(1) Isolatedpowersupplyoutput
Pin Signal
NPN/PNPswitchsetting
NPN PNP
8 ISO_5V Isolated power supply +5 V Isolated power supply -5 V
9, 27 ISO_COM Isolated power supply common Isolated power supply common
(2) Input signals
Signal Description For more information
TRIG
• The instrument operates at the TRIG signal’s ON edge.
• Operation varies depending on the trigger source.
When the trigger source is EXTERNAL: Measurement is
performed the set number of times.
When the trigger source is INTERNAL: The TRIG signal is
ignored.
• Measurement must be delayed (by the delay time) after switching
ranges or loading panel data in order for measured values to
stabilize. The delay time varies with the measurement target.
“3 Starting
Measurement”
(p. 37)
• When automatic output is set to ON, the measured value being
held internally will be output immediately after TRIG signal input.
“9 Data Output
Settings” (p. 113)
PRINT
By turning on the PRINT signal, it is possible to print the measured
value and judgment result that are current as of the signal’s edge.
“12 Printing”
(p. 147).
KEY_LOCK When the KEY_LOCK signal is on, all instrument key operations
and touch panel operations (except operation to cancel the key-
lock state) are ignored.
“7 Key Lock
(Disabling Instrument
Operation)” (p. 87)
LOAD0to
LOAD4
• Inputting the LOAD signal corresponding to the desired panel
number for 10 ms will cause that panel to be loaded. Do not
change the LOAD signal until the load or switching operation is
complete. LOAD0 is the LSB, while LOAD4 is the MSB.
• The TRIG signal is ignored while panel load operation is being
performed.
• The LOAD signal is valid even when the instrument is being
controlled using communications commands (i.e., when the
instrument is in the remote state).
• All key operations and touch panel operations are ignored while
the LOAD signal for a panel number for which settings have been
saved is on.
• When loading panel data by means of a command or touch panel
operation, x pins 4, 5, 22, 23, and 24 to ON or OFF (so that they
are all either open or all shorted).
• “(4) Signal table”
(p. 132)
• “5.2 Loading
Measurement
Conditions (Panel
Load Function)”
(p. 64)
IN0,
IN1
These pins can be used as general-purpose input pins to monitor
the status of input with the
:IO:INPut?
command.
Communication
Command Manual
on the included
application disc.
0
Input signals are ignored while the Measurement screen is not being displayed and while errors
and other messages are being displayed.
External Control (EXT I/O)
11
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