8.1 External Input/Output Connector and Signals
93
8
(1) Isolated power supply
(2) Input Signals
Signal Descriptions
Pin Signal name
NPN/PNP switch setting
NPN PNP
8ISO_5V
Isolated power
supply +5 V
Isolated power
supply -5 V
9, 27 ISO_COM Isolated common signal ground
TRIG
The TRIG signal operates at either the ON or OFF edge. ON or OFF edge
triggering can be selected on the EXT I/O setting screen (default: ON edge).
• When external triggering (EXT) is enabled
The TRIG signal causes one measurement to be performed.
• When internal triggering (INT) is enabled
The TRIG signal does not trigger measurement.
A wait is necessary to allow the measured value to stabilize after switching
ranges or loading a panel. The wait time varies with the measurement target.
Trigger input can also be performed using the ENTER (trigger) key or the
∗TRG command.
p.110
0ADJ
When the 0ADJ signal is switched from OFF to ON, one zero-adjustment
operation will be performed at the signal edge.
To avoid malfunction, this signal should be asserted (ON) for at least 10 ms.
The ERR signal turns ON when zero-adjustment fails.
p.44
PRINT
Asserting the PRINT signal prints the current measured value.
p.140
KEY_LOCK
While the KEY_LOCK signal is held ON, all front panel keys (except standby
key and ENTER (trigger) key) are disabled (key unlock and remote control
cancellation operations are also disabled).
p.78
BCD_LOW
When used with the BCD output setting, turning the BCD_LOW signal OFF
causes the higher digits to be output. Turn the BCD_LOW signal ON causes
the lower digits and range information to be output.
p.95
LOAD0 to
LOAD3
LOAD0 is the LSB, while LOAD3 is the MSB. For more information, see "(4)
Signal correspondence chart"(p.96).
If any of the LOAD signals changes and then there are no changes for an
interval of 10 ms, the panel load operation will be performed. Do not change
the LOAD0 to 3 signals until load operation completes.
LOAD signals are also enabled when controlling the instrument via communi-
cations (remotely). All key operation is disabled when the LOAD signal for a
valid panel number is ON.
When loading panels using commands or key operation, fix pins 4 and 5 as
well as 22 and 23 to either ON or OFF.
p.96
IN0, IN1
The input state can be monitored by using the :IO:INPut? command,
using these pins as general-purpose input pins.
See: Communications Command Instruction Manual on the included appli-
cation disc.
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