10.1 External Input/Output Connector and Signals
179
10
• Only the RM3545-02 can be used for multiplexer-related control.
• The 0ADJ signal should be asserted (ON) for at least 10 ms.
• The connector's frame is connected to the instrument's rear panel (metal portions) as well
as the power inlet's protective ground terminal.
When switching the panel load or multiplexer channel using a command or key operation,
fix pins 4 to 6 and 22 to 24 to on or off.
(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.
After TRIG signal input, statistical calculations for the most recently updated
measured value (p.111) and data memory (p.233) are performed. Trigger
input can also be performed using the ENTER (trigger) key or the
∗TRG com-
mand.
p.208
p.84
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.68
PRINT
Asserting the PRINT signal prints the current measured value.
p.240
CAL
When the CAL signal is changed from off to on while using the manual self-
calibration setting, self-calibration will start at that edge. The signal will be
disabled when using auto self-calibration.
The time required for self calibration is approximately 400 ms.
If asserted during measurement, executes after the end of measurement.
p.92
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