Hioki LR8431, Instruction Manual

Page: 137 / 204

9.1 Connecting to the External Control Terminals
129
3
9
Chapt
er
9 Externa
l Control
The external control terminals on the Memory HiLogger support trigger signal input
and output.
External

Control
Chapter 9
ALARM (Output)
A signal is output whenever the alarm
criteria are satisfied (p. 134).
EXT.TRIG (External trigger input)
Input external signals (p. 131).
Top View
GND
(common with instrument ground)
TRIG.OUT (Trigger output)
Output a signal when a trigger
event occurs (p. 132).
9.1 Connecting to the External Control

Terminals
To avoid electrical hazards and damage to the instrument, do
not apply voltage exceeding the rated maximum to the exter-
nal control terminals.
I/O terminals Maximum input voltage
Input EXT.TRIG 0 to 7 V DC
Output
TRIG.OUT
30 V DC
5 mA max, 200 mW max
ALARM
To prevent electric shock accidents and damage to the equip-
ment, always observe the following precautions when making
connections to external terminal blocks and external connec-
tors.
• Before making connections, turn off the power on the
instrument and the equipment to connect.
• Do not exceed the specified signal levels for signals sup-
plied to external terminal blocks.
• Ensure that devices and systems to be connected to the
external control terminals are properly isolated.