External Trigger Connections; External On/Off Control Connection - ITech IT8700 Series User Manual

3.4.1 External trigger connections

There're five kinds of trigger mode:

front panel TRIG trigger mode

rear panel trigger mode

BUS trigger mode

Timer trigger mode

trigger HOLD mode
Front panel TRIG trigger mode
When select front panel trigger mode, first set the trigger source as MANUAL,
press
Rear panel trigger mode
When select rear panel trigger mode, first set the trigger source as EXTERNAL,
trigger signal input from the 1
When select external trigger mode, the 1
pulse is effective), e.g. refer to the below connection figure:
The figure just show one way to produce trigger signal. When press the button,
it produce a trigger to change setting value (voltage, current, resistance, etc.),
e.g. switch in transient mode, or create pulse in dynamic pulse mode. At the
same time, it can output trigger signal in pin 2.
BUS trigger mode
When select bus trigger mode, first set the trigger source as BUS, connect the
electronic load by GPIB or USB or GPIB communication interface, then if get
the *TRG command, the load will produce a trigger signal.
Timer trigger mode
When select timer trigger mode, first set the trigger source as TIMER, set the
TIGGER TIMER's time, the load will produce a signal from time to time.
Trigger HOLD mode
When select hold trigger mode, first set trigger source as HOLD, the load will
produce signal when get the TREG: IMM command.

3.4.2 External ON/OFF control connection

ON/OFF IN is used to control the multi-channel to take load or unload
synchronously. When ON/OFF IN pin receives a low pulse, ON/OFF state of
load will reverse. If SYNC ON SET of a specific channel is set ON, then you can
use figure 3-6 connection to control its ON/OFF state.
ON/OFF OUT indicates ON/OFF state of multi channels electronic load. If
SYNC ON SET of any specific channel is set on, and the channel's input state
Trig Trig
to start panel trigger mode.
NOTE
Pin 2 will output corresponding trigger signal whatever trigger mode you choose.
3 1 1 1
1
Figure 3-6
Copyright © Itech Electronic Co., Ltd.
st
pin of 8-pin terminal on the rear panel.
st th
and 8 send out trigger signal (low
8 8
Panel function introduction
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