System-Related Functions
Copyright ©ITECH Electronic Co., Ltd.
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5.8 Trigger Function
IT7800 series has four t
rigger
source to choose:
trigger by keys (Key),
Software trigger (Software), Bus trigger (Bus) and External signal trigger
(External).
⚫
Manual: if
[Trig]
on the front panel is pressed in the valid key trigger mode,
the power supply will be triggered once.
⚫
Bus: if the bus trigger command is received by the power supply in the valid
bus trigger mode, the power supply will be triggered once.
⚫
Trigger1: if one trigger signal is connected to the Digital IO-6 of digital I/O
Interface terminal on the rear panel, the power supply will be triggered once.
⚫
Trigger2: if one trigger signal is connected to the Digital IO-7 of digital I/O
Interface terminal on the rear panel, the power supply will be triggered once.
5.9 Set Parallel Operation Mode
The IT7800 series power supply supports multiple instruments to work in parallel
mode to provide more power and current output capability. Under the parallel
mode, All features are set up from the master unit.
This chapter takes three instruments (with operation panel) as an example to
describe how to parallelize the single units and how to return from parallel mode
to single mode.
Connect the instruments
⚫
Before connecting the system bus, you must ensure that each instrument is
in single mode (Single).
⚫
Fiber optic cables cannot be flexed or folded. When the cable is too long
and needs to be arranged, gently wrap the cable in a circle and gently tie it.
⚫
Before connecting the cables, ensure that the instrument power switch is off
and the main switch of the AC power input (distribution box) is off.
⚫
Before connecting 3 single instruments to the AC distribution box, ensure
that the distribution box capacity is sufficient. Refer to the corresponding
specifications for the AC input parameters of a single instrument.
For 3U models, the same model can be connected in parallel. Taking three 3U
single instruments (with operation panel) as an example, the steps for parallel
operation are as follows.
1.
Ensure that the power switches of the three units and the main switch of the
AC power distribution box are off.
2.
Refer wiring connection diagram to connect three units.
