5-28 Application Operation PLZ-U
Turning the load on/off
You can turn the load on/off on each channel. Apply an external signal across pins 1
and 4 of the CH CONT connector. For turning the load on, the change in the exter-
nal voltage (edge) is detected. For turning the load off, the external signal level is
detected.
Use the polarity of the load-on external control in the configuration settings (section
5.9) to select low active or high active.
• See Table 5-5 for the input signal conditions.
When the load is turned on externally, the load can be turned off from the panel.
However, when the load is turned off externally, the load cannot be turned on from
the panel, GPIB, or RS-232C.
• If you set the polarity of the load-on external control to low active and open the
signal input terminal, you will only be able to turn on the load using the CH
CONT signal.
• The external signal input is TTL level. Open-circuit voltage is approxi-
mately +5 V. Be sure to return the current to CH CONT pin 1.
Current monitor output
You can monitor the input current of the PLZ-U. The monitor signal is output across
pins 2 and 1 (pin 1 is common) of the CH CONT connector. Full scale of the current
range corresponds to 10 V output.
• Pin 1 of the CH CONT connector is connected to the negative load input
terminal. Do not allow pin 1 to touch other pins.
Fig. 5-20 Current monitor output
NOTE
CAUTION
CAUTION
0
Input current Rated value of
the range
10 V
Current monitor output
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