40 PCR-M
Chapter 3 Operation
3.5 Turning the OUTPUT On/Off
The OUTPUT turns on/off each time the OUTPUT key is pressed.
• OUTPUT on
The LED above on the left of the OUTPUT key illuminates.
The voltage and frequency according to the specified output mode and voltage
range are output.
• OUTPUT off
The LED above on the left of the OUTPUT key turns off.
The OUTPUT is always off when the POWER switch is turned on.
If a protection function trips, the OUTPUT is turned off. However, if the current
limit operation is set to LIMIT CONTROL and the overload protection function
(current limit) trips, the OUTPUT is not turned off.
• To prevent the possibility of electric shock, do not touch the
OUTPUT terminal block and OUTPUT outlet.
• If a capacitor, battery, or a similar device is connected as a load in
DC mode, voltage remains at the section connected to the OUTPUT
terminal block or OUTPUT outlet even when the OUTPUT is off until
the load energy is discharged. The discharge time of the internal
capacitor when no load is connected is approximately 0.1 seconds.
To prevent the possibility of electric shock, do not touch the
OUTPUT terminal block and OUTPUT outlet.
• When the OUTPUT is turned on, several volts of undershoot or overshoot
may appear on the order of ten microseconds.
■ Principle of OUTPUT on/off
The PCR-M does not cut off output from the internal circuits mechanically using
switches and relays, but rather increases output impedance electrically to turn the
output off. Therefore, the output can be turned on/off without chattering. When the
OUTPUT is off, the output is in high-impedance condition.
Table 3-5 The resistance in the high-impedance condition
WARNING
CAUTION
PCR500M PCR1000M PCR2000M
135 V range approx. 40 kΩ approx. 20 kΩ approx. 10 kΩ
270 V range approx. 80 kΩ approx. 40 kΩ approx. 20 kΩ
To Next Page
Loading...
