Wayne Kerr AP10030, User & Service Manual

Page: 31 / 70

Wayne Kerr AP 1kW Power Supplies • Issue 2 31
6.6. Current Monitor (Imon)
The current monitor (terminal 2) output provides a signal which is the amplified voltage
developed across the current sense resistors. This signal is used for parallel operation but
can also be used to monitor the output current. The signal varies from 0 to 5 volts for
zero to full output current and is referenced to negative sense (terminals 9 or 10). The
voltmeter should be connected between terminals Imon and -S. The output impedance at
terminal Imon is 5k
Ω
.
6.7. Inhibit Terminal
The ‘INHIB’ terminal (output inhibit) is an extra facility which can be used to shut down
the output of the power supply when remote programming. Unlike the front panel ‘output
enable’ switch, this inhibit function cannot be used for resetting the overvoltage limit or
overtemperature trip. A positive voltage, in the range of approximately 2 to 60V, applied
to the ‘inhib’ terminal with respect to the -S terminal will shut down the output. The
input impedance at the ‘inhib’ terminal (terminal 1) is 10k
Ω .