KEPCO KLR Series User Manual - Manual (Page 50)

3-10
KLR091313
grammed to FAULT mode (see PAR. 3.2.17.1), the N.O. and N.C. contacts of the relay provide
status flags via the Analog I/O port connector. The maximum values are 1.2 x E
O
max for over-
voltage protection, and 1.2 x I
O
max for overcurrent protection.
A built-in feature prevents the unit from encroaching upon the above margins for OVP and OCP.
For example, if OVP and OCP are set to 12V and 72A, respectively, programming of the output
is automatically limited to 10V and 60A.
NOTE: When a limit model is defined (PAR. 3.2.9), OVP and OCP limits are automatically set
20% and 20%, respectively, above the maximum programmable values established by
the limit model. If OVP or OCP limits are lowered by the user, valid output voltage and
current settings will be lower than the limit model limits because values within the 20%
guard band of OVP or OCP are prohibited.
The OVP and/or OCP limits can be changed as follows:
1. Using a thin tool (e.g., end of paper clip), press and hold the PROTECT switch. The output is
switched off, setting voltage to zero Volts, and current to a minimal value, and the status dis-
play shows PROT. The DC VOLTS and DC AMPERES displays show the corresponding
overvoltage and overcurrent protection setpoints while the PROTECT switch is held in.
2. To change the values, operate the corresponding adjustment control while holding the PRO-
TECT switch in. When the PROTECT switch is released, the protection values showing in
the DC VOLTS and DC AMPERES displays are entered as the new protection values.
3.2.12 CHANGING GPIB ADDRESS
KLR supports GPIB addresses from 1 to 30; the factory default GPIB address is 6. To change
the address from the front panel proceed as follows:
1. If the status display shows SET, tap either the CURRENT or VOLTAGE controls to take the
unit out of setpoint mode (status display goes from SET to blank)
2. Using a thin tool (e.g., a paper clip), press the FUNCTION switch once, then rotate either the
CURRENT or VOLTAGE control until the display reads ADDR; the active GPIB address is
visible in the DC AMPERES display. To change the address, proceed to step 3.
3. Tap the DC OUTPUT switch. The GPIB address visible in the DC AMPERES display begins
blinking.
4. Rotate the CURRENT control to change the GPIB address, then tap the DC OUTPUT switch
to accept the displayed GPIB address. The display briefly reads DONE, then returns to ADDR.
5. Rotate the VOLTAGE control until display reads EXIT, then tap the DC OUTPUT switch to
exit
3.2.13 CHANGING RS 232 BAUD RATE [STANDARD MODELS ONLY]
The factory default RS 232 baud rate is 38400. To change the baud rate from the front panel
proceed as follows:
1. If the status display shows SET, tap either the CURRENT or VOLTAGE controls to take the
unit out of setpoint mode (status display goes from SET to blank)