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Installation and Configuration
2–24 TM-XR9B-01XN
Additional User Options and Settings
You can customize remote operation settings for OVP (over voltage
protection) control and TTL shutdown by changing jumper positions on
the Ethernet/RS-232 Interface card. Refer to the operating manual for
information on how to use over voltage protection and TTL shutdown.
OVP Selection
Over voltage protection (OVP) on the Ethernet/RS-232 Interface is set at
the factory for remote software operation. When operating the power
supply in remote mode, you control the OVP trip level using the OVSET
software command. If you return the power supply to local operation by
using the REN software command or the front panel LOCAL switch,
control of the OVP trip level changes from software control to the front
panel OVP potentiometer. The default OVP trip level is set as 110% of the
power supply's rated output voltage. See Table 2-10 on page 2–21 for a
complete list of remote power ON default settings.
You can isolate the location of OVP control by changing the positions of
the Local OVP Control jumper J65 and the Remote OVP Control jumper
J103, both on the Ethernet/RS-232 Interface PCB. The default jumper
settings allow control of OVP to depend on the operating state of the
power supply. By physically changing the jumper settings, you can isolate
the location of OVP control to software control only or front panel control
only. Table 2-12, “OVP Control Mode Selection” on page 2–24 shows a
table of jumper settings and OVP programming selection. Refer to Figure
2-3 on page 2–6 for the location of the jumpers on the Ethernet/RS-232
Interface PCB. You will need to remove the cover to change any jumpers.
See “Changing Internal Jumpers” on page 2–8.
Table 2-12
OVP Control Mode Selection
Closed (default) Closed (default) Software or Front Panel OVP control
(dependent on the power supply operating
state)
Closed Open Software OVP control only
Open Closed Front Panel OVP control only
Open Open Front Panel OVP control only
TM-XR9B-01XN.book Page 24 Monday, April 19, 2004 9:00 AM