Nautel XR12, Installation Manual

Page: 63 / 92

XR12 Installation Manual Control and monitoring
Issue 3.0 2009-07-15 Page 9-9
• TB1-14 (-):
EXCITER A
terminal. Causes a changeover to select exciter A as the main exciter.
Setting is saved in current preset. Provide an active pulse to select this exciter.
• TB1-16 (-):
EXCITER B
terminal. Causes a changeover to select exciter B as the main exciter.
Setting is saved in current preset. Provide an active pulse to select this exciter.
• TB1-10 (-):
POWER INCREASE
terminal. Increases the power level of the current preset.
Send an active pulse to increase the power slightly, or send a signal of greater duration to
continue increasing the power.
• TB1-12 (-):
POWER DECREASE
terminal. Decreases the power level of the current preset.
Send an active pulse to decrease the power slightly, or send a signal of greater duration to
continue decreasing the power.
Remote status and alarm indications
Outputs that indicate the status of operator controlled circuits are available on connectors J2 and J3
on the remote interface PWB. A switching device for each alarm output provides current-sink-to-
ground when a logic true condition exists.
The switching circuit provides an open collector for a logic false condition and has no influence on
the external monitoring circuit.
The following outputs are available:
Note: All outputs are active low.
• J3-18: Exciter Changeover . See “Auto changeover” on page 9-3 .
• J2-24: Preset Scheduler On Status .
• J3-21: Auto Exciter Status . Indicates if the current preset allows auto exciter changeover in the
event of failures. (Set from the GUI only.)
• J3-20: Memory Battery Alarm . See “Low backup battery” on page 9-5 .
• J3-19: RF Overcurrent Alarm . See “High RF current” on page 9-2 .
• J2-23: Exciter B Status . Indicates which exciter is presently active.
• J3-15: LVPS Fail . See “LVPS fault” on page 9-2 .
• J3-14: Exciter Fail .