10/6/10 888-2629-200 1-15
WARNING: Disconnect primary power prior to servicing.
Section 1 Introduction
Maxiva ULX COFDM Series
1.2.8.1 Cooling System Control Panel
The cooling system control panel controls the operation of the pump module/heat
exchanger, and sends fault and status information to the TCU. The cooling system
control connects to the RF Detector/Pump Control/Interlocks card in the TCU for
monitoring and control.
NOTE:
Some early versions of the pump module were designed for indoor use only. The
current pump module is designed for indoor or outdoor use.
The pump control signals are described below:
+12 Vdc - Voltage supplied by Pump Control Unit.
PUMP_INTLK - Output, active high. When high, the transmitter’s RF output is muted
and the pumps are forced to OFF regardless of the LOCAL/
REMOTE setting in the pump cooling control panel. If this interlock
is active, the pumps can’t be turned ON (even locally). This interlock
is driven by the transmitter or PA cabinet leak detector. If a leak is
detected, this interlock goes to high.
PUMP RUN - Output, active high to turn on selected pump.
SWITCH PUMP - Output, pulsed active high to switch between Pump A and Pump B.
PUMP A SELECTED - Input, connect to open drain or relay contacts. Active when
input is LOW.
PUMP B SELECTED - Input, connect to open drain or relay contacts. Active LOW.
LOCAL STATUS - Input, connect to open drain or relay contacts. Remote = LOW,
Local =HIGH
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