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TPCMQ48 SERIES
INSTALLATION & OPERATING MANUAL
Manual No. tpcmq48-4
tpcmq48-man-rev4-0116.indd
8.1
FRONT PANEL INDICATORS
The two green front panel indicators together indicate the status of the power module.
LED
Status
Condition
INPUT POWER GOOD
ON
DC input within limits
OFF
DC input outside limits
OUTPUT POWER GOOD
ON
DC Output is on and within limits
OFF
DC Output is off
9.0 DESCRIPTION OF OPERATION
9.1
Power Outputs
The power output terminals provide the main output power of the unit. The output voltage
is adjustable by means of a potentiometer accessible through the top cover of by using the
analogue remote adjust pin. Note that all of the power pins must be used for correct operation
and to avoid overheating of the connector. The power output terminals are isolated from
chassis ground to a maximum voltage of 100VDC.
9.2
I/O Signals
The # symbol in the following text is used to denote an active low signal.
9.2.1
Sense +Ve, Sense –Ve
The sense signals are intended to be connected to the point of load so that voltage drop in
the load cables can be compensated for. The amount of compensation is limited to 0.25V
per wire. Care must be taken when using the sense signals as if the power connections to
the load are interrupted by disconnection or circuit breaker with the senses still connected
then damage may occur to the power supply and sense wiring. Sense +Ve and Sense -Ve
are internally connected to the module output power terminals using 10 Ohm resistors so
that if the senses are not connected the output will still be regulated.
Sense -Ve is also used as the return path for the other I/O signals.
9.2.2
Current Share
This signal is connected between all modules required to share a load. This signal is capable
of driving up to 16 modules. The return path for this signal is Sense -Ve and that signal
should also be connected between all modules for correct sharing operation.
9.2.3
Current Monitor
This analogue signal provides a voltage proportional to the output load current of the module.
The full scale voltage for nominal full load current is 3.0V.
9.2.4
Standby Return
This is the return path for the +5V standby supply.
