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Teledyne API Model 200A NO
X
Analyzer Instruction Manual, 02246, Rev. G, DCN 5247
Table 9-9-13: Power Supply Module Subassemblies
Module Description
Linear Power Supply
Board
The linear power supply board takes multiple voltage inputs from the
power transformer and produces +5, +15, -15, +12 VDC outputs. The
outputs are routed to two external connectors, P2 and P3. See Table 9-
9-14. The +5 is used for operating the CPU. The ± 15 is used in
several locations for running op-am
ps and IC's
. The +12 is used for
operating fans and valves.
Switching Power Supply The switching power supply supplies +15 VDC at 4 A to the PMT
cooler control on the Sensor Module. The output is made available
through J10 on the Switch Board. There is a load resistor on the
Switch Board to keep the output stable when little current is required
from the supply.
Switch Board The Switch Board has many different functions. It takes logic signals
from the V/F board and uses them to switch 4-115 VAC and
4-12 VDC loads. The board also contains the instrument central
grounding tie point. It routes unswitched AC and DC power as needed.
Connector J2 programs the power transformers to take 115, 220, and
240 VAC inputs.
Power Transformers There are potentially 2 input power transformers in the instrument. The
multitap transformer T1 is in every M200A and supplies input power
for the Linear Power Supply board described above. A second
transformer T2 is added if 220 or 240 VAC input is required. Input
power selection is done via a programming connector P2 which
provides the proper connections for either foreign or domestic power.
Circuit Breaker/Power
Switch
The front panel contains a combination circuit breaker - input power
switch. It is connected to the PSM through J6 on the Switch Board. If
an overload is detected the switch goes to the OFF position. Switching
the power back on resets the breaker also.
9-50
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