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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
10.3.4 Power Supply Module
The Power Supply Module consists of several subassemblies described in Table 10-7 below.
Table 10-7: 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 Figure 10-4. The +5 is used for operating the CPU. The
±
15 is used in several locations for running op-amps 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 distributes AC and DC power as needed.
Connector J2 programs the power transformers to take 115, 220, or
240 VAC inputs
Power Transformers There are potentially 2 input power transformers in the instrument.
The multitap transformer T1 is in every M100AH 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.
10-41