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3.3.
Electrical Layout
3.3.1. Power distribution panel
The AC line power from the main power switch wires into the power distribution panel is
shown below. This panel provides grounded receptacles for power cords wired to the
various subassemblies and mechanical pumps in the ACM 150 monitor. If DC power is
required, each subassembly has its power supply. Power to any subassembly can be
disconnected by unplugging it from the power distribution panel. The power distribution
panel is divided into two fused circuits.
• One 115/230 Vac switched receptacle J20 for the Primary Pump. The power is
generally on and is switched off when the vacuum falls below preset levels.
• One 115/230 Vac switched receptacle J21 for the Secondary Pump. The power is
usually switched off and is switched on when the Primary Pump fails. A fault message
is activated: “ACTIVATING SECONDARY PUMP.”
• Twelve unswitched 115/230 Vac receptacles for all the powered subassemblies.
Figure 19. Power Distribution Panel
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