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S&C Instruction Sheet 659-520
Enclosure
The enclosure houses the PCS. The weatherproof, tamper-resistant NEMA 4 enclosure
helps protect the system from environmental factors and unauthorized interference.
Access to the system components shall be by means of a door at the front of the enclo-
sure. Vents for air flow are located on the back. See Figure 1.
Figure 1. Front and rear view of the PCS enclosure.
LCD Screen
A four-line, 40 character liquid-crystal display shall be mounted on the control panel,
protected by a clear plastic window. The display shall indicate status information such
as voltages (ac), currents (ac), power (ac), vars (ac), battery voltage (dc), inverter state,
operating mode, and active alarms. See Figure 2.
LCD
Figure 2. Location of the LCD screen.
Components and Controls
