High-Voltage Barrier; Electrostatic Discharge (Esd) Considerations; Wiring Overview; Top And Bottom Views - Hach sc200 User Manual

Figure 6 Top and bottom views

High-voltage barrier

High-voltage wiring for the controller is located behind the high-voltage
barrier in the controller enclosure. The barrier must remain in place
except when installing modules or when a qualified installation
technician is wiring for power, alarms, outputs or relays. Do not remove
the barrier while power is applied to the controller.

Electrostatic discharge (ESD) considerations

Potential Instrument Damage. Delicate internal electronic components
can be damaged by static electricity, resulting in degraded
performance or eventual failure.
Refer to the steps in this procedure to prevent ESD damage to the
instrument:
• Touch an earth-grounded metal surface such as the chassis of an
instrument, a metal conduit or pipe to discharge static electricity from
the body.
• Avoid excessive movement. Transport static-sensitive components in
anti-static containers or packages.
• Wear a wrist strap connected by a wire to earth ground.
• Work in a static-safe area with anti-static floor pads and work bench
pads.

Wiring overview

Figure 7 shows an overview of the wiring connections inside the
controller with the high voltage barrier removed. The left side of the
figure shows the back side of the controller cover.
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