Hach CD500 Bedienungsanleitung Seite 9

Electrical shock and/or fire hazards.
Install the instrument in accordance with local, regional and national regulations.
Externally connected equipment must have an applicable country safety standard assessment.
A local disconnect is needed for a conduit installation.
Make sure to identify the local disconnect clearly for the conduit installation.
For a cord-connected instrument, make sure to install the instrument so that the cord can be
disconnected easily from the supply socket.
Electrical connectors and fittings
Figure 3 shows the electrical connectors and fittings on the instrument. To keep the environmental
rating of the enclosure, make sure that there is a plug in the strain relief fittings that are not used and
a connector cap on the unused connectors.
Figure 3 Electrical connectors and fittings
1 Ethernet connector
2 Compressed air input
3 USB connector
4 Sensor connectors (4x)
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.
W A R N I N G
5 Strain relief fitting for relay
6 Power cord (or conduit hub) for AC power supply
7 Strain relief fittings for analog outputs, DC power
supply and external trigger
8 Compressed air output
N O T I C E
English 9