Liquistation CSF34 Electrical connection
Endress+Hauser 21
5 Electrical connection
5.1 Connecting the sampler
L
WARNING
Device is live!
Incorrect connection may result in injury or death!
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The electrical connection may be performed only by an electrical technician.
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The electrical technician must have read and understood these Operating Instructions and
must follow the instructions contained therein.
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Prior to commencing connection work, ensure that no voltage is present on any cable.
NOTICE
The device does not have a power switch
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A fuse with a maximum rating of 10 A must be provided by the customer. Observe the local
regulations for installation.
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Use a HBC fuse with 10 A, 250 V AC for samplers with CSA approval.
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The circuit breaker must be a switch or power switch, and you must label it as the circuit
breaker for the device.
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The ground connection must be made before all other connections. Danger may arise if the
protective ground is disconnected.
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A circuit breaker must be located near the device.
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For 24V versions, the power supply at the voltage source must be isolated from cables
carrying low voltage (110/230V AC) by double or reinforced insulation.
Operation with non-stationary power cable connection to sampler (optional)
5.1.1 Laying the cable
• Lay the cables so that they are protected behind the rear panel of the device.
• Cable glands (up to 8 depending on the version) are available for the cable entry.
• The cable length from the foundation to the terminal connection is approx. 1.7 m (5.6 ft).
•
5.1.2 Cable types
• Power supply: e.g. NYY-J; 3-wire; min. 2.5 mm
2
• Analog, signal and transmission cables: e.g. LiYY 10 x 0.34 mm
2
The terminal connection is located under an additional protective cover in the upper rear
section of the device. Prior to commissioning, therefore, remove the rear panel of the
device to connect the power supply. The terminal cross-section must be at least 2.5 mm
2
for devices with 24V power supply. With 24V power supply, a current of up to 10A can
flow. For this reason pay attention to the voltage drop on the supply line. The voltage at
the device terminals must be within the specified range (→ 37).
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