Gantner e.bloxx A5CR, Руководство пользователя

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e.bloxx A5-1CR
MOUNTING e.bloxx AND CONNECTING WIRES
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HB_EBLOXX-A5CR_E_V11.doc
Gantner Instruments Test & Measurement GMBH
3. MOUNTING e.bloxx AND CONNECTING WIRES
3.1. Environmental Conditions
The e.bloxx modules are protected against water and dirt according IP 20. If required by the conditions of the operating
site the modules have to be installed accordingly, e.g. in a water-resistant or water-proof case, compliant with the
regulations of electrical engineering.
For the allowed ambient temperatures for the e.bloxx A5-1CR see the Technical Specifications at the end of this
manual.
3.2. Connection Technique
The wires are connected to the modules via screw-type terminals. The captive terminal screws are part of the terminal
strips. All terminal strips are of plug-in type and can be detached from the modules.
Not more than 2 leads should be connected with one clamp. In this case both leads should have the same conductor
cross-section. For the precise clamping of stranded wire we recommend the use of wire-end ferrules.
Notice:
Connecting wires respectively the plugging-in and -out of the terminal strip is only allowed with modules in
power-off status.
In order to prevent interference with sensors, signals and modules, shielded cables have to be used for the
power supply, bus connection and signal lines.
We strongly recommend using a single screened cable each input signal. To use more signals in one cable
could generate interacting influences.
Notice:
For optimal performance the e.bloxx modules must be grounded properly. This is achieved by utilizing the
Ground/Earth screw on the back of each e.bloxx module. The screen of the sensor cable has to be grounded
at the same potential.
3.3. Power Supply
Non-regulated DC voltage b10 and +30 VDC is sufficient for the power supply of the modules. The input is
protected against excess voltage and polarity connecting error. The power consumption remains approximately constant
over the total voltage range, due to the integrated switching regulator.
Due to their low current consumption the modules can also be remotely supplied via longer lines. Several modules can
be supplied in parallel within the permissible voltage range and drop in the lines. If required, the supply lines together
with the bus line may be incorporated in one cable.
In order not to overload the module power supply needlessly and to avoid unnecessary line troubles, a separate power
supply is recommended for sensors with a large current drain.
The distribution voltage for the e.bloxx modules has to be protected by a fuse with maximum 1 A (inert). The modules
have an internal fuse (reversible) for protection against excess voltage, excess current and wrong polarity.