Ultraflux Uf 841, User Manual

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NT UF 841 CP GB (d) / June 2015
1.6 Power supply
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Range: from 10 to 32 VDC, or from 110 to 240 VAC
50-60Hz
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Typical average consumption: < 6 W
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Peak power consumption: < 15 W
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Protection against polarity reversal
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Protection through resettable fuse
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Transient overvoltage: overvoltage category II
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Overvoltage protection in accordance with standard EN 61000-4-5
Important safety-related notes
:
•
A bipolar isolating switch with visible 2 A cut-off upstream of the device's power supply must be
installed. It is also recommended to install lightning arrestors on each of the unit's inputs/outputs
(requires specialist advice).
•
Whatever the means of power supply to the unit, it is recommended to install an isolating
mechanism close to it (emergency stop or other).
•
The flow meter is designed for fixed installation and must not be connected to the mains with a
plug-in cable (risk of an unidentified or poorly identified phase on a mains socket). It must be
connected to a terminal board on which the phase is correctly identified.
•
Crimp wiring lugs must be fitted on the exposed ends of the cable used to connect the mains to the
terminal board provided for this purpose ( phase + neutral).
•
The terminal boards must only be connected or disconnected with the power off and the equipment
isolated.
•
During maintenance or installation operations, the protective ground (external ground connection
on the box) must be connected first and disconnected last.
Ultraflux accepts no responsibility for incidents which may occur following a failure to respect these
instructions.
1.7 Communication
The Uf 841 has a serial link which can be wired using RS232 or RS485 mode, as well as a USB port . For
this communication interface, the standard protocol chosen is the Slave JBUS (MODBUS). This enables the
unit to be connected to an instrumentation and control system or to a computer. Ultraflux provides PC
software compatible with Windows (XP or later) which is used to configure the machine, unload the logger
data and display the various values measured.
Please refer to the appendices for the JBUS/MODBUS configuration.
Note :
•
The 120 Ohm "termination" resistance is provided in the electronic card to connect the RS485 A/+
and B/- signals. To connect it, a jumper (strap) should be fitted to the serial link terminal board as
indicated on the label describing the connection.
•
A USB interface allows a computer to be connected for configuration. This may be accessed by
opening the flow meter cover.