Ultraflux Uf 811 CO, Руководство пользователя, Страница: 6 / 106

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NT UF 811 CO GB (c) / March 2014
1.5 Power supply
 Range: 10–32 VDC (SELV networks)  Insulation: Safety class 3
 Peak power consumption: < 12 W  Average typical consumption: < 6 W
 Protection via resettable fuse (PTC)  Protection against polarity reversal
 Overvoltage protection in accordance with standard EN 61000-4-5
Notes :
 As the device is supplied from a protected extra low voltage network, an earth connection is not
mandatory. Nevertheless, it is strongly recommended to install an earth connection in order to
protect the installation, particularly when used outside with a long length of cable connected to the
device. The earth can be connected to the power socket or via one screw.
 It is recommended to install a disconnectable bipolar circuit breaker interrupter with visible cut-off
of 2 A upstream of the flow meter power supply. It is also recommended to install lightning
arresters on each of the inputs/outputs of the flow meter.
Important :
 The connectors must only be connected or disconnected with the power off and the equipment
isolated.
 If the flow meter unit is opened by anyone other than an Ultraflux technician, the warranty will be
rendered null and void.
 Ultraflux accepts no responsibility for incidents which may occur following a failure to respect these
instructions.
1.6 Communication
The Uf 811 has a serial link which can be wired using RS232 or RS485 mode. It also has a USB interface.
For this communication interface, the standard protocol chosen is the Slave JBUS (MODBUS). This enables
the device 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 device, unload the logger and
display the various values measured.
Please refer to the appendices for the JBUS configuration.
Note :
 If necessary, the 120 Ohm termination resistance for the RS485 may be added in the connector
between the Y and Z pins.
 The USB interface allows a computer to be connected for configuration. This may be accessed by
removing the IP protective cap.