Bronkhorst®
Instruction Manual EL-FLOW® Select
9.17.099J
15
The
CE mark
on the equipment indicates that it complies with requirements imposed by the European Union, including
electromagnetic compatibility (EMC)
.
EMC can only be guaranteed by applying appropriate cables and connectors or gland assemblies:
·
Cable wire diameters must be sufficient to carry the supply current and minimize voltage loss.
·
When connecting the product to other devices, ensure that the integrity of the shielding remains uncompromised; use
shielded cables and connectors where possible and/or required.
·
Preferably use the supplied cables (if applicable) to make electrical (signal) connections to and between the supplied
components. These cables are shielded, have the required wire diameter, and loose ends (if applicable) are marked to
facilitate correct connection.
If not all requirements for proper shielding can be met (for example, because a component is not equipped with shielded
connectors), take the following measures to ensure the best possible shielding:
·
Keep cable lengths at a minimum.
·
Route cables as closely as possible alongside metal structures or components.
·
Ensure all electrical components are grounded to earth.
When in doubt about the shielding of your cabling and/or electrical connections, contact your Bronkhorst representative.
Always turn off electrical power before connecting or disconnecting equipment electrically.
2.7
Fieldbus connection
If the instrument is provided with a dedicated fieldbus interface, it can be operated digitally in a fieldbus system, using
RS485 communication. In FLOW-BUS, Modbus and DeviceNet™ systems, the fieldbus connector can also be used to power
the instrument. In other fieldbus systems, the instrument is always powered through the 9-pin D-sub power connector on
the side.
Never
power the instrument simultaneously from
two different power sources
(e.g. fieldbus and Plug-in Power Supply).
Doing so will irreversibly damage the printed circuit board and the instrument will have to be repaired before it can be
used.
Always check the total power consumption of your instruments before connecting them to a fieldbus system. Do not exceed
the maximum power of the power supply unit.
If you need assistance with setting up a bus configuration, contact your Bronkhorst representative for information.
2.7.1
FLOW-BUS
FLOW-BUS is a Bronkhorst® designed fieldbus, based on RS-485 technology, for digital communication between devices,
offering the possibility of host-control by a Windows computer.
Characteristics:
·
Baud rate 187500 (default) or 400000 Baud
·
+15…24 Vdc supply voltage
·
Easy installation and communication with other Bronkhorst® devices
·
Automatic node search and bus optimization (gap fixing)
·
RS-232 communication (
) with Windows computer (local host)
·
Connection of up to 120 instruments on a single bus
·
Maximum bus length: 600 m
Consult
Instruction manual FLOW-BUS interface
(document no. 9.17.024) for more information about setting up a
FLOW-BUS network.
