Bronkhorst®
Instruction Manual EL-FLOW® Select 9.17.099F14
2.5 Fluid connection
Install the EL-FLOW ® Select meter/controller in the line, in accordance with the
direction of the FLOW arrow on the body of the instrument. Tighten connections
according to the instructions of the supplier of the fittings. The use of Swagelok RS-
type stainless steel adapters is recommended, in combination with Bronkhorst®
elastomer O-rings.
Check the fluid system for leaks before applying full operating pressure, especially when using hazardous media (e.g. toxic
or flammable).
2.6 Electrical connection
Electrical connections must be made with standard cables or according to the applicable hook-up diagram. The factory
installed 9-pin D-sub settings are indicated in the hook-up diagram. Make sure that the power supply is suitable for the
power ratings as indicated in the hook-up diagram and that double or reinforced insulation is used for the power supply.
EL-FLOW® Select instruments are powered with 15…24 Vdc, depending on the fieldbus system (if applicable).
To prevent damage as a result of reversed polarity, the use of a 2A fuse in the direct +Us line is recommended.
The device described in this document contains electronic components that are susceptible to electrostatic discharge. In
order to prevent damage, proper handling procedures must be followed during installation, (dis)connecting and removing
the electronics.
The device carries the CE-mark and is compliant with the concerning EMC requirements. However, compliance with
the EMC requirements is not possible without the use of proper cables and connector/gland assemblies. Bronkhorst
recommends the use of their standard cables. These cables have the right connectors and loose ends (if any) are marked to
help prevent wrong connection. When using other cables, cable wire diameters must be sufficient to carry the supply
current, and voltage loss must be kept as low as possible. When in doubt, contact your Bronkhorst representative.
When connecting the product to other devices, be sure that the integrity of the shielding is not affected; always use
shielded cabling for signals and communication and do not use unshielded wire terminals.
Always isolate the electrical power before connecting or disconnecting equipment.
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 damage the printed circuit board irreparably.
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.
To Next Page
Loading...
