Electrical Connection; Power Supply - BASI BFM921 User Manual

BASI

3.4 Electrical connection

Caution!

Only a competent person may connect the flowmeter to the mains power supply.

Protective earth conductor (PE) must be longer than neutral (N) and phase (L) conductors
after mounting mains supply voltage wires into pluggable terminal block on PCB.

Pluggable part of terminal block for mains voltage have to be secured by side flange screws
during flowmeter operation.

To prevent accidents, connect main power only after all other wiring has been completed.

In the case of a fixed connection an independent power switch or circuit breaker should be
located as close as possible to the flowmeter.

Only cables rated for appropriate voltage, current and temperature should be used for
wiring any electrical connections to the flowmeter.

Do not cross or loop cables inside electronic unit.

Use separate cable entries for power supply, input/output signal wires and electrodes/coils
(remote version) Each of the cable entries has its own cable grommet.

Take national applicable laws and rules into account.
The flowmeter can be connected to the power supply with either a fixed power cable or with a flying lead
cable and plug. Cable entries on the electronic unit can be used for flexible electrical cables. Cables with a
diameter between 8 and 10 mm must be used to keep protection IP67. It is not recommended to use rigid
metal or plastic conduits.
If user use a cable and plug it is recommended that the cable has a cross-section of 3 x 1.5mm
minimum length of 1 m.
.
3.4.1

Power supply

To connect the compact version to the power supply the following procedure should be used :
1. Disconnect power to the unit before attempting any connection changes.
2. Open flowmeter case.
3. Connect the protective earth (PE) – ground wire, line and neutral to supplied pluggable part of terminal
block.
4. Insert pluggable part of terminal block to connector on PCB. Connector has 3 pins and is located in the
bottom right corner of the bottom PCB. Please observe connector polarity.
5. Secure pluggable connector flanges tightening screws.
6. Close flowmeter case
7. Switch on the power supply.
Operation manual
Electromagnetic flowmeter BFM921
2
and with a
13