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FW_B-SMART_v0306-01_EN.docx
4.7.2
TERMINAL 5-6: ANALOG OUTPUT
The functionality of the analog output is programmed through the A-OUT menu (SETUP-menu 4).
See paragraph 3.3.5 for more details.
The analog output generates a 4-20mA output signal proportional to the measured flowrate and has
the ability to power the B-SMART from the loop. When the output is disabled, a constant current of
3.3mA is generated.
The analog output is passive and requires an external 12-30V DC supply to function with a
maximum driving capacity of 600 ohm @ 24V DC (24-12V/20mA). The output is not isolated from
the internal electronics. If the unit is only powered by the loop the backlight will not be activated.
Fig. 17: Terminal connections
– 4-20mA analog output
4.7.3
TERMINAL 7-8: DIGITAL OUTPUT
The functionality of the digital output is programmed through the D-OUT menu (SETUP-menu 5).
See paragraph 3.3.6 for more details.
One passive transistor output is available with a maximum pulse frequency of 100Hz.
Max. driving capacity 300mA@30V DC.
Fig. 18: Terminal connections
– Transistor output
4.7.4
TERMINAL 9-10: POWER SUPPLY
Connect an external power supply of 10-30VDC to these terminals. The maximum current is 25mA.
When power is applied to these terminals, the sensor voltage on terminal 4 becomes available,
discharge of the internal battery is disabled and the backlight can be used.
