HF012PEN_v0402_03 Atex_IECEx_CSA_FM
Page 23
Reed-switch:
The F012-P is suitable for use with flowmeters which have a reed-switch. To avoid pulse bounce
from the reed-switch, it is advised to select REED LP - low-pass filter (read par. 3.2.3.)
NAMUR-signal:
The F012-P is suitable for flowmeters with an Namur signal. The standard F012-P is not able to
power the Namur sensor, as an external power supply for the sensor is required. However, a 8.2V
sensor supply voltage (terminal 6) can be provided with type PD.
Terminal 4-5: POWER SUPPLY UNIT - TYPE PD / PX:
To power the unit an internal battery can be used (type PB) and / or an external DC power supply
of 8-30V DC (type PX) or 16-30V DC (type PD).
Connect the "-" to terminal 4 and the "+" to terminal 5. When power is applied to these terminals, the
optional internal battery will be disabled / enabled automatically to extend the battery life time.
Terminal 6: Power supply type PD: 8.2V sensor supply.
With this option, a limited power supply for the sensor is available, for example to power a Namur
sensor. It offers 8.2V DC (max. 5mA).
Remark: this terminal is only available if option PD has been ordered.
Terminal 9-10: power supply backlight - type ZB (option):
To power the backlight, a voltage in the range 20-30V DC has to be connected.
Maximum current 30mA. Connect the "-" to terminal 9 and the "+" to terminal 10.
INTERNAL EXTERNAL
Namur signal input
2
Common ground unit
SIGNAL
1
GND
shielding
Namur
820 Ohm
6
(Type PD: +8.1V)
+8.1V DC
INTERNAL EXTERNAL
Reed - switch signal input
2
Common ground unit
SIGNAL
1
GND
shielding
REED
SWITCH
+ 3.2V DC
1M
low-pass filter
selection REED-LP
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