Fluidwell F030-A, Руководство пользователя

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Page 40
FW-F030-P-M_v0404_01_EN.docx
5.2.6 POWER SUPPLY WIRING
The F030-P can be powered from an extern power supply or via the isolated 4-20mA current loop.
An internal power supply is also available in the form of a lithium battery. When both external and
internal power supplies are available, the internal power supply is interrupted and will act as a
backup supply. Note that the optional backlight only works with an external power supply.
The following types of power supply are available for hazardous area:
•
Type PX / PD : As standard, all intrinsically safe products are supplied with terminal 4 and 5 to
power the product externally.
•
Type PC: Offers an internal intrinsically safe lithium battery.
This ATEX / IECEx certified battery (FW-LiBAT) may be replaced in hazardous
area, but only with a new certified FW-LiBAT battery. (See paragraph 6.3).
5.2.7 SENSOR SUPPLY
For type PC / PX
– Terminal 3: limited sensor supply
These types of power supply only offer a limited power supply. This power supply SHOULD NOT be
used to supply the flowmeters electronics, converters etc. as it will not provide adequate sustained
power! All energy used by the flowmeters pick-up will directly influence the battery life-time. It is
strongly advised to use a "zero power" pickup such as a coil or reed-switch when operating without
external power. The sensor supply at terminal 3 is fixed to 1.2V DC for coil type inputs and 3.2V DC
for all other types of flowmeter inputs (set by firmware).
For type PD - Terminal 6: sensor supply 8.2V
Besides offering the limited sensor supply on terminal 3 (see above), type PD also offers a real
sensor supply of 8.2V DC, for example to power a Namur sensor, on terminal 6.
5.3 TERMINAL CONNECTORS INTRINSICALLY SAFE APPLICATIONS
Terminal connectors F030-P-(PC / PD / PX)-XI-(ZB):
Fig. 36: Overview terminal connectors Type XI - Intrinsically Safe applications
•
Type PC:
offers - additional to type PX - an internal Intrinsically Safe lithium battery. This ATEX
certified battery (FW-LiBATT-xxx) may be changed in hazardous area.
•
Type PD:
offers with terminal 6 - additional to type PX - a real sensor supply of 8.2V DC to power a
Namur sensor for example.
•
Type PX:
as standard, all intrinsically safe products are supplied with terminal 4 and 5 to power the
product externally.
5
POWER SUPPLY
UNIT
TYPE: PD / PX
6 1 2
SENSOR SIGNAL
PULSE INPUT
TYPE: P
SIGNAL
3
+
8
CONTROL
OUTPUT
TYPE: OT
7
R1 R1 + +
10
POWER SUPPLY
BACKLIGHT
OPTION: ZB
+
SENSOR
SUPPLY
TYPE: PD
4 9