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FW-F074-A-M_v0404_01_EN.docx
5.4
CONFIGURATION EXAMPLES INTRINSICALLY SAFE APPLICATIONS
5.4.1
F074-A-OT-PX-XI-ZB - Ex ia IIC/IIIC
Fig. 27: F074-A-OT-PX-XI-ZB - Ex ia IIC/IIIC - Intrinsically Safe application.
*
Sensor supply voltage from unit not available in this example.
Please note: Type PX may be used in combination with the battery (Type PC).
PX will power the F074-A, the battery will be disabled automatically until the power is disconnected.
5.4.2
F074-A-OT-PD-XI-ZB - Ex ia IIC/IIIC
Fig. 28: F074-A-OT-PD-XI-ZB - Ex ia IIC/IIIC - Intrinsically Safe application.
*
Sensor supply voltage: terminal 6, same as input voltage terminal 5.
Please note: Type PD may be used in combination with the battery (Type PC).
PD will power the F074-A, the battery will be disabled automatically until the power is disconnected.
Configuration example IIA - IIB and IIC application - F074-A-OT-PD-XI-ZB
TERMINAL CONNECTORS
F0-series
HAZARDOUS AREA
SAFE AREA
*Sensor supply voltage for analog flowmeter type A / U: Terminal 6: as input voltage terminal 5 (internally linked).
Please note: type PD may be used in combination with the battery (type PC). PD will power the unit; the battery will be disabled automatically till power is disconnected.
1
2
Common ground
Signal
C
irc
ui
t d
ep
en
ds
o
n
ty
pe
o
f s
ig
na
l
7
8
Common ground
6
4
5
Common ground
Main supply
Supply *
9
1
0
Common ground
Supply backlight
Power supply type PD: 16-30V DC
Backlight option: type ZB
+
-
Power supply
For example
MTL5025
+
-
Power supply or
switch interface
For example
MTL5025
MTL5011B
+
-
Power supply
For example
MTL5025
= max. 30 V
= max. 200 mA
= max. 1,2 W
Uo
Io
Po
= max. 30 V
= max. 200 mA
= max. 1,2 W
Uo
Io
Po
= max. 30 V
= max. 200 mA
= max. 0,75 W
Uo
Io
Po
Note: above values are safety values.
Consult the technical specification for operational values.
Alarm output type OT: passive transistor
I.S. level sensor - input type A: (0)4-20mA
e.g. relay
Intrinsically Safe apparatus
