HF127PEN_EL_TA_v0501_04
Page 39
Fig. 14: Configuration example 2 Intrinsically Safe
TERMINAL CONNECTORS
F100-series
HAZARDOUS AREA
Ci is negligibly small
Ci is negligibly small
91
0
11
12
1
4
13
19
18
17
Common ground
Common ground
Common ground
Common ground
Signal
Signal
Signal
Signal
TOTAL OF ALL CONNECTED
APPARATUS MAY NOT EXCEED
MINUS 17nF
(17nF IS USED BY THE ANALOG
OUTPUT SIGNAL TERMINAL 7+ 8)
Co
66nF
Supply *
Main supply
C
irc
ui
t depends
on
ty
pe
of
s
ignal
C
irc
ui
t de
pends
on
ty
pe of
s
ig
nal
Supply *
C
irc
ui
t depen
ds
o
n
ty
pe of
si
gn
al
* Note power supply type PD: the supply voltage is maximum 8.7V (Uo=8.7V Io=25mA Po=150mW)
Power supply type PD: 16-30V DC
(please note: PD
battery supply (type PC) is NOT allowed in IIC applications).
and
Flowmeter input
type: P
pulse
Flowmeter input
type: P
pulse
RXD
Common ground
TXD
28
26
29
Temperature input
type TA:
(0)4-20mA
0
1
2
Ci = 17nF
Analog output type AF:
passive floating 4-20mA
7
8
Modbus communication type CT: TTL
Please note: communciation type CT is allowed in IIC applications.
not
Configuration example IIB/IIIC and IIC - F127-P-AF-CT-EL-PD-TA-XI
DTR
+12V
27
e.g. PC
e.g. indicator
Due to analog output type AF, the unit has to be powered with
external power supply type PD.
Ci is negligibly
small
Ci is negligibly
small
Note: above values are safety values.
Consult the technical specification for operational values.
SAFE AREA
Isolator
TTL to:
RS232
RS422
TTL
For example:
MTL5051
I.S. Certified
+
-
= max. 30 V
= max. 250 mA
= max. 0.85 W
Uo
Io
Po
+
-
Power supply
For example
MTL5525
Uo
Io
Po
= max. 30 V
= max. 100 mA
= max. 0.75 W
* Note: Communication only allowed when configured as IIB/IIIC.
