HF124PEN_v0501_04
Page 38
5.3.
CONFIGURATION EXAMPLES INTRINSICALLY SAFE APPLICATIONS
Fig. 15: Configuration example Intrinsically Safe.
Analog output type AP:
passive 4-20mA (output loop powered)
Ci = 17nF
7
8
Common ground
e.g. valve controller
TERMINAL CONNECTORS
F100-series
HAZARDOUS AREA
RXD
Common ground
TXD
28
26
29
DTR
+12V
27
Modbus communication type CT: TTL
Configuration example IIB
-
/IIIC F124-P-AP-CT-OT-PX-XI
e.g. valve
controller
e.g. PC
3
4
Common ground
5
6
Common ground
Ci is negligibly
small
Ci is negligibly
small
Switch output type OT:
passive transistor
Switch output type OT:
passive transistor
Alarm output 2
Alarm output 1
Safety inputl
Ci is negligibly
small
15
16
Common ground
+ 3.2V
low-pass
filter
1M
P
I
P
I
91
0
11
12
1
4
13
Common ground
Common ground
Signal
Signal
Supply *
C
irc
ui
t depends
on
ty
pe
of
s
ignal
Supply *
C
irc
ui
t depen
ds
o
n
ty
pe of
si
gn
al
Flowmeter input
type: P
pulse
Flowmeter input
type: P
pulse
Ci is negligibly
small
Ci is negligibly
small
e.g. sounder
e.g. sounder
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
+
-
+
-
Power supply or
switch interface
For example
MTL5525
MTL5511
= max. 30 V
= max. 100 mA
= max. 0.75 W
Uo
Io
Po
+
-
Power supply
and/or repeater
For example
MTL5525
MTL5541
Uo
Io
Po
= max. 30 V
= max. 100 mA
= max. 0.75 W
= 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
+
-
Power supply or
switch interface
For example
MTL5525
MTL5511
= max. 30 V
= max. 100 mA
= max. 0.75 W
Uo
Io
Po
+
-
Power supply
For example
MTL5525
Uo
Io
Po
= max. 30 V
= max. 100 mA
= max. 0.75 W