HF110AEN_v0501_04
Page 35
5.3.
CONFIGURATION EXAMPLES INTRINSICALLY SAFE APPLICATIONS
Fig. 13: Configuration example 1 Intrinsically Safe.
91
0
11
Common ground
Common ground
Signal
Supply *
Main supply
Ci
rc
ui
t de
pe
nd
s
on
ty
pe
of
si
gn
al
Power supply type PD: 16-30V DC
Analog output type AP:
passive 4-20mA (output loop powered)
5
6
Common ground
0
1
2
123456
Flowmeter input type: A
(0)4-20mA
Ci = 17nF
7
8
Common ground
e.g. counter
e.g. indicator
TERMINAL CONNECTORS
F100-series
HAZARDOUS AREA
reset total
Status input type IB:
Ci is negligibly
small
12
13
Common ground
RXD
Common ground
TXD
28
26
29
DTR
+12V
27
+ 3.2V
low-pass
filter
1M
Modbus communication type CT: TTL
Configuration example IIB/
-
IIIC F110-A-AP-IB-CT-OT-(PD)-XI
Please note: power supply type PD is not required - unit is output loop powered - type AP.
Pulse output type OT:
passive transistor
Ci is negligibly
small
Ci is negligibly
small
e.g. indicator
e.g. PC
Note: above values are safety values.
Consult the technical specification for operational values.
e.g. counter
123456
* Note power supply type PD: the supply voltage to the sensor is as connected to terminal 1 (internally linked).
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
For example
MTL5525
Uo
Io
Po
= max. 30 V
= max. 100 mA
= max. 0.75 W