HF110PEN_v0501_04
Page 36
5.3. CONFIGURATION EXAMPLES INTRINSICALLY SAFE APPLICATIONS
910
11
Common ground
Signal
Supply *
Circuit depends on
type of signal
Analog output type AP:
passive 4-20mA (output loop powered)
5
6
Common ground
123456
Ci = 17nF
7
8
Flowmeter input
type: P
pulse
Common ground
e.g. counter
e.g. counter
123456
e.g. indicator
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
e.g. PC
+ 3.2V
low-pass
filter
1M
Modbus communication type CT: TTL
Please note: communciation type CT is allowed in IIC applications.not
Configuration example IIB/IIIC and IIC - F110-P-AP-IB-(CT)-OT-XI
* Note sensor supply voltage: 1.2 V DC for coil sensors or 3.2V DC for other pulse sensors.
Pulse output type OT:
passive transistor
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
+
-
+
-
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
* Note: Communication only allowed when configured as IIB/IIIC.
Fig. 14: Configuration example 1 Intrinsically Safe.