Connecting handheld
terminals
•
Do not change batteries of the handheld terminal in explosion hazardous
areas.
•
For correct transmission of the communication signal, a minimum load of 250
Ω
must
be present between the connection points and the power supply.
Connecting the
Commubox FXA 191 for
operating via
Commuwin II
The Commubox FXA 191 connects Smart transmitters with a HART protocol to the
RS 232 C serial interface of a personal computer. This enables the transmitter to be
remotely operated with the Hauser Commuwin II operating program.
The Commubox FXA191 is used for intrinsically safe signal circuits.
1
2
3
+
Test
0003
4…20 mA
4...20 mA
min. 250
Ω
I
O
FMD 230:LIC0001
Online
1 >Group Select
2 PV
20 mbar
HELP
BA234Y1
7
any device
Figure 2.13
Handheld terminals can be
connected anywhere along the
4…20 mA cable
4…20 mA
1
2
3
+
Test
0003
4…20 mA
PC with operating
program Commuwin II
Commubox
FXA 191
minimum load
250
Ω
Cerabar S
BA234Y1
8
Figure 2.14
The Commubox can be
connected anywhere along the
4…20 mA cable
Cerabar S
2 Installation
Hauser
13