Endress+Hauser Mycom CLM 152 - 10 Profibus Interface; 10.1 FCYP Module

10 PROFIBUS
®
interface
10.1 FCYP module
In the simplest case, the complete measuring
cell consists of the Mycom CLM 152 and the
FCYP module (see Chapter 4, Fig. 4.12), a
bus coupler, a PLC or a PC with the
Commuwin II operating system and a
PROFIBUS-PA terminating resistor.
The maximum number of measuring
transmitters in one bus segment is
determined by their current drain, the
performance of the bus coupler and the
necessary bus length, see TI 260F/00/en.
Normally, you can operate a maximum of
32 Mycom CLM 152 instruments in non-Ex
applications in one bus segment.
10.2 Bus cable
Screened, twisted-pair cable should be used
in new installations (e.g. Belden 3097A,
Siemens 6xV 1830-5AH10). The FISCO model
(explosion protection) stipulated the following
characteristics:
• Loop impedance (DC): 15 ... 150 Ω/km,
Inductance/unit length: 0.4 ... 1 mH/km,
Capacitance/unit length: 80 ... 200 nF/km
Please refer to TI 260F/00/en Project panning
notes for PROFIBUS-PA and the
PROFIBUS-PA specification for information on
setup and network earth.
Cable connection
The bus line also carries the auxiliary energy
for the PROFIBUS
®
plug-in card and is
connected as follows:
• Insert cable through cable entry (e.g.
Beldon 3097A, Siemens 6xV 1830-5AH10)
• Connect bus cable to terminals
(see Fig. 4.12)
Terminal 99 PA+
Terminal 98 PA-
(Polarity reversal has no effect
on operation.)
• Connect screen to internal earthing terminal
• Connect external earthing terminal to
potential matching line.
Caution:
Multiple earthing of the protective
screen in explosion protection
applications is only permissible in
special cases.
PARAM
MEAS CAL
DIAG
PARAM
MEAS CAL
DIAG
PARAM
MEAS CAL
DIAG
Pipes with
conductivity sensors
PLC
profi-lf.CDR
PC with
Commuwin II
program
PROFIBUS-DP
Segment
coupler
PROFIBUS-PA
Fig. 10.1
Mycom CLM 152
measuring transmitter with
PROFIBUS-PAprotocol
lm152e10.chp
Mycom CLM 152 PROFIBUS
®
interface
Endress+Hauser 63