Endress+Hauser PROMAG 33, Operating Manual

Page: 30 / 126

4.6 Connecting E+H Rackbus and Rackbus RS 485
Promag 33 can be linked to other E+H measuring instruments using an
E+H-Rackbus and a Rackbus RS 485 and connected to higher process-control
systems such as MODBUS, PROFIBUS, ControlNet etc., with the help of a
corresponding gateway (see Fig. 30). A maximum of 64 addresses can be connected
to a ZA 672 gateway, including those connected to the FXA 675.
•
E+H Rackbus (19" Racksyst cassette)
– For use in a control room up to a max. distance of 15 meters.
– A maximum of 64 addresses can be integrated into this bus via a ZA 672 gateway.
•
Rackbus RS 485 (field housing)
– For use in the field up to a max. distance of 1200 meters.
– A maximum of 25 measuring instruments can be integrated
consecutively with the Rackbus RS 485 via FXA 675.
Commubox FXA 192 allows a direct connection to a PC (see Fig. 31).
Up to 25 Promag transmitters can be connected; however, the actual number
depends on the network topology and the application conditions.
Caution!
Even if only a single instrument (with Rackbus RS 485) has been installed in
hazardous area, not more than ten instruments (with Rackbus RS 485) may be
connected to the bus.
Note!
For the initial installation of a Rackbus network, please refer to the operating
instructions of the instruments and software you use, in particular:
•
BA 134 F/00/e “Rackbus RS 485 – Topology, Components, Software”
•
BA 124 F/00/en “Commuwin II operating program”
Caution!
Note!
ZA 673
FXA 675
u
u u
RS 232C
Gateway ZA 672
FXA 675 E+H-Rackbus
Rackbus
RS 485
PROFIBUS, FIP, MODBUS,
INTERBUS, etc.
PC with E+H program
“Commuwin II” and a
ZA 672-DDE server
Gateway connection to PCs or process-control systems
ba0
09y
75
Fig. 30
Connection versions to the
Rackbus RS 485 interface
4 Electrical Connection Promag 33
30 Hauser