Signal Cause
Off The module has no supply voltage or connection.
Green The module and the master are exchanging information.
Green flashing The module has been initialised.
Red flashing Error in pump parametrisation
Red flashing, double Error in PROFIBUS configuration
Signal Cause
Off The module has not been initialised.
Green The module has been initialised.
Green flashing The module has been initialised and there are diagnostic mes‐
sages.
Red Serious exception error
3.4 Installation
All devices that are members of the bus system must be connected
in a line. Up to 32 stations are possible (masters, slaves,
repeaters).
The bus must be terminated with a terminating resistor at both the
beginning and end of the cable.
Use a screened, twisted-pair cable in conformity with EN 50170
(cable type A) for the PROFIBUS
®
cable.
The use of shielding, which is earthed at one end,
prevents low-frequency ground loops. Shielding
earthed at one end is not effective in countering
HF magnetic pick-up. Shielding earthed at both
ends as well as twisted conductors are effective at
countering magnetic HF pick-up but are not effec‐
tive against electrical HF pick-up.
We would recommend establishing a bilateral, low-inductance (i.e.
large area and low-impedance) connection with the protective
earth with PROFIBUS
®
.
The overall length of the bus cabling without repeaters varies
according to the required data transmission rate:
Tab. 32: Data transmission rate and length of the bus cabling
Data transmission rate Maximum length of bus cabling
kBit/s m
12,000 100
6000 100
3000 100
LED 2 (right) - module status
Bus installation
Plugs and cables
Supplementary operating instructions for PROFIBUS
®
51
To Next Page
Loading...
Need help?
General
