Siemens SIMATIC Distributed I/O System DP/ASi Link, Manual

Page: 16 / 152

1-4
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
Connections
– PROFIBUS-DP
– ASi cable
– 24 V DC power supply
Optical isolation between PROFIBUS-DP and ASi
Direct ET 200 Handheld connection possible for setting the station num-
ber (using an adapter cable)
ASi diagnostics using LEDs
The diagnosis can also be read using the DP master.
The DP/ASi link has LEDs with the following meanings
– RUN
– BF (bus error)
– ASi POWER FAIL (ASi power supply failure)
– CONFIG ERROR (configuration error)
– AUTOPROG AV (automatic programming possible)
– CONFIG MODE (configuration mode)
– ASi-SLAVE FAIL (5 LEDs for displaying the failed ASi slave)
The DP/ASi link can be operated on the PROFIBUS-DP with a baud rate
of up to 12 000 kBd.
Length of PROFIBUS bus cable
The following values apply to installation of the DP/ASi link for the
PROFIBUS bus cable as a function of the baud rate on the bus.
Table 1-1 Length of the PROFIBUS bus cable as a function of the baud rate on the
PROFIBUS DP bus
Baud Rate Max. Length of Bus Cable
< 187.5 kBd 1200 m per segment
187.5 kBd 1000 m per segment
500 kBd 400 m per segment
1500 kBd 200 m per segment
> 1500 kBd 100 m per segment
Overview