Siemens SIMATIC ET 200C, Manual

Page: 24 / 333

1-6
ET 200C Distributed I/O Station
EWA 4NEB 812 6119-02b
The digital modules have the following LEDs
– RUN
– BF (bus fault)
– DIA (diagnostics of the inputs/outputs or undervoltage of the outputs)
– U
L
in DO 8 DC 24V/0.5A and DO 8 DC 24V/2A or U
L1
, U
L2
in
DI 16/DO 16 DC 24V/2A (load voltage supply of the outputs)
– Status of the inputs/outputs or individual diagnostics
The analog modules have the following LEDs
– RUN
– BF (bus fault)
– DIA (diagnostics of the inputs/outputs)
High data throughput:
The bus accommodates, for example, the IM 308-C master interface and
ten ET 200C; DI 16/DO 16
DC 24V/2A distributed I/O stations each
with 2-byte inputs/outputs. The baud rate is 12 Mbaud. The reaction time
for a complete data cycle is thus 0.45 ms.
The reaction time t
DP
for a data cycle is calculated as follows:
t
DP
= A
+ (B + (number of I/O bytes T
byte
)) [slave 1]
+ (B + (number of I/O bytes T
byte
)) [slave 2]
+ ...
+ (B + (number of I/O bytes
T
byte
)) [slave n]
A, B, T
byte
= master-dependent constants
Table 1-1 Maximum baud rates with components of ET 200C
With master interface ET 200C components Maximum baud rate
IM 308-B All digital modules 1.500 kbaud
IM 308-C All digital modules 12.000 kbaud
IM 308-C All digital modules 1.500 kbaud
Characteristics of
the ET 200C
(Continued)
Configuration