Siemens SIMATIC ET 200X - Page 202

Technical Specifications
7-14
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
Basic circuit diagram
The basic circuit diagram of the basic module is show below.
DC 24 V-NS
PROFIBUS
address
Electronic
components
Internal power
supply
DC 24 V-NS RUN
A
DC 24 V-S
Load voltage
monitor
SF
RS 485
interface
B
DC 24 V-S
521
634
B
A
634
521
DESINA
connector
Backplane bus
interface
So. X1
So. X8
So. X3
So. X2
Socket connections
(see Table 7-3)
Short-circuit
protection
Short-circuit
protection
Short-circuit
protection
Short-circuit
protection
X01
X02
Figure 7-3 Basic circuit diagram for the BM 141 DI 8  DC 24V ECOFAST DIAG basic module
(6ES7 141-1BF40-0AB0)