Siemens SIMATIC ET 200X - Basic Circuit Diagram of Expansion Module EM 142 DO 4 X DC 24 V;2 A

Technical Specifications
7-55
ET 200X Distributed I/O Device
EWA 4NEB 780601602-06
Basic circuit diagram
The basic circuit diagram of the expansion module is shown below.
Socket connections
(see Table 7-26)
Backplane bus
interface
2M
2L+
2M
Load power supply via
backplane bus
Figure 7-13 Basic circuit diagram of expansion module EM 142 DO 4 x DC 24V/2A
Covering up unused connections
You must seal off any connections which are not required with M12 screw caps, in
order to ensure that the degree of protection (IP 65, IP 66 or IP 67) is achieved.