Siemens CU240E-2 - Overview of the interfaces

Installing
3.2 Overview of the interfaces
CU240B-2 and CU240E-2 Control Units
Compact Operating Instructions, 01/2017, A5E39910322B AA
9
3.2
Overview of the interfaces
Interfaces at the front of the Control Unit
To access the interfaces at the front of the Control Unit, you must lift the Operator Panel (if
one is being used) and open the front doors.
①
Memory card slot
②
Terminal strips
③
Bus termination, only for
USS and Modbus field
buses
④
Fieldbus interface at the lower side
⑤
Selecting the fieldbus
address
On all Control Units with
the exception of
CU240E
-2 PN and
CU240E
-2 PN-F
⑥
Status
LED
⑦
USB interface for connection to a PC
⑧
Switch for AI
0 and AI 1
1)
(U/I)
•
I 0/4 mA … 20 mA
•
U -10/0 V … 10 V
⑨
Interface to the operator panel
1)
AI 1 is not available on the CU240B-2 Control Unit
Table 3- 1 Number of inputs and outputs
Digital
inputs DI
Digital
outputs DO
Analog
inputs AI
Analog
outputs AO
Fail-safe digital
inputs F-DI
1)
CU240B-2, CU240B-2 DP
4
1
1
1
0
CU240E-2, CU240E-2 DP,
CU240E-2 PN
6 3 2 2 1
CU240E-2 F, CU240E-2 DP-F,
CU240E-2 PN-F
6 3 2 2 3
1)
Each fail-safe digital input F-DI used takes up two digital inputs DI