Siemens SIMEAS P 7KG7550 Operating Instructions Manual page 30

Table 3 I/O modules
Module
Type
Not
equipped
BO
2 binary
outputs
BI
2 binary
inputs
AO
2 analog
outputs
AI
2 analog
inputs
RO
3 relays
outputs
Terminal
28
Ordering
Allocation
section 1.4)
A
B
BOR
BO1+
BO2+
n.c.
C
BI1+
BIR
BIR
BI2+
D
AO1+
AO1-
AO2+
AO2-
E
AI1+
AI1-
AI2+
AI2-
G
RO1
RO2
RO3
ROR
Code
(refer to