F
u
nct
ion
D
iag
ra
m
s
CU3
20 in
put/outp
u
t
ter
m
in
als
2-
11
36
© Siemens AG
2007 All Rights Reserved
S
IN
A
MICS
S List Manua
l (
L
H1), 0
7
/2007
Fi
gure 2-3
2
2
121 – Dig
ital inp
u
ts, ele
c
trical
ly
is
olated
(DI 4 ...
DI 7)
- 2121 -
Function diagram
8
7
6
5
4
3
2
1
fp_2121_51_eng.vsd
DO: CU_GL, CU_GM, CU_S
SINAMICS
19.05.06 V02.05.00
CU320 input/output terminals - Digital inputs, electrically isolated (DI 4 ... DI 7)
+24 V
X124.M
X124.+
+
X132.1
X132.2
X132.3
X132.4
1= Simulation on
p0795.4
p0795.5
r0723.5
r0722.5
p0795.6
r0723.6
r0722.6
p0795.7
r0723.7
r0722.7
X132.5
M2
M
M
X124.M
M
+
24 V
5 V
<1> When using the electrical isolation, omit the
terminal jumper and connect the load power
supply shown as a dashed line.
<1>
X132.6
24 V DC to the next device
X124.+
+24 V
1
0
1
0
1
0
1
0
1
1
1
24 V
<1>
DI 4
DI 5
DI 6
DI 7
r0723.4
r0722.4
r0722
r0723
1
DI 0...DI 15
inverted
DI 0...DI 15
r0721.4
r0721.5
r0721.6
r0721.7
<1>
<1>
p0796.5
p0796.4
p0796.6
p0796.7
p0799