Siemens 7SR12 Argus - 2.4 Power Supply Unit (PSU)

7SR11 & 7SR12 Description Of Operation
©2017 Siemens Protection Devices Limited Chapter 1 Page 17 of 88
BO 1
GND.
BI 1
+ve
-ve
+ve
-ve
IL1
22
24
28
2
4
BI 2
+ve
-ve
6
8
BI 3
+ve
-ve
10
12
14
16
18
20
IL2
IL3
IL4
25
26
27
28
BI 4
+ve
3
BI 5
+ve
5
BI 6
+ve
-ve
7
1
BO 2
6
5
4
1
2
3
BO 3
8
7
BO 7
11
13
BO 8
15
9
BO 4
10
9
BO 5
12
11
1A
5A
13
14
15
16
1A
5A
17
18
19
20
1A
5A
21
22
23
24
1A
5A
A
B
1
2
27
28
1
2
27
28
A
BO 6
V1
17
19
V2
21
23
V3
25
27
Rear View
Arrangement of terminals and modules
Shows contacts internal to relay case
assembly.
Contacts close when the relay chassis is
withdrawn from case
NOTES
BI = Binary Input
BO = Binary Output
Items shown in BOLD are ordering options
B
Data
Comms
(Optional)
BI 4
+ve
3
-ve
1
15
13
BO 8
11
9
BO 7
7
5
BO 6
Alternative 4BI 8BO Segregated BO
option without common connection
A
RS485
Screen
B
Term.
Figure 1-10 Connections Diagram for 7SR12 Relay