ABB REX 521 - Terminal Diagram of REX 521: Medium

1MRS 751108-MUM
REX 521
49
Protection Relay
Technical Reference Manual, General
4.2.3. Terminal diagram of REX 521: Medium
Fig. 4.2.3.-1 Terminal diagram of REX 521: Medium
1A
5A
1A
0,2A
100V
1A
5A
1A
5A
1A
5A
X1.1
16
15
14
13
12
11
8
7
6
5
4
3
2
1
10
9
18
X4.2
DI1
DI2
DI3
DI4
DI5
DI6
DI7
DI8
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
X3.1
DI9
IRF
3
8
7
6
10
11
9
5
4
SO1
+
-
X4.1
1
2
SO2
12
13
PO1
PO2
PO3
14
15
17
18
TCS1
HSPO1
X4.2
3
4
1
2
Block_Medium_a
X3.2
X3.3
CT1
CT2
CT3
CT4
CT5
VT1
I
L3
I
L2
U
0
I
0
I
0B
I
L1
9
10
RS-485
DATA A
DATA B
S1
S2
S1
S2
P1
P2
L3
L1
L3
L1
A
N
da
dn
+
Q0
0
I
-
-
*)
-
+
+
**)
Mains
ACFail
SERIAL BUS
SERIAL BUS
TempAlarm
*) Power flow direction
**) The jumper is not assembled by default
when the protection relay is delivered