Terminal Diagram Of Rex 521: Basic - ABB REX 521 Technical Reference Manual, General

REX 521
4.2.2.
+
Q0
*)
L 3
L 1
S 1
P 1
S 2
P 2
S 1
S 2
*) Power flow direction
**) The jumper is not assembled by default when
the protection relay is delivered
Fig. 4.2.2.-1

Terminal diagram of REX 521: Basic

48
Protection Relay
Technical Reference Manual, General
Terminal diagram of REX 521: Basic
L 1
L 3
A
N
X1.1
12
1A
11
5A
10
9
1A
8
5A
7
6
1A
5
5A
4
3
1A
2
5A
1
X4.2
5
-
6
7
8
9
10
11
12
13
14
15
16
17
18
X3.1
1
2
9
10
ACFail
TempAlarm
CT4
I
0
CT3
I
L3
CT2
I
L2
CT1
I
L1
TCS1
DI1
DI2
DI3
DI4
DI5
DI6
DI7
DI8
DI9
DATA A
RS-485
DATA B
1MRS 751108-MUM
X4.1
+
1
Mains
2
-
5
I R F
4
3
8
7
6
SO1
10
11
SO2
9
12
13
PO1
14
15
PO2
17
+
18
PO3
X4.2
4
3
** )
2
HSPO1
1 +
X3.2
SERIAL BUS
X3.3
SERIAL BUS
0
-
I
-