Technical data

58
1MRS751108-MUM
Protection Relay
Technical Reference Manual, General
REX 521
A051923
Fig. 5.2.6.-3 Rear view of REX 521 High
1
A051924
Fig. 5.2.6.-4 Rear view of REX 521 Sensor
1
1. Service Pin is mounted if the HW version contains LON.
RearViewMedium
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
X4.2
X4.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
X1
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
Service pin
X3.1
1
2
3
4
5
6
7
8
9
10
CE
Made in Finland
X3.2
Tx
X3.3
Rx
Data A
Data B
RS-485
RearViewMedium
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
X4.2
X4.1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
X2.1
1
2
X2.2
1
2
X2.3
1
2
X2.4
1
2
X2.5
1
2
X2.6
1
2
X1
27
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Service pin
X3.1
1
2
3
4
5
6
7
8
9
10
X3.2
Tx
X3.3
Rx
CE
Made in Finland
Data A
Data B
RS-485