21
The serial interface RS 485 on the rear panel of
the feeder terminal is intended for connection to
the SPA bus (Rx/Tx). The SPA bus is connected
by means of a connection module type SPA-ZC
17_ or SPA-ZC 21_. The bus connection mod-
ule SPA ZC 21_ is fitted to the 9-pole D-type
subminiature connector and screwed to the rear
panel. The connection module type SPA-ZC
17_ is connected to the feeder terminal with the
cable included in the delivery of the module and
fastened to the wall of the switchgear cubicle
with screws.
The 9-pole D-type subminiature connector
INTERLOCK is reserved for future use.
27
26
25
9
8
7
6
5
4
3
2
1
30
29
28
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
X1
12
11
10
9
8
7
6
5
4
3
2
1
X2
10
9
8
7
6
5
4
3
2
1
X6
12
11
10
9
8
7
6
5
4
3
2
1
X5
15
14
13
18
17
16
12
11
10
9
8
7
6
5
4
3
2
1
X4
15
14
13
18
17
16
12
11
10
9
8
7
6
5
4
3
2
1
X3
15
14
13
18
17
16
Rx Tx
INTERLOCK
SPAC 531 C
12
11
10
9
8
7
6
5
4
3
2
1
X1
12
11
10
9
8
7
6
5
4
3
2
1
X2
10
9
8
7
6
5
4
3
2
1
X6
12
11
10
9
8
7
6
5
4
3
2
1
X5
15
14
13
18
17
16
12
11
10
9
8
7
6
5
4
3
2
1
X4
15
14
13
18
17
16
12
11
10
9
8
7
6
5
4
3
2
1
X3
15
14
13
18
17
16
Rx
Tx
RS 485
27
26
25
9
8
7
6
5
4
3
2
1
30
29
28
21
20
19
18
17
16
15
14
13
X0
SPAC 631 C
Fig. 9. Rear view of feeder terminal SPAC 531 C and SPAC 631 C