23
All external conductors are connected to the
terminal blocks on the rear panel. Terminal
block X0 consists of fixed screw terminals fas-
tened to the energizing input module. The
connectors X1…X6 are detachable multi-pole
connector strips with screw terminals.
The male part of the multi-pole connector strips
are fastened to the mother PC board. The fe-
male parts with accessories are delivered to-
gether with the feeder terminal. The female
connector part can be secured in place by means
of fixing accessories and screws.
The measuring signal inputs are connected to
terminal block X0. Each terminal is dimen-
sioned for one max. 6 mm
2
or two max. 2.5
mm
2
wires.
Protective earth is connected to the screw, marked
with the earth symbol.
The binary inputs and contact outputs of the
overcurrent and earth-fault relay modules are
connected to the multi-pole connectors X1 and
X2. The auxiliary power supply is connected to
the multi-pole connector X1. The binary in-
puts, mA inputs and contact outputs of the
control module are connected to the multi-pole
connectors X3…X6. One max. 1.5 mm
2
wire or
two max. 0.75 mm
2
wires can be connected to
one screw terminal.
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
module 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 cubi-
cle with screws.
Terminals
and wiring
SPAC 536 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 636 C
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
Fig. 10. Rear view of feeder terminal SPAC 536 C and SPAC 636 C.
