6
Rx/TxX3X1X0
3I>
3I>>
Io>
Io>>
X2
O <-> I
I
P
Q
E
U2
U1
U3
U4U5
INTER-
LOCK
Fig. 3. Block diagram for the feeder terminals SPAC 310 C and SPAC 312 C
U1 Overcurrent and earth-fault protection module SPCJ 4D29
U2 Control module SPTO 1D2
U3 I/O module SPTR 3B12 or SPTR 3B13 for digital inputs and contact outputs
U4 Power supply module SPGU 240 A1 or SPGU 48 B2
U5 Energizing input module and motherboard SPTE 4F1 or SPTE 4F2
X0 Screw terminals
X1…X3 Multi-pole connectors
Rx/Tx Serial communication port
The case is made of extruded aluminium profile,
the collar is of cast aluminium and the cover of
clear UV-stabilized polycarbonate. The collar is
provided with a rubber gasket providing an IP
54 degree of protection between the case and the
mounting panel.
The cover of the case contains two push-buttons
which can be used for scanning through the
displays of the protection and control modules.
To reset the operation indicators of the protec-
tion and to use the local control push-buttons
of the control module, the cover has to be
opened.
The cover is locked with two finger screws. The
rubber gasket between the cover and the collar
ensures that the cover, too, fulfills the IP 54
requirements. The opening angle of the cover is
145°.
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