ABB SPAC 531 C User Manual And Technical Description page 7

The energizing input module SPTE 8C3 (SPAC
531 C) or SPTE 8C4 (SPAC 631 C) is located
behind the system panel in the left part of the
case. This module includes the calibration resis-
tors of the secondary burden as well as the
matching transformers. A screw terminal block
is fitted on the rear plate of the energizing input
module.
X0
X1
U11 U10 U6
Fig. 3. Block diagram for feeder terminals SPAC 531 C and SPAC 631 C
U1 Overcurrent relay module SPCJ 3C3
U2 Directional neutral current relay module SPCS 3C4
U3 Empty module location
U4 Control module SPTO 6D3
U5 Optional measuring module SPTM 8A1, SPTM 6A2 or SPTM 6A3
U6 I/O module SPTR 6B11 for the protection
U7...U9 I/O modules SPTR 4D1 or SPTR 4D2 for the control module (3 pcs)
U10 Power supply module SPGU 240 A1 or SPGU 48 B2
U11 Energizing input module SPTE 8C3 (SPAC 531 C) or SPTE 8C4 (SPAC 631 C)
X0 Screw terminals
X1...X6 Multi-pole connectors
SERIAL PORT Serial communication port
X2 SERIAL PORT
I >
3I>
I >>
3I>>
U1 U2
The mother PC board holds the card connectors
for the plug-in modules and the detachable
multi-pole connectors X1...X6 for incoming
and outgoing signals.
X3 X4 X5
U3 U7 U8
X6
O <-> I
I
U
P
Q
U x I
E
U9 U4 U5
7