7
Rx
Tx
22
23
45
46
47
48
Made in Finland
13
14
15
16
17
18
19
20
21
10
11
61
62
63
85
86
87
88
70
71
72
68
69
= 63
Fig. 3. Rear view of synchro-check relay SPAU 140 C
U
aux
Auxiliary voltage
A,B,C,D
Output relays
IRF
Self-supervision
SGB
Switchgroup for the configuration of blocking and command signals
SGR
Switchgroup for the configuration of alarm signals
CB13
Circuit breaker close permission/close command, stage 1
CB23
Circuit breaker close permission/close command, stage 2
ALARM
Signal output
BS13
Blocking signal for stage 1
BS23
Blocking signal for stage 2
CS13
Control signal, request for CB closing, stage 1
CS23
Control signal, request for CB closing, stage 2
X1
Synchro-check relay module SPCU 3D45
X2
Power supply and output relay module SPTU 240 R4 or SPTU 48 R4
X3
Input module SPTE 3E10
T1...T6
Operation indicators 1...6
SERIAL PORT
Serial port for serial communication
SPA-ZC
Bus connection module
Rx Tx
Receiver (Rx) and transmitter (Tx) for the connection of optical fibres