
11
Electrical Connection – continued –
Wiring diagram of logic unit for monitoring SRL 63-a
X1
1234567891011121314151617181920
X3
1234567
1
2
3
4
5
6
7
8
9
10
D1
D2
E1
E2
F1
L1 N PE
2. SRL
18
17
20
19
16
X1
N
Q1 Q2 Q3 Q4
I1 I2 I3 I4 I5 I6 I7 I8L+ M
D1
D2
E1
E2
F1
X3
12 34567
N
SRL 63-a
Boiler
Valve:
D = steam
E = water
F = drain
Burner safety circuit
Connection for low-level limiter
Shutdown
Standby
Bypass
Bypass
Standby
Shutdown
Attention
External voltage!
Burner safety circuit
Attention
External voltage!
Connection for high-level alarm
Fig.5
Interval:
24h
Remaining:
2h
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