
ST800 Guidance Notes
Issue 1 667/HB/27000/100 Page 3
Connections
The following diagrams detail the connections on the back of the power distribution
unit and the back of one of the lamp switch cards. The back of all the lamp switch
cards are identical, except it should be noted that the ZXO wires, the output from the
lamp supply monitoring transformer (LSupp) and the Solar Cell input must be
connected to the first lamp switch card.
Lamp Switch Card Back Power Distribution Unit
PLB z b d z d
32 EARTH
32 EARTH
NEUTRAL 30 IN LIVE 30
28 GREEN 28 LIVE INPUT
SUPPLY R/A 26 INPUT NEUTRAL 26
24 ZXO-N SUPPLY 24 NEUTRAL INPUT
(240V) ZXO-N 22 INPUT REG. 22
20 ZXO-LIVE (110V) 20 SOLAR SIGN.
SUPPLY
16
Sen34+
COMMON
LSupp-
16 16
SPARE N/C SPARE
16
14
Sen35+ Sen33+ LSupp+
14 14
ZXO-N N/C ZXO-L
14
12
Sen36+
12 12
0V 0V 0V
12
10
SOLAR
10 10
0V 5V(CPU) 5V(CPU)
10
81R 1G 8 8
12V 24V(DET) SSR
8
62R
2
1R
2
66
P/FAIL 5V(ESB) 5V(ESB)
6
42R 1A 4 4
REL-B REL-DIM 24V(CPU
)
4
21R
1
2A 2 2
REL-A LSupp+ LSupp-
2
PLA z b d z b d
32 3A 3R 32 32 DIM
30 3R
2
2G 30 COMMON NEUTRAL 30
28 2R
1
3G 28 28 NEUTRAL RETURNS
26 3R
1
4A 26 RETURNS NEUTRAL 26
24 4R 5A 24 24 NEUTRAL RETURNS
22 4R
2
4R
1
22 RETURNS NEUTRAL 22
20 5R
2
4G 20 20 NEUTRAL RETURNS
18 5R
1
5R 18 RETURNS DIM-LIVE 18
16 6R
1
5G 16 16 DIM-LIVE (240V)
14 6R
2
6G 14 (240V) DIM-LIVE 14
12 6R 6A 12 12 R/A (160V)
10 7R
1
7G 10 SUPPLY R/A 10
88R
1
7A 8 8 GREEN SUPPLY
67R
2
7R 6 SUPPLY GREEN 6
48R
2
8A 4 4 50-0-50V SUPPLY
28G 8R 2 SUPPLY
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