
Engineering Manual Introduction
15
Figure 7) shows the recommended method of installing a remote power supply. When
connected as shown the last node has sufficient voltage level.
Control unit
Node 1
A (+)
B (-)
A (+)
B (-)
IN OUT
A (+)
B (-)
IN OUT
Network
Aux
Node = 60mA
Total = 180mA
Node 2
Aux
Node = 60mA
Total = 180mA
MSPSU Node
Node 4
Node 3
Aux
Node = 60mA
Total = 180mA
I=360mA I=180mA I=180mA
Aux
A (+)
B (-)
IN
IN
AB
(+)(-)
OUT
AB
(+)(-)
120mA taken by detectors
Voltage at node:
12.8V
Voltage at unit:
13.6V
120mA taken by detectors
120mA taken by detectors
Voltage at node:
12.2V
Voltage at MPSU:
13.6V
120mA taken by detectors
Voltage at node:
13.02V
20m
14m 21m
Figure 7) Connecting Remote Power Supply Units
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