
9
CyScan Positioning System • Installation and Maintenance Guide r1.1
GCS
GCS
Power Supply Unit (continued)
!
IMPORTANT: 0V is not the same as GND. 0V is the power supply return whereas
GND is a digital ground connection for the communication ports. If 0V and GND
are crossed or joined, the system will not function correctly.
!
IMPORTANT: When replacing the lid on the PSU, ensure that the rubber seal is
smeared with silicone grease (Dow Corning® DC4) to maintain a watertight fit.
To insert wires:
!
WARNING: Ensure all power is removed from the
system before altering any wiring.
1 Push a small flatblade screwdriver into the square
vertical hole at the front of the connector block
and press down on the lever inside.
2 While pressure is applied to the screwdriver, insert
the required wire(s) into the round hole adjacent to
the square hole.
3 Remove the screwdriver. Check that the cable is
securely held in place.
DP Signal Crossover
The RS485 connection between the
CyScan PSU and the vessel’s DP
system requires a crossover in order
that transmit and receive signals are
correctly routed. Ensure that the
crossover is correctly performed as
the cable from the DP system is
wired into the PSU.
1
2
3
4
5
6
7
8
9
10
11
12
3
191
817
161
514
13
20
21
3
232
323
222
222
22
23
3
Console
DP
Power
Power Input
90-264VAC 47-63Hz
0V AC
Earth
Conn.
1
2
3
Signal
RXA
TXB
TXA
RXB
GND
Connector
20
19
18
17
14
DP
OV
RXD+
TXD-
TXD+
RXD-
24V
Link GJ
GND
Link GJ
Cable Socket
A
B
C
D
E
F
G
H
J
Console
OV
RXD+
TXD-
TXD+
RXD-
24V
Link GJ
GND
Link GJ
Cable Plug
A
B
C
D
E
F
G
H
J
Power
Earth
24VDC
GND
Cable Socket
C
A
B
Signal
0V
24VDC
GND
RXA
TXB
TXA
RXB
Connector
23
22
11
10
9
8
5
Console Signals
(To Data Converter)
DP Connection
Main AC Power Input
3
RXA
TXB
TXA
RXB
GND
RXA
TXB
TXA
RXB
GND
CyScan
PSU
Vessel
DP System