Si-tex SP38, Installation And Operation Manual, Page: 58 / 193

Sitex SP38 Installation and Operation
Document PN 29010101 V1r0
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Rudder Angle Indicators
The SP38 system will drive up to five 500 microampere Rudder Angle Indicator (RAI) meters,
such as those supplied by Sitex (PN 20360014). Mounting instructions are included with each
meter. Wire the meter to the plug for the SPU receptacle labelled
J8 – RAI O
UTPUT
. If you have
more than one RAI meter, they should all be wired in series, as shown in Figure 32 :
Figure 32 – Wiring Connections for Rudder Angle Indicators
Drive Outputs
The SP38’s SPU is capable of directly driving a variety of steering systems. Optional Drive
Boxes are available for those systems not handled directly by the SP38. Contact your Sitex
Dealer for more information.
Reversing Direct Current (DC) Motor Hydraulic Systems
The SP38 SPU can directly handle reversing DC motor hydraulic pumps drawing up to
approximately 20 amps. For larger current requirements, the Sitex CT2 Drive Box should be
used. To connect the pump motor directly to the SPU, use the diagram in
Figure 33 . Note that
wire polarity is not important, since the SP38 will automatically make the necessary adjustments
internally when the system is set up.
Note: Two very important steps when installing any hydraulic system are to bleed it of any air
trapped in the fluid, and to check for fluid leaks.