DSC - Inputs
Page 18 of 80
representing the autopilot’s desired rudder position. The signal is a
differential voltage signal proportional to the autopilot’s rudder command.
Normally this signal is within ±10V where 0V defines a midship rudder
command and the ±10V defines ±45 degree hard over commands. The
voltage levels expected on this input are adjustable through the DSC.
This type of autopilot command signal does not require that the autopilot
system include its own rudder feedback signal. Analog command inputs
allow the system to retain proportional steering control which will
accelerate and decelerate the rudder during rudder movements
commanded by the autopilot.
Most analog autopilot systems are able to output two isolated analog
command signals. When this is available, dual independent rudder
systems will receive commands from separate autopilot output channels
and each DSC will continue to operate independently. When only one
analog command signal is available, the two steering control systems will
operate in a master / slave arrangement as described in section 1.3.3
,
however proportional control of the rudder can be maintained.
See also: 1.3.3
Autopilot Solenoid Analog Command Signals
1.3.5
Autopilot Acknowledge
1.4.4
Autopilot Request
Specifications
Maximum Differential Input: ......... ±10VDC
Differential Input Impedance: ....... 110 kΩ
Galvanic Isolation: .......................No
Connector: ...................................5.08mm pitch screw terminals
Installation
These connections may be combined in the same cable as the autopilot
‘Request’ and ‘Acknowledge’ handshake signals (see 1.3.5 and 1.4.4).
Autopilots are interfaced to the steering control system using either these
analog command signals or the solenoid command signals (see 1.3.3
).
Doc No.: MAN01504, 20-02-06 DSC 100 & MCP 100 Manual
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