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Digital Input Devices
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Photo courtesy of AF Theriault & Portland Fire Deprt. / City of Portland Jastram Digital Input Devices A complete Jastram steering system will include some or all of our input devices combined with the appropriate control and hydraulic systems. The Jastram Digital Input Devices can only be used with the Jastram Digital Control system. The current line of Jastram Digital Input Devices include: • Digital Helms (with Digital Helm Manifolds) • Digital Wheels

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Digital Helm (cont) Digital Helm Manifold (DHM) U.S. Patent 6,564,739 / Cdn. Patent 2,353,053 This patented hybrid hydraulic / electric unit provides full follow-up digital electric control as well as emergency manual hydraulic control. Under power steering, the steering wheel is turned producing a rudder command signal the rudder then follows up to the position requested by the wheel. In the event of a power failure the digital helm seamlessly transfers to manual hydraulic steering. Under emergency manual hydraulic steering the number of turns depends on the size fo the actuators. Two...

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Digital Wheel (DW) Digital Wheels are unique input devices which provide full follow-up digital electric control. The two main features of the Digital Wheel over the standard electric wheel are: 1. A programmable number of wheel turns from ¼ to 10 turns lock to lock and 2. When taking over control of the steering system the Digital wheel takes over at the present position of the rudder Under power steering, the steering wheel is turned producing a rudder command signal. The rudder then follows up to the position requested by the wheel. • Only compatible with Jastram Digital steering systems...

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