RC4500 Antenna Controller Chapter 3 Mechanical & Electrical Installation
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3.3.2.2 Resolver Inputs
NOTE: SHIELDED CABLE IS REQUIRED FOR THE RESOLVER CONNECTIONS. THE
SHIELD MUST BE CONNECTED TO THE RC4500 CHASSIS GROUND AT THE CONTROLLER
AND MUST NOT BE CONNECTED AT THE ANTENNA.
Three shielded twisted-pairs for each resolver are required to minimize noise pickup and cross-coupling,
which can result in antenna positioning errors. A cable such as Belden 8777 (RCI p/n CBL-3X2_22STP1)
is recommended. Most resolvers have flying lead connections. Wire-to-wire interconnects can be
accomplished with solder and heat shrink tubing or a waterproof crimp connector such as 3M™
Scotchlok™ UY2 (RCI p/n CN-JIZR-2).
ACU Resolver Cable Wire
Color
<1>
Description Resolver Wire Lead Color
Red (Red Foil) Sin + Yellow
Black (Red Foil) Sin - Blue
Drain (Red Foil) Sin Drain No Connect at Resolver
White (Green Foil) Cos + Red
Black (Green Foil) Cos - Black
Drain (Green Foil) Cos Drain No Connect at Resolver
Green (Blue Foil) Ref + Red w/ White Stripe
Black (Blue Foil) Ref - Yellow w/ White Stripe
Drain (Blue Foil) Ref Drain No Connect at Resolver
<1> The colors shown assume the use of Belden 8777 cable.
When installed in an AIU7, the resolver cables from the RC4500 may be terminated on user-accessible
terminal blocks to allow a more convenient installation. Below is a photograph that depicts a typical
installation that includes resolver terminal blocks.
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