Specifications
Y1-03-0141F  10 
  WARNING: This wire MUST be fused with a 15 amp fuse in the Master 
Controller's in-line fuse-holder. 
Wiring to Searchlight 
The  RCL-50B  searchlight  is  supplied  with  a  12-foot  integral  wire  harness.  This  wire 
harness  is  cut  to  this  length  specifically  to  allow  for  a  voltage  drop. Shortening  the 
harness will decrease the life of the bulbs. Any extra length of wire harness should be 
loosely  coiled  in  a  convenient  place.  For  best  performance,  the  controller  should  be 
attached to the end of the 12' searchlight wire harness. If you must lengthen the wire 
harness, use heavy duty wire to minimize the voltage drop. This is especially important 
for the yellow lamp power and green lamp ground wires. 
Following  the  wiring  scheme  shown  in Table  1  use  the  supplied  butt  connectors  to 
connect the master controller to the searchlight. 
Wiring to Point Pad™ 
The  RG-59  coax  cable is  supplied  without  the  “F”  connectors attached  for ease  of 
routing. After the coax has been routed, strip the insulation and crimp the “F” connectors 
in place. Screw the “F” connectors to the master controller and the Point Pad™.  
Wiring to Power Supply 
The power source must be a fused 12 VDC, 5-amp supply or 24 VDC, 3-amp supply. 
Following the wiring scheme in Table 1, use the supplied butt connectors to connect the 
Master  Controller  to  the  power source.  Refer to  Table 2 for  proper wire  size  for 
connection of the input power lines. 
NOTE: As per the wiring scheme, the orange wire is connected to the positive terminal 
and the blue wire is connected to the negative terminal of the power source. 
CAUTION: observe polarities when attaching wires! 
Table 2 
Function 
The  URC-102  Master  Controller  is  designed  to  perform  up  to  six  different  duties  on 
searchlights, winches, and other electrical devices.  The Master Controller provides 
optimum voltage to ensure brightest performance and long lamp life, regardless of boat 
system voltage fluctuations. The Master Controller is compatible with devices requiring 
12 VDC or 24 VDC operation.   
Maximum Cable Length 
Wire Size 
12v System 
24v System 
#8 AWG 
25 ft. 
100 ft. 
#10 AWG 
15 ft. 
60 ft. 
#12 AWG 
10 ft. 
40 ft. 










