Johnson Systems JS-ICON Series Dimmer/Relay Rack (2410,2413,1220,1210/620) - Manual (Page 7)

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Power Supply Connection Details
Power Supply Configurations - Single Phase:
120/240 VAC, 1Ø, 4-Wire up to 100 Amps per phase. Maximum 24.0kW total.
Use wire size #14 to #1/0 AWG. Strip insulation length to 0.65" (16.5mm).
Torque power terminals (A, B, C) to 45-50 IN-LBS (5.0-5.6 NM).
Below is the dimmer phasing for each JS-ICON ™ Series dimmer rack model:
JS-ICON ™ 2410 and JS-ICON ™ 2413 (Example shown to the left)
• Dimmers 1 to 12 are powered from Phase A.
• Dimmers 13 to 24 are powered from Phase B.
JS-ICON ™ 1220
• Dimmers 1 to 6 are powered from Phase A.
• Dimmers 7 to 12 are powered from Phase B.
JS-ICON ™ 1210/620
• Dimmers 1 to 12 are powered from Phase A.
• Dimmers 13 to 18 are powered from Phase B.
NOTE: Power supply requires an external disconnect.
NOTE: For connection use copper wire only, rated 167°F (75°C) minimum.
Three-Phase to Single-Phase Conversion
JS-ICON ™ Series dimmer racks are normally shipped for three-Phase
operation unless otherwise specified at the time of purchase. Please contact
your supplier for a single-phase conversion kit if required. The following steps
will need to be followed to convert the JS-ICON ™ dimmer rack from three-
phase to single-phase operation.
1. Remove the three-phase copper bussbars by loosening all of the screws
terminals (use a medium sized #2 Philips or Flathead screwdriver) on
the left-hand side of the circuit breakers.
2. Insert the supplied single-phase copper bussbars, and tighten all of the
circuit breaker screw terminals to 20 IN-LBS (2.26 NM).
3. Reconnect the black #18 AWG wire (underneath) to the Phase A
bussbar.
4. Reconnect the red #18 AWG wire (underneath) to the Phase B bussbar.
5. Tape off or use a marette to isolate the blue #18 AWG wire.
6. Remove two (2) of the phase power terminals (use a 7/16" wrench or
socket) from the old three-phase bussbars, and fasten them to the new
single-phase bussbars. Use the original mounting bolts and tighten to
45-50 IN-LBS (5.0-5.6 NM).
7. Note that the default phase patch will need to be reconfigured when the
system is powered up. For more information, see “DEFAULTS” menu
item on page 30.
WARNING: Be sure all power connections are tightened to specification
before power supply is turned on.
∅ A
∅ B