127
FORM 160.54-M1
ISSUE DATE: 10/25/2019
JOHNSON CONTROLS JCI COMPANY CONFIDENTIAL
11
SECTION 11 - POWER SUPPLY
The Power Supply provides the DC power for the
LCD Display and all the printed circuit boards in the
OptiView Control Center. It receives a 102 VAC to
132 VAC input from an external power source and
provides the following DC outputs:
• -12 VDC
• +12 VDC
• +5 VDC
• +24 VDC
• Ground
The +24 VDC output provides power to the CM-2
Board (Electromechanical Starter applications), Solid
State Starter Logic Board (Mod A Solid State Starter),
Solid State Starter Logic/Trigger Board (Mod B Solid
State Starter) or Adaptive Capacity Control (ACC)
(Variable Speed Drive applications). If the Chiller
is equipped with Proximity probe Part number 025-
30961-000 or 025-35900-000, the Probe is also pow-
ered by this +24 VDC.
The -12 VDC, +12 VDC, GND and +5 VDC outputs
are applied to the microboard. There, these voltages are
applied to the circuits requiring the respective voltage.
From the microboard, the +12 VDC and +5 VDC are
distributed to other system components requiring these
voltages. These include the E-Link Gateway, Proxim-
ity probe (025-xxxxx-000 only), I/O Board, VSD Oil
Pump, LCD Display and Display Backlight Inverter
Board. The Condor Power Supply allows adjustment
of the +5 VDC output. To account for losses in wiring
and connections and ensure sufficient voltage level at
the microboard input, the “V AdJ” (R51) potentiometer
is adjusted to achieve +5.1 VDC at the input to the mi-
croboard J1-1.
As shown in Figure 12 on page 41 (031-01730-000
Microboard) and Figure 19 on page 67 (031-01730-
000 Microboard), the microboard contains two voltage
regulators that create separate +5 VDC and +3.3 VDC
supplies. The +5 VDC supply is dedicated to all the mi-
croboard Analog circuits and is labeled as the +5 VDC
(Analog) supply. It is also routed to all Pressure Trans-
ducers, Temperature Thermistors, Proximity probe and
Motor Controller Board (CM-2, Mod A Solid State
Starter Logic Board or VSD ACC Board).
29136A
FIGURE 52 - POWER SUPPLY
This permits all Analog circuits to be powered by the
same supply, eliminating any offsets caused by volt-
age regulator drift. Microboard 031-02430-000 has an
additional voltage regulator that provides a 2.5 VDC
power source. The +3.3 VDC supply is utilized by the
Microprocessor, Flash memory card and other digital
circuits. It could also be applied to the Backlight In-
verter Board, depending on the Display manufacturer’s
requirements as explained below.
Different Display manufacturers can require differ-
ent supply voltages for their display and supporting
circuits. To accommodate the different Display manu-
facturer’s voltage requirements, Microboard Program
Jumpers JP2 and JP5 must be positioned to provide the
required supply voltages to the Display and the Dis-
play Backlight Inverter Board. Either +5 VDC or +3.3
VDC, as determined by JP2, is applied to the Display.
Either +12 VDC or +5 VDC, as determined by JP5, is
applied to the Display Backlight Inverter Board. Refer
to Microboard Program Jumpers.
The chiller could be equipped with either of two Prox-
imity probes. The power supply requirements are dif-
ferent for these Probes. All probes operate from a +5
VDC power source. Probe 025-30961-000 and Probe
025-35900-000 require a +24 VDC source that is
tapped off of the supply to the CM-2 Current Mod-
ule (Electromechanical Starter applications), Solid
State Starter Logic Board (Solid State Starter applica-
tions) or ACC Board (VSD applications) as shown in
SECTION 15 - PROXIMITY PROBE of this manual.
The 031-03630-001 Microboard has a different J1
power connector and therefore requires a different
power supply wiring harness. The new wiring harness
part number is 571-06765-272.
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