Specifications

4.6 Transmitter AC Power
Circuits
NOTE: 230VAC is used in the following text
for simplicity, however the Single Phase A\C
MAINS can be from 198-251 VAC.
4.6.1
Single Phase AC Input
Refer To Figure 4-7 and VIEW 5 for the follow-
ing discussion. Single phase 230VAC input is
connected to contacts on the fuse block for F1
and F2 and is connected to Low Voltage Sup-
plies Main breaker CB1. RV7 and RV8 protect
the low voltage supplies from AC transients.
These MOVs are connected to the single phase
AC input through F1 and F2. Normally DS4
and DS5 on the Power Supply Status Panel are
illuminated GREEN when 230 VAC is present
and the protection is active. If an MOV should
fail, F1 and/or F2 will open and DS4 and/or
DS5 will not be illuminated GREEN.
When CB1 is set to the upper “ON” position,
the high side of the single phase 230VAC is
applied to the Controller Supply circuit breaker
CB2, LV Supplies Enable circuit breaker CB3,
K5 the Normal/Standby solid state relay, and
ServoSupplybreakerCB6.
4.6.1.1 Controller Supply
RefertoFigure4-7andseeVIEW7forcom-
ponent location. When CB1, the Low Voltage
Supplies Main breaker, is in the upper “ON”
position, single phase 230VAC is applied to the
Controller Supply circuit breaker CB2. If CB2
is in the upper “ON” position, single phase
230VAC is applied to T5. Multiple primary taps
on T5 allow operation of the transformer from
different input voltages. The secondary of T5
supplies 14 VAC to the AC connections on
bridge rectifier CR46. The negative output of
CR46 is grounded. The positive output is con-
nected to filter capacitor C7 and bleeder resistor
R7 and forms the +12VDC Controller Supply.
This supply is also connected to the anode of
K5 through R6. The purpose of this supply is
to accommodate the Standby Mode of opera-
tion.
4.6.1.2 Normal/Standby Mode
RefertoFigure4-7.WhenCB1,CB4,andCB2
are in the upper “ON” position and CB3 LV
Supplies Enable is in the Standby position, the
transmitter is in the “Sleep Mode.” All low
voltage supplies are turned off, except for the
+12VDC Controller Supply. This active
+12VDC supply will allow the controller to
respond to a turn on command. When the trans-
mitter is turned on from the front panel or from
Figure 4-6. Output Network
12/16/03 888-2339-002 4-11
WARNING: Disconnect primary power prior to servicing.