Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 79)

Chapter 4
Hardware Description
125 – 300 HP, 230VAC 250 – 600 HP, 460VAC
4-15
DC Control Voltage Distribution – The Unit Power Supply converts
115VAC (supplied as shown in Figure 4.12) to +5VDC and +/– 12VDC
control voltages. In addition to the voltages supplied by the Unit Power
Supply, the Power Stage Interface converts the 20VAC coming from the
control transformer PT to 24VDC which is used for relay logic and
provides the supply voltage to the SCR Pulse Transformer and Snubber
boards to produce SCR gate signals for the armature and field.
Figure 4.12
DC Power Distribution and Control Common
J6
Port
B
J5
115
VAC
3
4
TB1 J2
20
VAC
FEEDBACK
BOARD
J1
A6
UNIT POWER
SUPPLY
J7
TP51 +5VDC
J7
TP52 DGND
5
J2
TP55 +12VDC
TP57 AGND
TP56 –12VDC
Port
A
TP54 ISO 12V
TP53 ISO GND
J1
Balun
A7 POWER
STAGE
INTERFACE
TB3
13
14
Encoder
Power
Supply
(+12 VDC)
10
11
Balun
J4
TP4 +5VDC
+5V
J8
To
Prog
Term
1
3
5
7
9
2
4
6
8
TE
TB10
1
2
Common (ISO)
+12 VDC (ISO)
Common (ISO)
+12 VDC (ISO)
TP6 +24VDC
TP1 –12VDC
TP3 Common
TP5 +12VDC
ISO +12VDC
ISO RTN
PT
PE
TE
TB1
F5
TB5
Shield
TX + RX +
TX – RX –
PE
C11
C40
C39
10 10
9 9
Balun
Balun
TE
A8 MAIN
CONTROL
BOARD
TP41 24V Sense
(approx. 4VDC)