Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 71)

Chapter 4
Hardware Description
125 – 300 HP, 230VAC 250 – 600HP, 460VAC
4-7
Control Boards Feedback Board – The primary function of the board is to provide
scaling and transfer of feedback signals coming from power bridge devices
being sent to the Power Stage Interface and eventually to the Main Control
Board.
Figure 4.5
Feedback Board (A1) Overview
TB2
MFG Revision No. Assembly Part No.
Connection for AC current
feedback burden resistor
(Factory Installed)
1 2 3
1
4
TB1
J2
TB3
ЛЛ ЛЛ
5 6 7 8 9 11 13 15 17 18 20 23
J1
3
2
4
From DC
Current
Feedback
Sensor TD1
20 VAC
from
1 PT
AC Current
Feedback from
CTs ACT–1, 2 & 3
Field Current
Feedback from
FCT
3 Phase Incom-
ing AC Line
voltage Feed-
back
From Heatsink
Fan Switch
see Fig. 4.3
DC Armature Volt-
age Feedback
Connection to Power
Stage Interface
Jumper Selection
for Field Current
Feedback Scaling
(By User At Start-Up)
Note: No resister needed
on MKVA drives.
Table 4.A
Feedback Board Jumpers (see Table 8.J)
J1
Jumper
Position
125 – 300HP 240VDC
250 – 600HP 500VDC
Field Current Range
18.3– 42.4 ADC
8.6 – 18.4 ADC
2.3 – 8.7 ADC
1.0 – 2.4 ADC
1
2
3
4