Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 47)

Chapter 3
Hardware Description
40 – 100 HP, 230VAC
75 – 200 HP, 460VAC
3-7
Control Boards Feedback Board – Figure 3.5 illustrates the major hardware points on the
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 3.5
Feedback Board (A1) Overview
TB2
MFG Revision No. Spare Part Kit No.
Connection for AC current
feedback burden resistor
(Factory Installed)
1 2 3
1
4
TB1
J2
TB3
Л Л
5 6 7 8 9 11 13 15 17 18 20 23
J1
3
2
4
Connection for DC current
feedback burden resistor
(Factory Installed)
From DC
Current
Feedback
Sensor TD1
20 VAC
from
1 PT
AC Current
Feedback from
CTs ACT–1 & 2
Field Current
Feedback from
FCT
3 Phase Incom-
ing AC Line
voltage Feed-
back
From Heatsink
Thermoswitch
HST
DC Armature Volt-
age Feedback
Connection to Power
Stage Interface
Jumper Selection
for Field Current
Feedback Scaling
(By User At Start-Up)
Table 3.A
Feedback Board Jumpers (see Table 8.J)
J1
Jumper
Position
40 – 100 HP 240 VDC
75 – 200 HP 500 VDC
Field Current Range
9.1 – 21.2 ADC
4.1 – 9.2 ADC
1.1 – 4.2 ADC
0.65 – 1.2 ADC
1
2
3
4