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Rockwell Automation Publication 20P-TG001C-EN-P - February 2018
Chapter 2
Component Test Procedures
Figure 10 - Field Terminal Block and Field Fuse Locations
6. Remove the cable from connector XP on the pulse transformer circuit
board.
7. Check the gate cathode junction of the field SCR/dual diode module.
With the digital multimeter set to “diode test” measure the resistance
across the modules (lead orientation is not critical). See
If a low resistance is detected, replace the SCR/dual diode module.
Table 10 - SCR/Dual Diode Module Anode to Cathode Junction Measurements
(+) Meter Lead
(-) Meter Lead
Nominal Meter Reading
Terminal
Terminal
U1
C1
“open” or ∞
U1
D1
“open” or ∞
V1
C1
“open” or ∞
V1
D1
“open” or ∞
C1
D1
“open” or ∞
C1
U1
“open” or ∞
C1
V1
0.50V
D1
C1
0.50V
D1
U1
0.45V
Table 11 - SCR/Dual Diode Module, Gate Cathode Junction Measurements
Measure from…
To…
Nominal meter Reading:
XP1
XP2
10…20 Ω
XP3
XP4
V1
C1
D1
U1
Bottom View of Drives
Drive with Fan on Bottom
Drive with no Fan on Bottom
Field Fuses
Field Terminal Block