Power Stage Interface Board; Power Supply Board - Allen-Bradley 1395 Troubleshooting Manual

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6-4 Test Points

Power Stage Interface Board

Power Supply Board

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Table 6.C Series A Drives Rated 40-100 HP, 230V AC & 75-200 HP, 460V AC
Test
Point Normal Value
1 12VDC (11.85/13.13)
2 +5V DC when field firing is enabled
3 0V DC
4 +12, (+11.85/13.13)V DC
+24, ±6.0V DC
5
6 +5V DC when armature firing is
enabled
7
8
9
10
11 Test points TP7-TP20 are used to
monitor the gate pulses to the
12
armature and field SCRs. The
13
observed signal for these test points
14
will be a square wave, +24V to 0V DC,
15
120 degrees On & 240 degrees Off
16 when the particular SCR is being fired.
17
18
19
20
21 0V DC when Relay K3 is energized
22 +5, (±0.02V DC)
23 +0, +0V DC
Table 6.D Series B Drives Rated 125-300 HP, 230V AC & 250-600 HP, 460V AC
Test Point Normal Value
1 12V DC (11.85 / 13.13)
2 0V DC when relay K3 is energized Control signal to K3
3 0V DC
4 +5 á¿0.02V DC)
5 +12 (11.85 / 13.13)V DC
6 +24, á¿6.0)V DC
7 +5V DC when armature firing is
enabled.
8 Not Used
9 +5V DC when field firing is
enabled
Table 6.E Series A Drives Rated 40-100 HP, 230V AC & 75-200 HP, 460V AC or
Series B Drives Rated 125-300 HP, 230V AC & 250-600 HP, 460V AC
Test Point Normal Value
1 +12V DC (11.85 / 13.13)
2 +5V DC á¿0.02V DC)
3 Internal use
4 12V DC (11.85 /13.13)
5 0V DC
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Signal Description
12V DC Power Supply
FFIREEN signal from Main Control Board
Not Used
+12V DC Power Supply
+24V DC Power Supply
AFIREEN signal from Main Control Board
Bridge Armature; SCR 1F
Bridge Armature; SCR 5F
Bridge Armature; SCR 3F
Bridge Armature; SCR 4R
Bridge Armature; SCR 2R
Bridge Armature; SCR 6R
Field; FLD1
Armature; 2F
Field; FLD2
Armature; 4F
Armature; 5R
Armature; 6F
Armature; 1R
Armature; 3R
Control Signal to K3
+5V DC power supply
Control common (TE signal ground)
Signal Description
12VDC Power Supply
Control common (TE signal ground).
+5V DC power supply
+12V DC power supply
+24V DC power supply
AFIREEN signal from Main Control Board
Not Used
FIREEN signal from Main Control Board
Signal Description
+12V DC Power Supply
+5V DC Power Supply
12V DC Power Supply
Control Common (TE Signal Ground)