Power Stage Interface/Switcher Board - Allen-Bradley 1395 Troubleshooting Manual

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Power Stage Interface/
Switcher Board
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Test
Point Normal Value
53 0V DC when measured with respect to
TE signal ground.
54 +12 (11.85 / 13.13)V DC when
measured with respect to TP53.
55 +12 (11.85 / 13.13)V DC when
measured with respect to TP57.
56 –12 (–11.85 / –13.13)V DC when
measured with respect to TP57.
57 0V DC when measured with respect to
TE.
58 +5, +0.02V DC measured with respect
to TP53.
Table 6.B Series B Drives Rated 1-30 HP, 230V AC & 2-60 HP, 460V AC.
Test
Point Normal Value
1 12V DC (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
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Test Points
Description
Isolated Ground. All isolated signals must be
measured with respect to TP53.
Isolated +12V DC analog voltage supply
+12V DC analog voltage supply.
+12V DC analog voltage supply.
–12V DC analog voltage supply.
Analog Ground. All signals must be measured with
respect to TP57. Isolated +5V DC supply voltage.
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)
6-3