4.0 TESTING PROCEDURE -CPU-2000 OUTPUT MODULES 291116-1, 291132-1
4.1 VOLTAGE OUTPUT TEST - Connect the Output Module to a test Logic Module. Reference
Installation Instructions form CPU-2000 II for correct wiring of the Logic Module. Set Logic Module
for energy level 2 (E2). Operate the test stand at 360 RPM leaving the 19-pin connector(s)
disconnected. Output voltage is measured from the "P" pin (+) to the "N" pin (-) and from the "P" pin
(+) to the "V" pin (-) with an oscilloscope. The output voltage should be 320 ±10 Vdc for both
measurements.
4.2 OPERATIONAL TEST - With the system completely connected, perform the following tests on the
Output Module. It is recommended that these tests be performed with the CPU-2000 Output Module
heated to a temperature of 150
°
F. (65
°
C.). Tests should be performed using a P4A180.HC memory
for 16-output units and a P8A180.HC memory for 32-output models, assuming the test stand uses
a 180 tooth gear.
180 TOOTH
GEAR RPM
TEST
75 RPM
All outputs fire a 15mm gap.
360 RPM
All outputs fire a 15mm gap.
360 RPM
Each cylinder fires consistently in sequence: Timing as follows starting with output "A"
and proceeding in alphabetical sequence:
Unit 291116-1:
A-B-C-D-E-F-G-H-J-K-L-M-R-S-T-U
Unit 291132-1:
5.0 OHMMETER CHECKS
A 1-A2-B 1-B2-C1-C2-D1-D2-E 1-E2-F1-F2-G 1-G2-H 1-H2-
J 1-J2-K 1-K2-L 1-L2-M 1-M2-R 1-R2-S 1-S2-T1-T2-U 1-U2
Note: X1
=
upper connector; X2
=
lower connector
5.1 CPU-2000 OUTPUT MODULE - The following tests should be made using a Simpson Model 260
analog volt-ohmmeter (VOM) set to "ohms". The ohmmeter scale should be set to "Rx 10,000".
Readings outside the range indicated establish a defective Output Module. A unit passing the
ohmmeter tests may still be defective and the full test should be performed using an oscilloscope
(see sections 6.0) to confirm correct operation.
A.
Check the resistance with the negative lead of ohmmeter connected to the "N" lead and the
positive lead connected to each output pin of the output (top) connector. If ohmmeter reading
is less than 250,000 ohms replace the Top Power Board (3-3, 4-3).
B.
Check the resistance with the negative lead of ohmmeter connected to the "V" lead and the
positive lead connected to each output pin of the output (top) connector. If ohmmeter reading
is less than 250,000 ohms replace the Top Power Board (3-3, 4-3).
C.
Check the resistance with the positive lead of ohmmeter connected to the "P" lead and the
negative lead connected to each output pin of the output (top) connector. If ohmmeter reading
is less than 250,000 ohms replace the Top Power Board (3-3, 4-3).
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5
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