AXBB charge pump fault

[john swift]

Does the other outputs work as expected ?

Assuming the output transtor is open drain and grounds the relay coil terminal to switch the relay on

With the power off you can use a multimeter to check the resistance between the negative supply terminal and each isolated output

in the manual
http://www.cncdrive.com/downloads/AXBB_E_manual.pdf
see diagram 9.1.2 .Connecting a solid state relay (SSR)

test between 24V0 and Ox

You should find they are all open circuit unless the transistor controlling the relay is short circuited

John

[CharlieRam]

With the power off you can use a multimeter to check the resistance between the negative supply terminal and each isolated output

in the manual
http://www.cncdrive.com/downloads/AXBB_E_manual.pdf
see diagram 9.1.2 .Connecting a solid state relay (SSR)

test between 24V0 and Ox

You should find they are all open circuit unless the transistor controlling the relay is short circuited

John

It looks like I'm getting approximately 100 ohms on output 1 to ground, all other outputs are open.

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