If the channel was damaged dues to excessive currents.
An external circuit could be used to limit the +/- 30 mA limit per
channel.
A zener/resistor
combination circuit could be used to limit excessive currents.
While in most cases, this will protect the module, zeners with worst
case leakages could add from 3 to 16 LSB of non-linear error on the 16
bit module.
Regards,
Micaela N
National Instruments