[philso]

Capacitors on the motors are good insurance. You may need to experiment with the value of the capacitor that you put on any particular motor. A smaller capacitor, say 0.01 uF, will kill high frequency noise better than a larger capacitor, say 1 uF.

Our team has experienced interference from the CIM's causing the D-Link to drop it's connection each time the motor started up. At a different location (probably with less electrical noise flying around) it works fine.

There are different EMC Immunity standards, each with different levels. The only think they have in common is that your equipment will not be damaged by the EMC directed at it. At the higher levels, the equipment must continue to operate correctly in the pressence of the EMC. At the lower levels, it is permissible for the equipment to malfunction in the pressence of the EMC and will resume proper operation once the EMC is removed. At the lowest level, the equipment is allowed to reset when the EMC is applied.