38. Which length is recommended for data communication cable?
Recommended cable (data and power) length between cell modules is less than 10cm. If longer cables are used, please follow these recommendations (polarity and UP/DOWN cable directions mentioned are about that cell module):
• Power positive and data cables should not be routed next to each other in parallel. If this is unavoidable, the power positive and UP data cables (coming from the cell module) could be routed together in one current direction; the DN cable (coming into the cell module) then has to be routed further away, although this is still not recommended.
• To reduce any possible noise coming from power cables shielded cables can be used for data. Only the DN end of the shield has to be connected to the CGM’s negative terminal.