Only one CWB100 can be connected to each odd channel control port. For the CR800 and CR850, this relates to two total units—one on C1 and one on C3. On the CR1000 and CR3000, this amounts to four total units.
Putting more than one CWB100 on a data logger will NOT speed up sensor data collection. Only one CWB100 should be accessed at any given time, or the devices will interfere with each other. If multiple CWB100 devices are connected to a single data logger, the data collection schedules for the CWB100 devices should be staggered. Sufficient time should be built in to allow each base unit to collect data from all of the remote sensors associated with it and to allow for any needed retries.