Expansion modules are used as communication interfaces for 7KT PAC1500 counters. They have the following features:
- The expansion modules can be selected independently of the counter. These can also be retrofitted to existing measuring devices.
- Data transmission between the counters and the expansion modules is executed via the IrDA infrared interface.
- The expansion modules are placed alongside the counters in the installation direction so that their IrDA interfaces are exactly opposite each other.
