The gas detector is part of the digital KIMESSA CANline BUSNetwork which is designed for up to 128 gas detectors and alarming units. The CANline 32+ may be connected to a total of 32 digital sensors along with 6 of relay cards. 3 CANline-Bus-Expander cards may be connected for an additional 3×32 digital sensors inputs giving a total of 128 sensors. Maximum of 128 relays may be connected (6 Relay cards on the CANline 32+ and 3×6 relay cards on the CANline-Bus- Expander).