1-zone wired expander BUS module for LightSYS™ and ProSYS™ / ProSYS™ Plus main panels. 1 zone miniature module to connect detectors in BUS. The detector relay can be assigned to any zone number. Reduced size allowing installation in the detector. Dimensions: 11 x 38 mm. Connection to BUS. Max. distance: 300m. Consumption: 20mA (typical).