Introduction to i-on10Page 8Note 1: The maximum number of wired keypads for i-on10 includes KEY-RKPZ keypads.A KEY-RKPZ is a radio keypad that uses a KEY-RKBS base station wired to the bus. Upto two KEY-RKPZ keypads can connect to the same base station, but this feature cannotbe used to increase the total number of keypads beyond the limit shown in Table 1.System busi-on10 has a system bus, which is used to connect wired keypads or KEY-RKBS basestations to the control unit. The devices can connect to the bus using a "daisy chain" orstar layout, as shown in Figure 1.Figure 1. Daisy chain and star connectionsEach keypad has a unique bus address, which it obtains from the control unit either duringthe commissioning stage of a new installation, or when the installer adds the keypad fromthe Installer menu. Each keypad stores its address in non-volatile memory.Part-settingThe i-on10 can set in one of four ways: either full set or one of three part sets (part set B,C or D). Each zone can belong to one or more part sets (using the Part Set attribute).When the system is full set, the control unit sets all zones, irrespective of the part set theybelong to. When part set, the control unit sets only those zones that belong to the part set.Grade 2 complianceThe i-on10 is suitable for use in systems that need to conform to security grade 2requirements. For grade 2, you must fit an appropriate plug-by communicator.Default configuration settings are applicable to grade 2. Note that if you certain settings,the system may no longer comply with grade 2.Peripheral devicesThis section gives an overview of each type of additional hardware device supported.KeypadsKeypads are used by installers to configure the system, and by users to set or unset thesystem. Up to four keypads can be used.i-on10i-on10