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of devices or 20 m, whichever is shorter. The maximum cable length that can be used to connect devices to each other in a single system is 2 m x no. Cable lengthsĬables between devices may be up to 4 m long. Devices must not be connected in a loop arrangement.Ĭaution: Devices must not be connected in a loop arrangement. There is a high degree of freedom in device connection methods, and devices can be connected in a daisy chain or star arrangement, or in a combination of the two. It is not possible to connect more than this number of devices in a single system. The GPIB standard limits the number of devices that can be connected in a single system to 15 including the controller. Many researchers requested the ability to share information in real time.Īt CONTEC, we can use our extensive experience in developing measurement and control equipment and network devices to solve problems like these. IEEE-488.2-compatible instruments can communicate with other IEEE-488.2-compliant devices and with IEEE-488 devices within the scope prescribed in IEEE-488.ĭue to GPIB communication limitations (overall cable length of whole system), system must be operated and observations must be made near the telescope, which is inconvenient. In addition to the transfer methods specified in IEEE-488, IEEE-488.2 features syntax for text data and numeric expressions, and commands and queries that can be used by all instruments. GPIB standards include IEEE-488 and the higher-level protocol IEEE-488.2, which is currently mainstream. Many current measuring instruments support the GPIB interface as standard, and it is widely used in measurement systems using PCs and measuring instruments. GPIB was created as HP-IB, an in-house standard developed by Hewlett Packard, which was approved by the IEEE (Institute of Electrical and Electronics Engineers) and became an international standard. It is mainly used to connect PCs and measuring instruments. GPIB (General Purpose Interface Bus) was developed as an interface between computers and measuring instruments. Benefits of connecting GPIB devices to a PC.