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GENERAL The Excel 500 is a freely programmable control and monitoring system designed specifically for building management. Using the latest Direct Digital Control (DDC) technology, the Excel 500's modular design is particularly well-suited for use in medium-sized buildings (e.g. schools, hotels, offices, shopping centers, and hospitals). With its LONWORKS® network interface, the Excel 500 is LONMARK™ compliant and offers a whole range of interoperability options. In addition to control applications for heating, ventilation, and air conditioning (HVAC), the Excel 500 also performs a wide range of energy management functions, including optimum start/stop, night purge, and maximum load demand. Up to four Building Supervisors can be connected via the system bus. A modem or ISDN terminal adapter can be connected directly to the XCL5010 for communication with a data transmission rate of up to 38.4 Kbaud via the public telephone network. The modular design enables the system to be expanded to meet growing needs. The data point user addresses and plain language descriptors are stored in the controller and are therefore available for viewing locally at an external interface without the need of a central PC. The Excel 500 is suitable for use in open LONWORKS networks. Thus, in addition to its own Distributed I/O modules (see Table 1), an Excel 500 can operate on the same LONWORKS bus as other Excel 500 controllers (each with its own Distributed I/O modules), Excel 10 and Excel 50 controllers, and other Honeywell and third-party LONWORKS devices. FEATURES • Various state-of-the-art communication options: Open LONWORKS® bus or C-bus communication between up to 30 Excel 500 controllers; modem or ISDN terminal adapter at up to 38.4 Kbaud; wireless communication via GSM; dial-up through TCP/IP networks • Unique features in open LONWORKS networks: NVBooster® reduces the number of required NVs and thus also the number of required controllers; NV bindings can be restored after controller reset (and thus need not be redone after exchanging controllers); 512 NVs supported for LONWORKS integration; autobinding between the CPU and Honeywell Distributed I/O modules makes NV binding unnecessary, thus saving considerable engineering time • Typically, 190 physical inputs/outputs can be controlled via network variables in a LONWORKS network • 128 physical data points, 256 pseudo data points, and up to 16 Distributed I/O modules per Excel 500 controller (C-bus communication) • DIN-rail mounting (e.g. in control cabinet) • Applications programmable with Honeywell's CARE programming tool and downloadable into Flash EPROM • Enhanced controller functions including: alarm, trend and global broadcast hysteresis, network-wide time synchronization, firmware downloading via modem and C-bus • Internal power supply module • Shared transformer (CPU and Distributed I/O modules connected to the same transformer) • Optimum access to terminals NOTE: The XCL5010 has no internal display; thus, an XI582AH operator interface or PC-based XI584 operator and service software is needed.