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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: MicroTurbine Communications Output Relays Six output relays can be user-configured to perform any function listed in the table at bottom of this page. The output relay connections are accessed through terminal pairs on Terminal Block TB5 (C30 UCB) or J15 (C60 UCB) in the UCB Communications Bay. Refer to Figures 1 and 2 for details. These output relays are simple contact closures intended for dry contact circuits. For some applications, the current draw required on the external equipment may exceed the rated current on the UCB relays. In these cases, an interposing relay must be installed. For auxiliary equipment, i.e. an external compressor requiring only a temporary contact closure, an external timed relay should be used. Electromechanical interposing relays are highly recommended over solid-state relays for electrical isolation. Refer to the Model C30 Electrical Technical Reference (410000) or Model C60 Electrical Technical Reference (410001) for current and voltage rating of the UCB relays as well as other details. Relay outputs are commanded to open or close based on Active status and Control Function settings. Note: All relays default to Active Open. Active Open (Normally Closed): Relay contact opens when function is true. Active Closed (Normally Open): Relay contact closes when function is true. The user may define each output relay with any function listed in the following table. CAUTION Software must be configured BEFORE making any electrical connections. Failure to do this may cause damage to the MicroTurbine and void the warranty. CAUTION The coil rating of the interposing relay must not exceed the rated current and voltage on the UCB relays, otherwise, permanent damage to the UCB board may occur. Function Standby Run Contr Closed Fault Stand Alone SA Load Disable Fuel On Fuel Purge Description Function is true when the system is in the Standby state. Function is true when the engine is running or power electronics are enabled. Function is true when the Output Contactor is closed. When a fault is active, this setting is true when the system active faults create a severity level greater than a warning. If the MicroTurbine is in the Stand Alone mode, this function is true. If the MicroTurbine is in the SA mode and in the Load State, this function is true. When the system is in the Disable state, this function is true. This function is true when the electrical fuel shut-off is enabled. Contact will be true for 10 seconds after the main fuel shutoff is closed (for units equipped with liquid fuel only). 410042-001 Rev A (February 2004) Page 4 of 10 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Technical Reference MicroTurbine Communications
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