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Capstone Turbine Corporation 21211 Nordhoff Street Chatsworth CA 91311 USA Technical Reference: Capstone C60/C65 Electrical Note 3: The Global E-Stop connection sinks 42 milliamps per MicroTurbine in a MultiPac E-Stop circuit. The voltage drop to the most remote MicroTurbine in the interconnecting cables must be kept to 6 volts DC maximum N51 on any global E-Stop multi-drop using W900 interconnecting cables. Use branch circuits for N>51. As an alternative, Connector J10, terminals 10 and 11 may be used with external wiring to connect the global E-Stop circuit in lieu of the W900 cables. The maximum voltage drop in this external cable must be < 6.0 Volts DC for the most remote MicroTurbine. J8 (A) J8 (B) J8 (C) J8 (D) J8 (E) J8 (F) J8 (G) J8 (H) J8 (J) J8 (K) J8 (L) J8 (M) Serial Communication (Not Applicable) Inter-Controller Start (Not Applicable) Global E-Stop (Not Applicable) (Not Applicable) Global E-Stop Return (Not Applicable) Inter-Controller Start Return (Not Applicable) Serial Communication RS-485, Bus A Protocol (Note 1) Chassis Ground +24 Volts DC @ 15 milliamps per MicroTurbine (Note 2) Chassis Ground Normal operation: N*42 milliamps. E-Stop: (+) 24 Volts DC (Note 3) Chassis Ground Spare Normal operation: N*42 milliamps. E-Stop: 0 Volts DC Reserved 30 milliamps per MicroTurbine @ 0 Volts DC Reserved RS-485, Bus B Protocol Table 9. Connector J8 – Inter-Controller (B) RS-485 Port Pin Signal Parameter Note 1: Whenever J8 is at the extremities of the RS-485 multi-drop network; Capstone-provided terminators must be installed. The maximum number of nodes is 32, and the maximum RS-485 cable length is 1000 meters. Each MicroTurbine has 1.93 meters of internal cable length, which must be included in the total length considerations. Repeaters may be added whenever the maximum cable lengths or the maximum numbers of nodes are exceeded. Note 2: No more than 20 MicroTurbines may be connected on one multi-drop branch. Parallel branch wiring must be used when N>20. Note 3: The Global E-Stop connection sinks 42 milliamps per MicroTurbine in a MultiPac E-Stop circuit. The voltage drop to the most remote MicroTurbine in the interconnecting cables must be kept to 6 volts DC maximum N51 on any global E-Stop multi-drop using W900 interconnecting cables. Use branch circuits for N>51. As an alternative, Connector J10, terminals 10 and 11 may be used with external wiring to connect the global E-Stop circuit in lieu of the W900 cables. The maximum voltage drop in this external cable must be < 6.0 Volts DC for the most remote MicroTurbine. 410001 Rev K (June 2009) Page 18 of 22 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or 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 Capstone Model C60/C65 Electrical
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