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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: C200 Hazardous Location Turbine Assembly Explosion Proof Terminal Block Connections See Figure 17 for the controller terminal block connections for the explosion proof components. This terminal block is identified as TB6-H. Before connecting wires to TB6-H, ensure that the bolts, hex nuts, and washers securing the lid of the explosion proof junction box are removed and the lid is open. After all connections are complete, close the lid of the junction box and secure it with the same bolts washers and hex nuts. Route the wires from the hazardous location controller through the customer access holes in the explosion proof junction box (see Figure 8). Refer to project specific drawings for controller connections. The requirements for connecting external wiring to terminal block TB6-H are as follows: • Use the shortest wiring route whenever possible. • Wires must be 18 AWG (0.823 mm2) individually shielded twisted pairs with maximum length of 500 feet (152.4 m). • Route the wiring through an approved conduit or cable tray in accordance with local and national codes. Do not run conduit containing signal wiring next to large motors, high current switches, or transformers. Signal wires must be routed though separate conduits based on their respective power levels. • Pressure Switch: TB6-H terminals 1 and 2 are connected to discrete input terminals on the hazardous location controller. The controller input terminals are powered by 24 VDC at the controller. • Heat Detectors 1 and 2: TB6-H terminals 3 and 4 are connected to discrete input terminals on the hazardous location controller. Each heat detector is connected by two twisted pairs to the terminal block for redundancy. The controller input terminals are powered by 24 VDC at the controller. • Gas Detectors 1 and 2: TB6-H terminals 5 through 14 are used for the gas detector connections. The requirements for the gas detector connections are as follows: o Power: Terminals 5 and 6 are connected to 24 VDC output terminals on the hazardous location controller. o GD 1 Analog Signal: Terminals 7 and 8 are connected to analog I/O terminals on the hazardous location controller. o GD 2 Analog Signal: Terminals 9 and 10 are connected to analog I/O terminals on the hazardous location controller. o RS-485: Terminals 11 and 12 provide Modbus A and Modbus B connections for gas detectors 1 and 2. These terminals are connected to the Modbus A and Modbus B connections on the hazardous location controller for the gas detector. 480047 Rev. B (November 2010) Page 40 of 82 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 | Application Guide Capstone Model C200 Hazardous Location Turbine Assembly
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