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Instruction Manual for EMERSON models including: 535-2711 Termination Blocks Modbus, 535-2711, Termination Blocks Modbus, Blocks Modbus
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DocumentDocumentTermination Blocks Installation Instructions Third-party devices may or may not have onboard termination jumpers (consult the manufacturer's instructions for termination information). For devices that have no termination capabilities or do not supply the required termination resistance, Emerson offers termination blocks that can be used. To terminate MODBUS network endpoints, use P/N 535-2711; 150 ohm termination required for all E2, E3 or Site Supervisor RS485 networks (do not use 120 ohm termination even if supplied with end of line device). To terminate Echelon network endpoints, use P/N 535-2715. Wire the termination block across the RS485 + and RS485 terminals of the end device on the daisy chain. Connect the block to the end device on the daisy chain using six inches or less of wire from the network cable used for the daisy chain (Figure 2), and optionally if recommended, connect the shield wire to earth ground, keeping the exposed shield wire length as short as possible (three inches ideal maximum length). Part Number 535-2711 535-2715 535-2710 Description Use For MODBUS Termination Block Echelon Termination Block OBSOLETE MODBUS Termination Resistance Echelon Termination Resistance Table 1 - Emerson Termination Blocks Ohms 150 ohms 105 ohms 52.5 ohms Figure 1 - Termination Block Figure 2 - Termination Block After Last Device on Daisy Chain Document Part # 026-4830 Rev 1 This document may be photocopied for personal use. Visit our website at www.climate.emerson.com for the latest technical documentation and updates. Join Emerson Technical Support on Facebook. http://on.fb.me/WUQRnt For Technical Support call 833-409-7505 or email ColdChain.TechnicalServices@Emerson.com The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. Emerson reserves the right to modify the designs or specifications of such products at any time without notice. Responsibility for proper selection, use and maintenance of any product remains solely with the purchaser and end-user. © 2022 Emerson is a trademark of Emerson Electric Co.