Honeywell NX4S1 Installation Guide - Page 38
RS-485 Connection via NetAXS™ with Multidrop Panels at Both Ends
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NetAXS™ NX4S1 Installation System Configuration 5.3 RS-485 Connections with Multidrop Panels at Both Ends of the Cable You can connect Multidrop panels at both ends of an RS-485 cable via either a NetAXS™ panel or a PCI-2 device. These configurations have not been reviewed by UL. Figure 18: RS-485 Connection via NetAXS™ with Multidrop Panels at Both Ends COM Port Terminal RS-485 Cable NetAXS Panels TB7-1 (RS485+) TB7-2 (RS485-) TB7-3 (RS485 COM) 4,000 ft. (1,200 m) max, 24 AWG, 2 twisted pairs with shield, 120 ohm, 23 pf (HAS part no. NCP2441-TN) RS-485 (4,000 Ft.) -485 Note DIP Switch Settings S1-S5 Panel Address s S6: OFF J36 CLOSED J37 CLOSED NetAXS Panel EG Only Earth Ground (EG) one side of cable EG EG Only Earth Ground (EG) one side of cable EG EG It is recommended to Earth Ground (EG) each NetAXS enclosure individual 28 www.honeywell.com
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