Rs-485 Connections With Multidrop Panels At Both Ends Of The Cable; Figure 20: Rs-485 Connection Via Netaxs™ With Multidrop Panels At Both Ends - Honeywell NETAXS NX4L1 Installation Manual

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. This connection has not been reviewed by UL.
Figure 20: RS-485 Connection via NetAXS™ with Multidrop Panels at Both Ends
4,000 ft. (1,200 m) max, 24 AWG, 2 twisted pairs with
shield, 120 ohm, 23 pf (HAS part no. NCP2441-TN)
DIP Switch Settings
S1-S5 Panel Address
S6: OFF
J36 CLOSED
J37 CLOSED
EG
NetAXS Access Control Unit NX4L1 Installation Guide, Document 7-901099, Revision A
COM Port
Terminal
RS-485 Cable
NetAXS Panels
TB7-1 (RS485+)
TB7-2 (RS485-)
TB7-3 (RS485 COM)
NetAXS
Panel
Only Earth Ground (EG)
one side of cable
EG
It is recommended to Earth Ground (EG) each NetAXS enclosure individual
EG
EG
NetAXS™ NX4L1 Installation
System Configuration
RS-485 (4,000 Ft.)
-485
Note
s
Only Earth Ground (EG)
one side of cable
EG
33