Notifier INA Manual page 22

INA
EIA-485 circuit characteristic impedance of twisted pair wiring should be approximately 120 ohms.
AMG-1
ACM-32A
ACM-16AT
Figure 2.6-1 EIA-485 to INA Connections
Figure 2.6-2 INA/EIA-485 Circuit Terminating Diagram
22 INA 15092:I 05/30/01
www.PDF-Zoo.com