22
INA 15092:I 05/30/01
Figure 2.6-1 EIA-485 to INA Connections
See Appendix A of the AM2020/AFP1010 manual for EIA-485 circuit ratings and limitations
EIA-485 circuit characteristic impedance of twisted pair wiring should be approximately 120 ohms.
Slide Switch 1 to the left when the INA is at
one end of the EIA-485 circuit.
Figure 2.6-2 INA/EIA-485 Circuit Terminating Diagram
Slide Switch 1 to the right (away from the
connector) when the INA is not at the
beginning or end of the EIA-485 circuit.
SW1
TB1
1
2
3+
4-
5+
6-
7
EIA-485
Reference
INA
P3
AMG-1
ACM-16AT
ACM-32A
TB2
4-
3-
2+
1+
TB2
4-
3-
1+
2
EIA485INA.cdr
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