TC Communications TC2200R, User Manual

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TC2200R/S Bus
User's Manual
Rev. 2.2
Figure 11. 2-wire RS-485 Connection/Logic Diagram
For RS-422 and RS-485 4-wire interfaces, pins 2(-) & 14(+) are inputs while pins 3(-) & 16(+) are outputs.
Figure 12. 4-wire RS-422/RS-485 Connection/Logic Diagram
For 2-wire RS-485 interfaces, pins 3(-) & 16(+) are input/outputs.