TC Communications TC1710, User Manual, Page: 4 / 20

TC1710 RS-485
(Optional Dual Optics)
User's Manual
Rev. 1.6
−4−
For RS-422 and RS-485 Four-wire interfaces, pins 2(-) & 14(+) are inputs while pins 3(-) & 16(+) are outputs.
For Two-wire RS-485 interfaces, pins 3(-) & 16(+) are input/outputs.
Ω
Ω
Ω
RS-485 Pin Connections
Figure 3. Two-wire RS-485 Connection/Logic Diagram
Figure 4. Four-wire RS-422/RS-485 Connection/Logic Diagram