ATI
Model F12/D Gas Transmitter
Part 3
– Electrical Connections
29
O&M Manual (Rev-H)
3.17 Communications Jumper Setting
Units with an optional communications interface use a jumper to select between RS-232, RS-485, and
RS-485 with termination. The desired physical interface is set by positioning jumper JP5 as shown
below. The orientation does not matter, only its position.
Protocol
Alignment
RS-232
Top (toward JP5 label)
RS-485
Unterminated
Middle
RS-485
With termination
Bottom (away from JP5 label)
Figure 28. Comm. Interface Jumper
