Lathem AirTime ATX6 - Manual (Page 25)

ATX6 Installation and User Guide
Page 21
When attaching wires to the terminal block the ATX6 should be in a
vertical position. If the ATX6 is horizontal the terminal block will not
lock down the wires.
Synchronizing a LTRX-512 to an ATX6 using RS485
Synchronizing the ATX6 from a LTRX-512
(Program Synchronization “485”)