Lathem AirTime AT-MSX - Manual (Page 5)

Installation & User’s Guide
Page 3
2. Pull and disconnect the removable terminal block and
connect the remote devices in the RS485 or Dry Sync
connecters. (IMPORTANT: RS485 requires proper polarity +
to +, - to -.) Once the connections are secure, reconnect
the removable terminal block.
Apply a minimum of 5.0 to 7.0 lb-in torque for tightening field
wires into the removable terminal block. Use Cat-3 or Cat-5
Twisted-Pair Wires. Use only Copper Wire.
3. Insert plug from AC power adapter into the Power In port.
4. Plug the power adapter into an 110vAC outlet.
5. The Status LED will flash once every two seconds. When the
signal is received, the LED will flash every second and the
AT-MSX will set its internal clock.