LumaSense Technologies M390 - Manual (Page 16)

M390 Manual Operation 16
4.5.1 RS485 Option
RS485 two wire is available as an option. The connection scheme is shown below:
RS485 for multi-drop applications
Each M390 address must be set to a different value.
To change the address of an M390 (if RS485/RS422 was ordered):
1. Press and hold PAGE button. ACCESS and Level 1 appear in lower display.
2. Press UP button until LEVEL 3 appears in lower display.
3. Press UP button until 3 appears and wait.
4. Press PAGE until COMMS H appears.
5. Press UP until COMMS J appears. (J COMMS is the RS-485 output)
6. Press SCROLL until ADDRESS appears.
7. Press UP or DOWN to set new address and wait.
8. Press PAGE until ACCESS appears.
9. Press DOWN until LEVEL 1 appears and wait.
Note: A CD containing a sample program is included with your order. For more details
on communications, refer to the electronic communication manual also found on the
CD provided.
M390 Unit 1
(Address 1)
M390 Unit 2
(Address 2)