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CIU Installation, Operation & Diagnostics Edition: June 17, 2003
Page C-1
To test RS485 module set switch SB-3 & -4 Closed (ON) to loopback data to the host
modem. This test is for RS485 2- wire and 4- wire configurations.
Connect MIUXXXX/485 TXY (+) and TXZ (-) to the embedded controller
RS485
DIAGNOSTICS
RS485 CONNECTION FAILURE
To test RS485 module set switch SB-3 & -4 Closed (ON) to loopback data to the host
modem. This test is for RS485 2- wire and 4- wire configurations.
Connect MIUXXXX/485 TXY (+) and TXZ (-) to the embedded
controller RS485 connection
MIUXXXX/485 + ------------------- + RS485 embedded controller
- ------------------- -
In some applications RS485 TXY (+) and TXZ (-) may have to be connected
to RS485 embedded controller in the following setup
MIUXXX/485 + ----------------- - RS485 embedded controller
- ----------------- +