Appendix C:diagnostics; Connection Failure - Telenetics MIU Dial or Leased Line modem with RS-485 Installation & Operation Manual

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
MIUXXX/485 + ----------------- - RS485 embedded controller
- ----------------- +
CIU Installation, Operation & Diagnostics
embedded controller in the following setup
Edition: June 17, 2003
Page C-1