4.2.2.2 Com 1 - Rs-485 2-Wire: Host/Tms Communications - Toptech MultiLoad II EXL Installation Manual

CHAPTER 4– DATA COMMUNICATIONS INTERFACE

4.2.2.2 COM 1 - RS-485 2-Wire: Host/TMS Communications

The Host/TMS Computer System can be connected to the MultiLoad II/ RCU II via RS485 2-Wire
on COM 1.
The TD and RD pairs tied together at the Host/TMS and all MultiLoad II/ RCU IIs.
Host/TMS
RS485
TDA
TDB
RDA
RDB
Figure 4.4
MultILoad II / RCU II can be multidropped on the same communication line using RS485 – 2 Wire
on COM 1:
Host/TMS
RS485
TDA
TDB
RDA
RDB
Figure 4.5
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MultiLoad II/ RCU II Explosion Proof Lite (EXL) Installation Guide - Part # 6070
RS485 2-Wire, Host to a Single MultiLoad II/ RCU II
MultiLoad II/
RCU II #1 COM
RDA
RDB
TDA
TDB
RS485 4-Wire, Host to Multiple MultiLoad II/ RCU IIs
MultiLoad II/
RCU II COM 1
RDA
RDB
TDA
TDB
MultiLoad II/ RCU
II #n COM 1
RDA
RDB
TDA
TDB