CHAPTER 4– DATA COMMUNICATIONS INTERFACE
28 MultiLoad II/ RCU II Explosion Proof Lite (EXL) Installation Guide - Part # 6070
Host/TMS Communications
A host/ TMS computer system can be connected to the MultiLoad II/ RCU II in various ways :
- RS485 4-wire on COM 1
- RS485 2-wire on COM1
- RS232 on COM1
- Ethernet on the ethernet port
4.2.2.1 COM 1 - RS-485 4-wire - Host/TMS Communications
A host/ TMS computer system can be connected to the MultiLoad II/ RCU II via RS485 4-wire on
COM 1.
The TD and RD pairs are swapped at the Host/TMS.
Figure 4.2 RS485 4-Wire, Host to a Single MultiLoad II/ RCU II (recommended)
MultiLoad II/RCUII can be multridropped on the same communication line using a RS485 – 4 Wire
on COM 1 to communicate to a host system.
Figure 4.3 RS485 4-Wire, Host to Multiple MultiLoad II/ RCU IIs
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