Brooks, Digital mfc's and mfm's – Brooks Instrument SLAMf Series User Manual

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Section 2 - Installation

Installation and Operation Manual

X-TMF-SLAMf-MFC-eng

Part Number: 541B032AAG

April, 2013

Brooks

Digital MFC's and MFM's

The RS-485 is a multidrop connection and allows a maximum of 32
devices to be connected to a computer system. IBM-ompatible PCs are not
equipped with RS-485 ports as standard. An RS-232 to RS-485 converter
or RS-485 interface board is therefore required to connect an RS-485 to a
standard PC. Figure 2-5 is an interconnection diagram showing two TMFs
linked to an IBM-compatible PC, via RS-485 and

RS-485 to RS-232

converter. The RS-485 bus, a daisy-chain network, meaning that the wires
are connected at the units as in Figure 2-5.

Figure 2-5 RS-485 Multidrop Interconnection TMFs and PC