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Teledyne API - Model 200EH/EM Operation Manual Optional Hardware and Software
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5.9.2. RS-232 MULTIDROP (OPT 62)
The multidrop option is used with any of the RS-232 serial ports to enable communications of up to eight
analyzers with the host computer over a chain of RS-232 cables via the instruments COM1 Port. It is subject to
the distance limitations of the RS 232 standard.
The option consists of a small printed circuit assembly, which is plugs into to the analyzer’s CPU card (see
Figure 5-10) and is connected to the RS-232 and COM2 DB9 connectors on the instrument’s back panel via a
cable to the motherboard. One option 62 is required for each analyzer along with one 6’ straight-through, DB9
male DB9 Female cable (P/N WR0000101).
This option can be installed in conjunction with the Ethernet option (Option 63) allowing the instrument to
communicate on both types of networks simultaneously. For more information on using and setting up this
option see Section 6.11.7)
Rear Panel
(as seen from inside)
CPU Card
Multidrop
Card
Figure 5-10: M200EH/EM Multidrop Card
5.9.3. ETHERNET (OPT 63)
The Ethernet option allows the analyzer to be connected to any Ethernet local area network (LAN) running
TCP/IP. The local area network must have routers capable of operating at 10BaseT. If Internet access is
available through the LAN, this option also allows communication with the instrument over the public Internet.
When installed, this option is electronically connected to the instrument’s COM2 serial port making that port no
longer available for RS-232/RS-485 communications through the COM2 connector on the rear panel. The
option consists of a Teledyne Instruments designed Ethernet card (see Figure 5-11), which is mechanically
attached to the instrument’s rear panel (see Figure 5-12). A 7-foot long CAT-5 network cable, terminated at both
ends with standard RJ-45 connectors, is included as well. Maximum communication speed is limited by the RS-
232 port to 115.2 kBaud.
04521C (DCN5731)