Thermo Scientific Micro-Tech 9101, Reference Manual

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Thermo Fisher Scientific Micro-Tech 9101/9201 Reference Manual, Rev J C-1
Appendix C
Communication Protocols
There are two communication ports on the Micro-Tech motherboard.
Comm A is a RS232C/RS-485 (jumper selectable), isolated. Comm B is a
RS-485 only, non-isolated.

RS423/RS232C—For point-to-point asynchronous bidirectional
communications, maximum 50 feet (15 m). Modem capability.

RS485/RS422—For point-to-point or multi-drop 4-wire bi-directional
communications, maximum 4,000 feet (1,200 m).
One additional communication board may be installed, as described later in
this appendix.