For both the "D" and "E" options, serial communication are via a 4- or 6-conductor phone cable that plugs into a standard RJ-11 phone jack on the rear of the serial interface board  Both RS232 and RS485 interfaces are isolated from meter and power grounds.

The information transmitted via RS232 or RS485 includes the latest signal value (filtered or unfiltered), peak signal value, and alarm values and status.  Using the optional RS232 or RS485 interface, a 2000 Series meter can serve as a Remote Display for an external device or for another 2000 instrument.

With either option, 2000 Series Setup Software is available free of charge that simplifies the logging of measurement data on the computer and allows remote setup of the 2000 Series instrument via the computer, without having to use the front-panel push buttons.

RS485 Interface Option ("E")

An optional plug-in board makes any 2000 unit capable of bidirectional multidrop communications, where each device has its own unique digital address.  Up to 31 addresses are provided for, so that multiple 2000 instruments can be addressed and transmit on the same data line.

In general, the use of RS485 lines maximizes the utilization of computer ports and simplifies plant wiring.  As opposed to RS232 cabling, it uses only two pairs of balanced lines, which allows long cable runs (up to one mile) in electrically noisy environments.

Data rates are selectable from 300 through 19200 baud.  In the case of a long line length, the RS485 board at the end of the line can be terminated by a jumper-selectable 120-ohm resistor to minimize signal reflections.  The RS485 option offers both full duplex mode (with separate wire pairs for "Transmit" and "Receive") and half-duplex mode (with shared "Transmit" and "Receive").


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