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.

RS232 Interface Option ("D")

An optional plug-in board makes any 2000 unit capable of bidirectional point-to-point serial communications.  The instrument can then be programmed by a computer, output data to a computer at standard baud rates from 300 through 19200 (as shown in the figure below), or drive another digital device with an RS232 interface (a panel-mount printer, remote display, etc.).

Normally, there can be only one conditioner or counter meter per RS232 line, as in the figure below.  However, multiple Remote Displays can be connected to a single RS232 line in multidrop fashion.

RS232 communications are full duplex only.  The RS232 Request-to-Send (RTS) line can be set to a latched mode, where a single reading is transmitted when the line is taken high (this allows a single data transfer to be commanded by a device other than a computer).


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