COM200

The COM200 was designed for remote use in field applications. It provided low power usage in both active and quiescent modes, and a wide operating temperature range.

The COM200 was designed for remote use in field applications. The COM200 was similar to its predecessor, the DC112, in compatibility and operation but supported data transfer rates of 9600, 1200, and 300 bps between data logger and PC.

COM200 History

Serial numbers greater than or equal to 2989 (shipped before or on 20 November 1998) included a dry circuit instead of a wet circuit. This was the last hardware step in cleaning up the communications link for troubled sites. If someone has a COM200 with a serial number less than 2989, that does not mean it is “bad” and needs to come in for repair.

Serial Numbers from 2464 to 2988 (shipped from 14 July 1998 to 19 November 1998) used a new Midcom transformer (CSI p/n 12023). This only helped communication problems in the few cases where there is a poor quality line. When a COM200 comes in under an RMA (for any reason) that has a serial number less than 2464, we replace the old Tamura transformer at no charge. When we do this, the serial number sticker will be changed. It will have the same serial number as before, but the suffix “-MOD” will be added to it. For example, 1060 will be changed to 1060-MOD.

Serial Number greater than or equal to 2344 came with a green power connector that allowed the user to connect the 12 V and GND to the phone modem without using the Power Adapter, p/n 10704.