RETIRED ›
This product is no longer available and has been replaced by: COM220. Some accessories, replacement parts, or services may still be available.

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Overview

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.

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Detailed Description

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 datalogger 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.

Specifications

Standards Bell 212A, CCITT V.22, V.32bis
FCC Registration B9QUSA-31402-MM-T
Operating Voltage 12 Vdc
Active Current Drain 140 mA
Quiescent Current Drain 100 μA
Baud Rate 300, 1200, 4800, 9600 bps
Operation Full-duplex over standard phone lines
Standard Operating Temperature Range -25° to +50°C
Extended Operating Temperature Range -55° to +80°C
Dimensions 13.2 x 4.3 x 9.1 cm (5.2 x 1.7 3.6 in.)
Weight 0.27 kg (9.5 oz)

Compatibility

Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR9000X

Compatible Retired Dataloggers

CR500 CR510 CR10 CR10X 21X CR23X CR9000 CR5000 CR7X

Power Supply

The COM200 required 12 Vdc power on the 8th pin of the CS I/O port. It can receive this power through several methods:

(1) Dataloggers—contemporary models automatically supply 12 V on pin 8. The table below shows whether or not older products included 12 V on pin 8.

12 V on pin 8 Product Description

yes

CR10X wiring panel (black panel with green terminal blocks)

no

CR10WP Wiring Panels (black panel with gray terminal
strips, not green) used with CR10s and CR10Xs

no

all CR10 silver wiring panels

yes

CR23X

yes

21X with serial numbers >13,443

no

21X with serial numbers < 13,443

yes

CR500 with serial numbers >1765

no

CR500 with serial numbers < 1765

yes

700X with serial numbers >2779

no

700X with serial numbers < 2779


(2) COM200—models with serial number 2334 or higher came with a green power connector on the side next to the phone jack. The 12 V and GND terminals from the datalogger were attached directly to the 12 V and GND terminals on the connector. The user needed to supply wires.

(3) Null modems—all contemporary models automatically supply 12 V on pin 8. The table below shows whether or not older products included 12 V on pin 8.

12 V on pin 8 Product Description

yes

PS512M with serial numbers >1712

no

PS512M with serial numbers < 1712

yes

CH512R with serial numbers >1075

no

CH512R with serial numbers < 1075

yes

DSP4 with serial numbers >2221

no

DSP4 with serial numbers < 2221