Short-Range Modem Pair. Please read this manual thoroughly before using your instrument. For customer support, or to place an order, call Spectrum Technologies, Inc. at (800)248-8873 or (815) 436-4440 between 7:30 am and 5:30 p.m. CST, FAX at (815)436-4460, or E-Mail at info@specmeters.com.
General Overview The short-range modem pair will allow you to ex- tend the range of your WatchDog Weather Station up to 4000 ft. Because the station is hardwired to your computer, it is not necessary to have a line of sight with the station.
Cable Connection The twisted-pair cable should be connected to the two convert- ers and the A/C adaptor as shown in figure 1. IMPORTANT: the wire connected to a Transmit Data terminal [TD(A) or TD(B)] of one converter must be connected to the corresponding Receive Data terminal [RD(A) or RD(B)] of the other converter.
Connecting to the Computer Before powering the short-range modem pair with the A/C adaptor, check that the jumper clip on the RS232-RS485 converter is in the Echo-On position as shown in figure 2. Jumper Clip Echo Pins Figure 2: Top view of Echo On/Off switch The 9-pin female connector of the RS232-RS485 converter connects to the computer data port.
Connecting to Weather Station The 9-pin male connector of the short-range modem adaptor is attached to the 3349CB RS422 converter. The modular connector snaps into the auxiliary port (Aux) of the weather station. Secure the twisted-pair cable into the notch in the right-most hole and snap the cap over the hole.
This product is warranted to be free from defects in material or workmanship for one year from the date of pur- chase. During the warranty period Spectrum will, at its op- tion, either repair or replace products that prove to be de- fective.
12360 S. Industrial Dr. East Plainfield, IL 60585 (800) 248-8873 or (815) 436-4440 FAX: (815) 436-4460 E-Mail: info@specmeters.com www.specmeters.com Rev. 05/2012...