The COM100 was retired because most cellular service providers converted their systems from analog service to digital service. The COM100 Analog Cellular Phone Package consisted of a data transceiver with modem adapter, power switching relay, and 10 feet of antenna cable. A COM210 or COM310 modem was purchased separately based on the application's requirements. Transmission rate was limited to 4800 bps.
Motorola AMPS "Bag Phone"
|Operating Temperature||-30° to +60°C|
|Average Current Drain||
|Supply Voltage||10 to 16 Vdc|
|RF Power Output||3 W (nominal)|
|Transmission Rate||4800 bps|
Control Relay Crydom D0061B
|Control Voltage||1.7 to 9 Vdc|
|Control Current||15 mA (@ 5 Vdc)|
*Although the CR9000X and CR9000 are compatible, the COM100 does not support their fastest communication rates, and is therefore not practical for most of their applications.
A power cable with an internal relay (#13360) switched power to the COM100 at specific times as controlled by the datalogger program, thus conserving system power. Where pre-determined call intervals were short and infrequent (e.g., 10 minutes per day), the system can be powered by the PS12LA or sealed rechargeable batteries supplemented by a charging source (ac power or solar panel).
For longer calls or more frequent time intervals (e.g., 10 minutes every hour), a deep-cycle battery trickle-charged by a ac power or a solar panel could power the system (e.g., BP12 or BP24 battery and an SP20 solar panel).
When communication between the datalogger and the computer needed to be continuously available, the relay was not used and ac power was required.
The COM100 required a desiccated, non-condensing environment; a Campbell Scientific enclosure was recommended. A bracket, velcro strap, grommets, and screws were provided to attach the COM100 to the backplate of our enclosures.
Campbell Scientific software, namely LoggerNet or PC208W, supported use of the COM100 with our dataloggers. The software supported automated error-checking, scheduled contact times, or user-initiated contacts. Our software could run unattended allowing the user to take advantage of lower off-hour telephone rates.