Comm-Tronix

COMM-TRONIX TELEMETRY SYSTEM

The Comm-Tronix MB-2000 is a modular system custom configured to meet the specific needs of each location. It consists of: a motherboard with up to eight plug-in slots, a separate surge protected power supply, 8 bit microprocessor based central processing unit (CPU), positive & negative voltage regulator, and as each location requires, one or more input and output cards. This collection of cards called a UNIT is housed in one or more NEMA rated enclosure(s). The user interface to the UNIT is through a twelve-button keypad and liquid crystal display (LCD). The communication link between units is accomplished using Dual Tone Frequency Modulated (DTMF) encoding. This sequence of audio tones (identical to a telephone tone dialing) is transmitted via UHF or VHF frequencies on a mobile communications radio. The antennas are usually of the directional Yagi type.

General Specifications

Operating temperature: -35 to +50 c LCD operating temperature: 0 to +50 c System accuracy: 8 bit resolution Power consumption: < 10 watts

Data protocol: DTMF (dual tone modulated frequency) Display: LCD 2x20 characters

Data entry: 12 button keypad

Circuit construction: modular utilizing an 8-slot backplane

Inputs: each backplane

2 analog, tower level, flow, chlorine level

16 digital: alarms pump confirmation, and remote control

Outputs: each backplane

12 analogs: chart recorders, led meters, and Vfd’s

16 digital: pumps, electric valves, and indicator lights Note: a maximum of 16 I/O per backplane Programmable items

Transmit interval 0-25 minutes LOS (loss of signal) 0-25 minutes PL (pump lockout) 0-25 minutes

NOD (no deviation) 0-255 signal receptions.

Technical Specifications

The MB-2000 system circuit boards are of .062 thicknesses Mil Spec FR4 rated fiberglass. The boards have an environmentally protective epoxy mask with a silk-screen overlay used for identification of components during troubleshooting. All modular plug-in boards have their fingers coated with nickel and then a gold flash applied to prevent corrosion. The edge card connectors on the motherboard are gold plated so that no electrolysis will occur. All wire-to-board connections on all circuit boards are of the EURO type pc mount meeting specification VDE0ll0. The connectors are manufactured from a thermoplastic material meeting UL 94V-O and in addition are listed with the Underwriters Laboratory (file #E54800). All connectors will accept at least a minimum of 14 AWG wire or larger. Individual components on all boards meet industrial temperature ratings with the exception of the LCD display (0-50 degree C). Resistors are MIL R rated and in addition are oversized to prevent heat/stress related failures. All capacitors are Mylar film or low ESR/ESL 105 degree C electrolyte for superior stability over time and temperature.