Hubbell 31200 brochure Specifications, Hubbell Offers

comotive magnetics and pneumatic systems in re- sponse to decoded control commands. The configura- tion of the manual control switches is duplicated and wired to industrially rated terminals for interconnec- tion to the locomotive con- trols. A manual-remote transfer switch is provided to completely isolate the radio system from the man- ual controllers.

The receiver antenna is normally mounted on the locomotive cab, and suffi- cient co-axial cable is pro- vided to connect the an- tenna to the radio receiver module in the cabinet.

Pneumatic Cabinet

The pneumatics enclosure is of NEMA 12 construc- tion and houses the pneu- matic controls for the re- mote operation of the lo- comotive. The locomotive throttle, independent brakes, and the train line brakes are normally oper- ated via binary pneumatic valves for control of the air pressure. Other functions and the horn are con- trolled by solenoid valves. This cabinet also contains the pressure switches for main air, independent brakes air, train line brakes air, and throttle air.

Specifications

Supply Voltage	12VDC, 24VDC, 36VDC or 72VDC
Internal Power Requirements	+11.9–13.1VDC & +4.5–6.5VDC
Operating Temperature	–22°F (–30°C) to 140°F (+60°C)

Radio Receiver

Frequency Range	72–76 MHz or 450–470 MHz
Channel Availability	as required by user
Frequency Stability	±5 ppm
Sensitivity	1 µv @ 20 dB quieting
Data Reception	compatible with existing transmitters
Modulation	biphase
Baud Rate	4800 bps
Message Format	preamble, sync pattern, start flag, address, control, CRC
	check code

Control Section

Single board computer consisting of 80C31BH controller, 64k EPROM, EPLD containing cir- cuits for message synchronizing, and processor watchdog

Hubbell Offers

•Factory Assembled — the transmitter, receiver, and pneumatics cabinets are completely as- sembled and wired at the Hubbell factory.

•System Test — the entire system is tested for a minimum of 48 hours prior to shipment.

•Installation and Commissioning — Installation is accomplished quickly. Transfer switch is pre-wired and labeled, interconnecting termi- nals are provided to simplify installation. A Hubbell field engineer can be contracted for installation and final check-out.

•Customer Support — Hubbell provides a complete documentation package including drawings, operating manuals, service manu- als, spare parts, training and experienced field service engineers.

Switches	8 position address dip, 4 position message timer dip
Indicators	2 digit display (7 segment LED) for self diagnostics & error
	conditions
Firmware	written in 8031 assembly language structured for ease of
	customization of output control
Functions	message input address decoding, error checking, control
	bit decoding, output control self diagnosis
Paralleled I/O	basic system uses single board, up to three additional
	boards may be added
Output per board	48 software programmable for input or output with
	readback on all outputs
Driver per output	TTL compatible for up to 25mA sink

DC Output Section

Solid state relay PC boards in card cage.

Type	Opto Isolated
Indicators	Red: output activated
Output Voltage	24VDC
Input Voltage	4.5–6.5Vdc, active high
Load	0.5A, 24VDC, inductive
Isolation	1500V

Input Board

Input 24 VDC sensing PC board in card cage.

Indicator	Red: input activated
Input	24VDC nominal
Isolation	1500V input to output & between circuits
Output	Opto-isolated; active low

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