Locomotive Control Systems 31.200

1 The Hubbell Intelligent Radio Loco- 31200. Brochure 31200. motive Systems features a micro- November 1996. New computer with status Microprocessor Radio Locomotive Control display and built-in di- agnostics along with our high speed, digi- tal, biphase modula- tion to provide reli- able, efficient and economical operation of diesel-electric loco- motives from a por- table transmitter. Receiver Cabinet By operating the transmitter switches, a radio mes- sage is sent to the Locomotive mounted receiver to Control the di- rection and speed of the locomo- tive. Additional data bits are avail- able to perform special auxiliary functions such as sounding of horn, application of brakes or Control of Hubbell 72 & 450 MHz Remote Control System for Locomotive Applications couplers. Each radio Control system operates on a licensed frequency in the 72 . 76 MHz or the 450 470 MHz bands.

2 The receiver is crystal con- trolled. A synthesized 72 76 MHz receiver is also available. Pneumatics Cabinet Benefits Easy to Maintain Self diagnos- tics identify problem areas via the status display. Fast Response High Speed data rate offers fast, responsive operation. Frequency Conservation Up to four Systems can share the same radio frequency, which also saves on spare parts requirements. Cost Reduction Operating crew is reduced on each shift. Payback is realized in just a few months. Better Visibility Remote Control takes the operator out of the cab providing him with improved visibil- Midsize Transmitter ity and total Control from grade level. (See Spec 31110). Simple Operation Portable, lightweight transmitter is easier to HUBBELL. operate than manual controls. System Features Features watchdog circuit, the solid state relays and the pneu- Electro-Mechanical Relays Secure Control Hubbell's biphase data transmis- Microcomputer matic functions are contin- Electro-Mechanical Relays sion scheme and Cyclic Redundency Check code uously monitored.

3 Any op- Hubbell's system uses a are used to Control loco- (CRC) prevent false motions and provides for con- erational, communications single board micro com- motive direction, throttle, trolled shutdowns. Digital messages are checked for or run mode faults will puter which converts the head lamps, and Lintern address, format, and content before any motion or shutdown the Locomotive , biphase data from the ra- lights. The Lintern lights function is activated. While in motion, check circuits apply the brakes, and dis- dio receiver, decodes and provide operations status continuously monitor the received message and the play a fault code. verifies the message by information for the remote quality of the RF carrier signal. Any error or loss of sig- checking for errors. The Input/ output Board operator. nal integrity will de-energize all controlled functions computer generates the and apply the brakes.

4 The l/O board accepts Sensing Boards Control outputs to the l/O. the Control outputs from the Frequency Conservation It is possible to have sev- interface boards. The ad- Each sensing board moni- microcomputer and con- eral transmitters operating in the same area, on the dress and message time tors up to eight solid state verts them into driving out- same frequency, with practically no interference be- interval is user program- relay outputs and/or pres- puts for the solid state re- cause of different transmission rates for each transmit- mable. A hardware sure switches. This pro- lays. The l/O board also ter. The unique address code of each transmitter and watchdog timer monitors vides complete feedback accepts input from the sol- receiver assures that only the matching receiver re- the program operation to the micro on relay and id state relays feedback sponds to the radio commands.

5 All other signals on and resets the processor if pressure switch status. circuits and provides this the same frequency are ignored. the program fails to exe- information to the controller Receiver Cabinet cute properly. QSR Design Hubbell's Quality, Serviceable, Reli- for diagnostic purposes. able product design philosophy is evident with the Lo- On-Board Diagnostics The electronics cabinet is Emergency Stop Board of NEMA 12 construction comotive Control System. Protective circuits are em- The computer board em- and houses the power ployed to prevent transients or extreme voltage fluctua- The Emergency Stop ploys continuous diagnos- supply, the radio receiver, tions from damaging components. The modular, solid board monitors the Emer- tics. System status is dis- digital decoding logic state design, housed in NEMA 12 enclosures, pro- gency Stop pushbuttons played on a two digit al- cards, solid state drivers vides reliable operation and long service life under mounted in the locomo- pha numeric display.

6 And the output relays. the most rugged and extreme conditions. Spares re- tive, the main air reservoir Upon power-up, the initial- quirements are significantly reduced by virtue of the pressure, oil pressure, and The receiver, digital logic ization test checks the I/O. shared frequency capability and modular design. coolant water tempera- decoding circuits and the boards, internal random ture. If any of these func- solid state drivers plug Efficient and Flexible The high speed data trans- access memory (RAM), the tions are abnormal, a sig- into common card cag- mission technique provides faster and thereby more motion controlling solid nal is given to the micro to es. Edgemounted LED's responsive operation. A lightweight, durable plastic state relays, and the pneu- shut down the Locomotive on the circuit boards sim- transmitter is comfortable and easy to operate.

7 A matic system. and apply the brakes. plify system troubleshoot- manual/remote transfer switch can be provided for When a fault is detected, ing and maintenance isolation between the manual and remote Control DC Solid State output the computer will stop the tasks. All modules are re- components. Locomotive and the error Each solid state relay movable from the front Security of the received signal and any resulting con- will be displayed. The board has eight circuits to and the card cage is trol actions are safeguarded as follows: fault must be corrected drive the 24 VDC interfac- hinged to provide access before operation can ing relays and solenoid to backplane wiring. The received signal must be of the proper continue. valves to Control the loco- frequency. Solid state drivers or out- motive functions. After initialization, the put relays operate the lo- The received message must have the proper ad- dress and must be in the correct format.

8 The receiver calculated CRC code must be identi- cal to the CRC code calculated by the transmitter and sent as part of each message. The preceding items must be met and all transmitter lever switches must be centered before the locomo- tive can be activated and the brakes released. To continue or change an energized function, re- quires the receipt of a valid message prior to time-out of the message timer (2 sec). If no valid message is received, the system turns all outputs off and applies the brakes. Two separate watchdog timers assure that all outputs are switched off in case of a receiver malfunction. comotive magnetics and Pneumatic Cabinet pneumatic Systems in re- Specifications The pneumatics enclosure sponse to decoded Control Supply Voltage .. 12 VDC, 24 VDC, 36 VDC or 72 VDC. is of NEMA 12 construc- commands. The configura- tion and houses the pneu- Internal Power Requirements.

9 + & + tion of the manual Control matic controls for the re- switches is duplicated and Operating Temperature .. 22 F ( 30 C) to 140 F (+60 C). mote operation of the lo- wired to industrially rated comotive. The Locomotive Radio Receiver terminals for interconnec- throttle, independent tion to the Locomotive con- Frequency Range .. 72 76 MHz or 450 470 MHz brakes, and the train line trols. A manual-remote brakes are normally oper- Channel Availability .. as required by user transfer switch is provided ated via binary pneumatic to completely isolate the Frequency Stability .. 5 ppm valves for Control of the air radio system from the man- Sensitivity .. 1 v @ 20 dB quieting pressure. Other functions ual controllers. and the horn are con- Data Reception .. compatible with existing transmitters The receiver antenna is trolled by solenoid valves. normally mounted on the This cabinet also contains Modulation.

10 Biphase Locomotive cab, and suffi- the pressure switches for Baud Rate .. 4800 bps cient co-axial cable is pro- main air, independent Message Format .. preamble, sync pattern, start flag, address, Control , CRC. vided to connect the an- brakes air, train line check code tenna to the radio receiver brakes air, and throttle air. module in the cabinet. Control Section Single board computer consisting of 80C31BH controller, 64k EPROM, EPLD containing cir- cuits for message synchronizing, and processor watchdog Hubbell Offers Switches .. 8 position address dip, 4 position message timer dip Indicators .. 2 digit display (7 segment LED) for self diagnostics & error Factory Assembled the transmitter, receiver, conditions and pneumatics cabinets are completely as- sembled and wired at the Hubbell factory. Firmware .. written in 8031 assembly language structured for ease of customization of output Control System Test the entire system is tested for a Functions.