Hubbell 31200 User Manual

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The Hubbell Intelligent Radio Loco­motive Systems features a micro­computer with status display and built-in di­agnostics along with our high speed, digi­tal, biphase modula­tion to provide reli­able, efficient and economical operation of diesel-electric loco­motives from a por­table transmitter.
By operating the transmitter switches, a radio mes­sage is sent to the locomotive mounted receiver to control the di­rection and speed of the locomo­tive. Additional data bits are avail­able to perform special auxiliary functions such as sounding of horn, application of brakes or control of couplers.
31200
Brochure 31200 November 1996
New
Receiver Cabinet
Each radio control system operates on a licensed frequency in the 72– 76 MHz or the 450–470 MHz bands. The receiver is crystal con­trolled. A synthesized 72–76 MHz receiver is also available.
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 visibil­ity and total control from grade level.
Simple Operation — Portable,
lightweight transmitter is easier to operate than manual controls.
Pneumatics Cabinet
Midsize Transmitter
(See Spec 31110)
Hubbell 72 & 450 MHz Remote Control System for Locomotive Applications
M icroprocessor Radi o Locomotiv e Control
HUBBELL
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System Features
Secure Control — Hubbell’s biphase data transmis­sion scheme and Cyclic Redundency Check code (CRC) prevent false motions and provides for con­trolled shutdowns. Digital messages are checked for address, format, and content before any motion or function is activated. While in motion, check circuits continuously monitor the received message and the quality of the RF carrier signal. Any error or loss of sig­nal integrity will de-energize all controlled functions and apply the brakes.
Frequency Conservation — It is possible to have sev­eral transmitters operating in the same area, on the same frequency, with practically no interference be­cause of different transmission rates for each transmit­ter. The unique address code of each transmitter and receiver assures that only the matching receiver re­sponds to the radio commands. All other signals on the same frequency are ignored.
“QSR” Design — Hubbell’s Quality, Serviceable, Reli- able product design philosophy is evident with the Lo­comotive Control System. Protective circuits are em­ployed to prevent transients or extreme voltage fluctua­tions from damaging components. The modular, solid state design, housed in NEMA 12 enclosures, pro­vides reliable operation and long service life under the most rugged and extreme conditions. Spares re­quirements are significantly reduced by virtue of the shared frequency capability and modular design.
Efficient and Flexible — The high speed data trans­mission technique provides faster and thereby more responsive operation. A lightweight, durable plastic transmitter is comfortable and easy to operate. A manual/remote transfer switch can be provided for isolation between the manual and remote control components.
Security of the received signal and any resulting con­trol actions are safeguarded as follows:
The received signal must be of the proper
frequency.
The received message must have the proper ad-
dress and must be in the correct format.
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 locomo­tive 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.
Features
Microcomputer
Hubbell’s system uses a single board micro com­puter which converts the biphase data from the ra­dio receiver, decodes and verifies the message by checking for errors. The computer generates the control outputs to the l/O interface boards. The ad­dress and message time interval is user program­mable. A hardware watchdog timer monitors the program operation and resets the processor if the program fails to exe­cute properly .
On-Board Diagnostics
The computer board em­ploys continuous diagnos­tics. System status is dis­played on a two digit al­pha numeric display . Upon power-up, the initial­ization test checks the I/O boards, internal random access memory (RAM), the motion controlling solid state relays, and the pneu­matic system.
When a fault is detected, the computer will stop the locomotive and the error will be displayed. The fault must be corrected before operation can continue.
After initialization, the
watchdog circuit, the solid state relays and the pneu­matic functions are contin­uously monitored. Any op­erational, communications or run mode faults will shutdown the locomotive, apply the brakes, and dis­play a fault code.
Input/Output Board
The l/O board accepts the control outputs from the microcomputer and con­verts them into driving out­puts for the solid state re­lays. The l/O board also accepts input from the sol­id state relays feedback circuits and provides this information to the controller for diagnostic purposes.
Emergency Stop Board
The Emergency Stop board monitors the Emer­gency Stop pushbuttons mounted in the locomo­tive, the main air reservoir pressure, oil pressure, and coolant water tempera­ture. If any of these func­tions are abnormal, a sig­nal is given to the micro to shut down the locomotive and apply the brakes.
DC Solid State Output
Each solid state relay board has eight circuits to drive the 24VDC interfac­ing relays and solenoid valves to control the loco­motive functions.
Electro-Mechanical Relays
Electro-Mechanical Relays are used to control loco­motive direction, throttle, head lamps, and Lintern lights. The Lintern lights provide operations status information for the remote operator.
Sensing Boards
Each sensing board moni­tors up to eight solid state relay outputs and/or pres­sure switches. This pro­vides complete feedback to the micro on relay and pressure switch status.
Receiver Cabinet
The electronics cabinet is of NEMA 12 construction and houses the power supply , the radio receiver, digital decoding logic cards, solid state drivers and the output relays.
The receiver, digital logic decoding circuits and the solid state drivers plug into common card cag­es. Edgemounted LED’s on the circuit boards sim­plify system troubleshoot­ing and maintenance tasks. All modules are re­movable from the front and the card cage is hinged to provide access to backplane wiring.
Solid state drivers or out­put relays operate the lo-
Two separate “watchdog timers” assure that all
outputs are switched off in case of a receiver malfunction.
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comotive magnetics and pneumatic systems in re­sponse to decoded control commands. The configura­tion of the manual control switches is duplicated and wired to industrially rated terminals for interconnec­tion to the locomotive con­trols. A manual-remote transfer switch is provided to completely isolate the radio system from the man­ual controllers.
The receiver antenna is normally mounted on the locomotive cab, and suffi­cient co-axial cable is pro­vided to connect the an­tenna to the radio receiver
Pneumatic Cabinet
The pneumatics enclosure is of NEMA 12 construc­tion and houses the pneu­matic controls for the re­mote operation of the lo­comotive. The locomotive throttle, independent brakes, and the train line brakes are normally oper­ated via binary pneumatic valves for control of the air pressure. Other functions and the horn are con­trolled by solenoid valves. This cabinet also contains the pressure switches for main air, independent brakes air, train line brakes air, and throttle air.
module in the cabinet.
Hubbell Offers
Factory Assembled — the transmitter, receiver,
and pneumatics cabinets are completely as­sembled 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 termi­nals 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 manu­als, spare parts, training and experienced field service engineers.
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 cir­cuits for message synchronizing, and processor watchdog
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
HUBBELL
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Key Components
Crane mounted NEMA 12 receiver cabinet with power converter, radio receiver, mi­cro controller board, Input/ Output board and solid state output relays.
1. NEMA T ype 12 Receiver Cabinet
2. Radio/Micro Card Cage
3. Micro Controller Card with two digit display .
4. Input/Output Card
5. RF Receiver Module
6. IF Receiver Board
7. Data Demodulator
Board
8. Solid State Relay Board
9. Fuse Blocks
10. Relay Panel
11. Terminal Blocks for
Interconnection
12. Low V oltage Power Supply Panel
13. T ransfer Switch Local/Radio
14. Pressure Switch
15. Pressure Gauge
16. Terminal Boards
17. Air Cutoff Valve
18. Binair V alve
19. Pneumatic Valves
20. NEMA T ype 12
Pneumatics Cabinet
Microprocessor Locomotive ControlPneumatic Power Pack
HUBBELL
JPS-1196-.5M © 1996 Printed in U.S.A.
24.00" 12.00"1.16"
30.00"
4301 Cheyenne Drive • Archdale, NC 27263 (336) 434-2800 • Fax (336) 434-2801
24.00" 12.00"1.16"
24.00"
Hubbell Industrial Controls, Inc.
a subsidiary of Hubbell Incorporated
50 Edwards Street, Madison, Ohio 44057
Telephone (440) 428-1161 • FAX (440) 428-7635
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