Hubbell 31200 User Manual

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The Hubbell Intelligent Radio Locomotive Systems features a microcomputer with status

display and built-indiagnostics along with our high speed, digital, biphase modulation to provide reliable, efficient and economical operation ofdiesel-electriclocomotives from a portable 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

 

couplers.

 

Each radio control system operates

 

on a licensed frequency in the 72–

 

76 MHz or the 450–470MHz

 

bands. The receiver is crystal con-

 

trolled. A synthesized 72–76MHz

 

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

 

operate than manual controls.

 

31200

Brochure 31200 November 1996 New

Hubbell 72 & 450 MHz Remote Control System for Locomotive Applications

Microprocessor Radio Locomotive Control

HUBBELL

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-energizeall 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, Reliable 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 address and must be in the correct format.

The receiver calculated CRC code must be identical 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, requires the receipt of a “valid message” prior to time-outof 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.

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-BoardDiagnostics

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-MechanicalRelays 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-

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-remotetransfer 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-axialcable is provided to connect the antenna to the radio receiver module in the cabinet.

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.

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-wiredand labeled, interconnecting terminals are provided to simplify installation. A Hubbell field engineer can be contracted for installation and finalcheck-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 ......................

72–76MHz or450–470MHz

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

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 Type 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 Voltage Power Supply Panel

13.Transfer Switch Local/Radio

14.Pressure Switch

15.Pressure Gauge

16.Terminal Boards

17.Air Cutoff Valve

18.Binair Valve

19.Pneumatic Valves

20.NEMA Type 12 Pneumatics Cabinet

Pneumatic Power Pack

 

Microprocessor Locomotive Control

24.00"

1.16"

12.00"

24.00"

1.16"

12.00"

30.00"

 

 

24.00"

 

 

 

 

 

 

 

 

Hubbell Industrial Controls, Inc.

HUBBELL 4301 Cheyenne Drive • Archdale, NC 27263

a subsidiary of Hubbell Incorporated

50 Edwards Street, Madison, Ohio 44057

(336) 434-2800• Fax (336)434-2801

Telephone (440) 428-1161• FAX (440)428-7635

 

 

 

 

JPS-1196-.5M© 1996

 

Printed in U.S.A.