User's Manual

TRAIN CHIEF® II LRCS w/Lightweight OCU OWNER’S MANUAL

95-00-0-xxx Rev 000 6-1 Control Chief Corporation

6 DETAILED EQUIPMENT DESCRIPTIONS

Lightweight OCU Features

The Train Chief® II LRCS receiver/controller unit and Lightweight OCU operate with the

Advanced Universal Transmitter system that allows the assignment of a given OCU to a specific

locomotive. The OCU assignment system will allow any OCU to be assigned to any locomotive,

with identical controls and configuration. This system provides an extensive degree of flexibility

for any given equipment set. The Advanced Universal Transmitter incorporates an additional

level of communication security to ensure that only authorized and authenticated (properly

assigned) OCUs will work with locomotives within the designated group.

Figure 6-1

Operational Description

¾ Each receiver / controller unit (located in the locomotive) has a unique hard coded

identification code and (within a group of locomotives) a discrete radio frequency.

¾ Each OCU has a unique identification code and is radio frequency agile to operate on

any of the locomotive group’s frequencies.

¾ The OCU and locomotive are field configured to operate together by using the OCU

assignment procedure.

¾ OCU assignment is accomplished through a duplex infra-red link that exchanges

information (data) between the receiver / controller unit and the OCU. The receiver /

controller locomotive’s ID code and operating frequency and the OCU’s ID code are

exchanged during this process. Once completed, the specific OCU is assigned to that

specific locomotive and RF communication and remote control operations can

commence over the radio link.

¾ Since both the locomotive and OCU have exchanged their unique identities, the OCU

can only communicate with its assigned locomotive. If an attempt is made to assign the

OCU to another locomotive, the assignment process will re-write the locomotive’s data in

the OCU memory, disabling RF communication to the previous locomotive.

¾ Since the locomotive receiver and OCU trade their unique identities they are then paired

to the exclusion of other nearby OCU s and receivers until power is removed or a re-

assignment occurs.

IR Port