TECNORD
RC-DBX/PCM/NBM
Use and Maintenance Manual
Page
11/23
4
OPERATION
4.1
The radio transmission and servicing system
Tecnord’s RC-DBX ,RC-PCM and RC-NBM Radio Control Systems allow for the operating machines to be controlled in general by
means of electro-magnetic waves. It is made up of a portable transmitter unit (SHW ,PCJ TX or NBJ-TX) held by the operator and of a
receiver unit (DBX-RX) that is usually installed on the machine to be controlled.
Each function originated from several devices or control actuators of the transmitter is transformed into a serial command that is
coded and transmitted through a high-frequency carrier. The receiver captures the information output from the transmitter, decodes
the messages and sends the controls to the machine by means of electronic power switches controlled by a microprocessor and a
dedicated harness.
The information sent from the transmitter is contained in a message commonly named “telegram”. This telegram consists of an
identifier, a command field and a redundancy field for error control. The identifier, or matching code, contains the identification
elements to match the transmitter with its coupled receiver. The command field contains all the information relevant to the commands
that the machine should carry out. The error control redundancy fields allow the receiver to discard messages that are found modified
by disturbs on the radio link.
As the matching code is unique for each TX/RX pair, each Transmitter can control through radio waves only its coupled Receiver,
which is labeled with the same System Number.
4.2
Use of Batteries
Tecnord’s Radio Control System is equipped with batteries for operating the Transmitter. Rechargeable NiMH batteries are supplied
with the Transmitter unit and guarantee a long operating time.
The working voltage of the transmitter is constantly controlled. Should it fall below a threshold value, the corresponding indication
is activated (green led blinking) each time the transmitter is put into operation. From this moment, the transmitter can continue to
operate, but it is recommended to recharge the batteries as soon as possible. For additional power-saving, a “PowerSave” mode is
implemented (see paragraph 4.8).
Batteries are protected against short –circuit. For additional safety and ease of use, they are located as far as possible from the rest
of the electronics in the Transmitter.
4.3
The battery charger and re-chargeable batteries
The RC-DBX-TU transmitter unit is equipped with a battery charger circuit; therefore it is not necessary to remove the batteries for
the charging operation, and is possible to operate the machine during the battery charging procedure.
In order to charge the batteries, connect the Transmitter to its DBX-RX receiver unit through the battery charger cable supplied
with the equipment. As an option, a different serial cable can be provided, which allows the charge to be carried out while operating
the machine. In order to use the serial cable option, the harness must be provided with an appropriate M12 female connector. The
charging phase for a completely discharged battery can last up to three hours, and it is continously controlled by the microprocessor.
When the battery charger states that charging is complete, it automatically disconnects, therefore avoiding overcharge phenomena that
could reduce batteries life.
WARNING !
Use TECNORD original spare parts only! If not, there is the danger of an explosion. Chemical substances that leak or
parts that detach themselves can cause irreparable damage.
4.4
Control Elements
Tecnord manufactures a family of Industrial Radio Controls suitable for just as many applications. Further more, Industrial Radio
Controls are designed according to the specific requests of the Customer or the User.
Tecnord’s Radio Remote Control Equipment are designed as complete systems for controlling an operating machine’s functions.
Each Radio Control System can be fitted with many different control elements according to the machine to be controlled, as well as
provided with standard controls for its operation, stopping, acoustic warning, start switch, warning led etc.
Push buttons, switches, selectors, joysticks and special control accessories complete the radio control. Their type and number are
features of each “control configuration”.
Configurations “D”, “R”:
up to 6 toggle-switches with 3 positions (1 2 temporary) for the function’s
selection, 1 proportional trigger available for speed control in the “R” configuration
Configuration “M”:
up to 6 PRS (Proportional Rocker Switches, for DBX) or 7 JLP joysticks (for PCM) for the
control of more functions with proportional actuators
For a better diagnosis of the machine’s operating status, the DBX-RX receiver is equipped with a display on which is possible to
make system information available (see paragraph 8.2).
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