Technogym Step 500i, Руководство по техническому обслуживанию

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STEP EXCITE: Service & maintenance manual - rev. 1.4
Page 3.8
3.1.3. TGS
READER
This board enables the machine to read the user's TGS key for performing workouts programmed
with the Wellness System.
3.1.4. H
AND
S
ENSOR
B
OARD
This is the board which manages the hand sensors, interfacing them with the Display board. It
processes the analog signal received from the sensors and outputs one pulse for each heart beat that
is detected. The signal level is normally 5 Vdc; it goes to 0 Vdc when the user's hands are placed on
the contacts, and a 5 Vdc pulse (having a width of approximately 30 msec) is output at each
detected heart beat.
3.1.5. C
ARDIO RECEIVER
This board manages the signal received from the telemetric transmitter used by the person
exercising. It receives the power supply signal from the display board and outputs a negative logic
pulse for every heart beat that is detected: the signal level is normally 5 Vdc, with a pulse at 0 Vdc
(having a width of approximately 30 msec) at each heart beat.
The receiver reception area is approximately a circle with a 1 m radius. If there is electromagnetic
noise (produced by high voltage lines, radio transmitters, monitors, motors etc.) within this area, the
receiver becomes saturated and no longer receives any signal.
3.1.6. C
ONNECTORS PANEL
This is located on the side of the front platform, and provides a connector for the antenna cable (on
700i E model only).
3.1.7. B
RAKE BOARD
There are 2 versions of the Brake board, one which is used on the mains powered version and the
other on the self-powered version. In either case, the Brake board consists of:
•
Power supply section which generates the low voltages used by the machine: +5 Vdc and +12
Vdc. Depending on the machine version, these voltages will be generated either from the 110
VAC or 220 VAC mains supply, or from the alternator-battery.
•
Section for RS-485 serial communications with the Display Board for:
-
commands determining the resistance that is required of the brake;
-
brake error messages;
-
commands for modifying the circuit board configuration parameters;
-
commands for viewing the errors logged by the circuit board.
•
Section which generates the current for the brake winding: varying the current produces a
proportional variation in the resistance of the brake. The excitation current supplied to the brake
is a function of the effort level selected on the display and the RPM value measured by the
speed sensor (angular velocity of the brake disk) and is determined by the values stored in the
braking table.