RUN EXCITE: Service & Maintenance Manual - rev. 1.5
Page 3.6
• H
EADPHONE
J
ACK
Two jacks are provided on the machine for connecting headphones. The two jacks are
connected in parallel to a stereo output of the CPU board. In addition to the audio signals, the
connector also includes a sense signal for routing the output to the headphones, if installed. The
sense contact is NC and opens when the headphone jack is plugged in.
3.1.2. CSAFE BOARD
This board makes available a communication port, on 2 externally accessible connectors, which can
be used for connecting compatible CSafe devices such as the CardioTheater readers.
These connectors can also be interfaced, using a special cable, to an external PC for programming
the FLASH EEPROM.
3.1.3. TGS/SMART CARD BOARD
This board enables the machine to read the TGS key or Smart Card inserted by the user for
performing workouts programmed with the Wellness System. The machine can be interfaced with
either a TGS key or Smart Card reader, hence its name TGS/Smart Card Board.
3.1.4. HAND SENSOR BOARD
This is the board which manages the hand sensors, interfacing them with the Digital Plan Board. It
processes the analog signal received from the sensors and outputs one positive logic 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. CARDIO RECEIVER
This board manages the signal received from the telemetric transmitter used by the person
exercising, and interfaces it with the Digital Plan Board. The model used is the OnwZone. There are
2 types of receiver:
• HFU Model (on 500 models): this is the standard product. 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.
• OwnZone Model (on 700 and 700E models): this is a special receiver model produced by
Polar, equipped with a microprocessor and capable of independently detecting the heart rate. It
receives the power supply signal from the Digital Plan board, to which it is connected by:
>
a pulse signal: a pulse for every heart beat that is detected;
>
a reset signal: an external reset signal provided by the digital plan board every times an
exercise is started;
>
a serial signal on a I2C protocol.
The receivers 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.
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