55M3500MNE rev. E
Telescopic cranes with derrick pressure sensors Calibration Manual i3500
45
For the angle sensor the ADXL203 generates signals between 1.5V and 3.5V on each
of the 2 axes.
Acceptable range:
Min: 819 bits (1.0Volts)
Max: 3277 bits (4.0Volts)
Note: In the case of an error, the angle value sent is 999°.
For the DR+ reference voltage an error is indicated if the DR+ reference voltage is lower
than 4.5 volts DC, or higher than 5.5 volts DC.
3.1.2 Basic accelerometer’s calibration:
No jumper should be on the connector’s header “CAL” because this calibration is done
at the factory. Warning: when there is a jumper in place, the interface will not work in its
normal operation mode. If the “CAL” jumper (pre-calib.) is left in place, an error will
display on the i3500 system in the normal operation mode.
3.1.3 ATB
In order to activate the ATB, switch 4 must be turned ON. If the ATB is not linked to the
systems, ignore this section. Multiple ATBs can be installed on a crane and they will be
supported by the display, as long as they are enabled. The ATB signal is sent to the
display and to the relay board. The relay coil assigned to the ATB is controlled directly
and exclusively by the signal received by the angle/ATB board.
3.2
Relay and digital input interface board:
There are two models of relay boards, one composed of 5 relays (4 Bosch relays with 5
amp contacts + 1 “OMRON” relays with 2 amp), and another with 8 “OMRON” relays
with 2 amp contacts.
If the relay board loses communication with the Angle/Length and ATB interface board,
the ATB will no longer function. The relay board will block the power to the coil of the
relay assigned to the ATB at around 550ms.
The Relay board is designed to supervise the communications with the I3500 system. If
the relay board loses any communication with the I3500 system, it will automatically
block all power to the coils of relays on the relay board within 5 seconds.
