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Installation | BODAS controller RC/3x and RC/4x
7.4 Notice on wiring and circuitry
• Electrical isolation is required for connections with systems with a different
electrical ground or power source.
• Lines to the speed sensors are to be shielded and kept as short as possible and be
shielded. The shielding must be connected to the electronics or to the device or
vehicle ground via a low resistance connection (only on one side).
• Twisted pair cables are to be used for CAN and ISOBUS.
• The product may only be wired when it is de-energized.
• Cables to the electronics must not be routed close to other power-conducting
cables in the machine or vehicle.
• The wiring harness must be mechanically fastened in the area in which the
control unit is installed (distance < 150 mm). The wiring harness must be mounted
in such a way that an in-phase excitation with the control unit occurs (e.g. at the
control unit fixing point).
• If possible, lines are to be routed inside the vehicle. If lines have to be routed
outside the vehicle, ensure secure mounting.
• Lines must not be kinked or twisted, must not rub against edges and must not be
routed through sharp-edged ducts without protection.
• Lines are to be routed with sufficient distance from hot or moving vehicle parts.
• PWM outputs must not be connected to one another or bridged.
• The outputs must not be used to operate incandescent lamps due to the inrush
current properties of these loads. Exceptions are permitted for signal lamps with
low power if it is ensured that the inrush current does not exceed the limit values
of this data sheet.
• The sensor supplies can be "pulled up" by an external connection, e.g., the
application of a higher voltage, because they operate only as a voltage source
but not as a voltage sink. Pulling up a sensor supply may result in unexpected
malfunctions and damage the control unit in continuous operation.
• There are restrictions for the operation of LEDs with internal electronics at the
outputs. The input current must be below the diagnostic threshold values.
• If LEDs are operated at power outputs, the diagnostic current may cause the
LEDs to flash.
• The "high-side" outputs may not be externally connected to battery.
• Loads connected to low-side outputs (both power outputs and outputs with
low power) must be supplied by a high-side output and not directly by the battery.
RE 95240-01-B/2021-01-12, Bosch Rexroth AG
17/24
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