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Analog amplifier RA
| Safety instructions
Bosch Rexroth AG, RE 95230-B/2021-12-01
• Only commission the product if it has been determined that the end product
(e.g. machinery/system) in which the Rexroth products are installed complies
with the country-specific provisions, safety regulations and standards for the
application.
• Use tools appropriate for the work being performed and wear appropriate
protective clothing to prevent punctures and cuts (e.g. when removing protective
covers, disassembly).
• Setup, installation and operation of the device cannot be monitored. The user is
therefore responsible for the correct use of the product. The valid manufacturer's
specifications for the machine/vehicle must be observed during installation.
• In contrast to digital control units, analog amplifiers only offer limited diagnosis
and monitoring options. The use of an analog amplifier in applications
in which – in the event of an error – hazardous machine states may arise,
is therefore not permissible without additional external protective measures.
• The safety instructions of the machine/vehicle must be observed.
• If an analog amplifier fails, malfunctions such as unintended actuation or
switching off of one or several solenoids cannot be reliably prevented.
• In emergency situations or if important functions fail, the operating voltage is
to be externally interrupted. To this end, interruption of the electronics’ power
supply has to be provided by means of an emergency stop switch.
The emergency stop switch must be installed in an easily accessible position for
the operator. Safe braking must be ensured when the emergency stop function is
activated.
• Damaged devices must not be commissioned.
• No connection to public supply networks is permitted.
• Mixing up the ground connections at the analog amplifier may impair
functionality.
• If the solenoid output is overloaded (short circuit), the relevant output is not
constantly switched off.
• In case of cable break at one of the external potentiometers, the outputs may still
carry current and are not switched off for all connection variants. In this case,
the error output (pin 15) is activated, depending on the connection type.
• To avoid malfunctions, the shield of the lines from and to the potentiometers
is to be connected to the device and/or vehicle ground on one side with low
resistance.
• The analog amplifier must not be wetted by hydraulic fluids, acids or alkalis.
• The suggested circuits do not imply any technical liability for the system on the
part of Rexroth.
