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21495344.indd/311007
2 Safety instructions
2.1 Symbol description
These symbols are used to warn against potential safety hazards or causes of
damage or provide useful information.
Hazard warning
This symbol appears in the operating instructions next to all instructions relating to
safety at work wherever a potential danger to life and limb exists.
Follow these instructions at all times and be particularly vigilant and cautious.
Pass on safety instructions to all persons entrusted with working on the product
including the power supply.
In addition, observe all general safety regulations at all times.
Warning against dangerous electrical voltage
Contact with live parts can result in immediate death. Protective covers (e.g.
covers and enclosures) marked with this sign may only be opened by qualified
electricians. Before opening, all relevant operating, control, feed or other voltages
must be disconnected.
Operating hazard for the installation
This symbol in the operating instructions indicates all warnings which, if not com-
plied with, may result in damage to the product.
The DRC-DR radio receiver is intended to be used as a receiver unit for DRC-10
and DRC-J radio transmitters. The scope of functions is exclusively designed for
wireless remote control of crane installations with Demag DR rope hoists.
Thus for these applications, the cable-connected control equipment (control pen-
dant) can be dispensed with. The operator can position himself as required. He
can freely move loads from a safe distance in line with the local conditions.
DRC-DR radio receivers are exclusively intended for single-transmitter operation;
i.e. there is always a clear assignment to a specific radio transmitter (DRC-10 or
DRC-J).
The transmission method used by Demag is designed for the most robust and
interference-resistant radio transmission between the transmitters and receivers of
the DRC range.
The state-of-the-art transmission method is provided with technical features (e.g.
automatic frequency management, adaptive behaviour) which are intended to en-
sure a minimum of conflicts for radio operation together with other transmitter and
receiver devices which use the same frequency range.
Despite all of the technical precautions taken by Demag, it cannot be entirely ex-
cluded that the transmission characteristics of other radio systems are impaired,
in particular devices supplied by other manufacturers that use the same frequency
range, or that the transmission characteristics of the system supplied by Demag
are negatively affected. In such cases, interference or radio connection interrup-
tions may occur, which disrupt the communication and function of a system sup-
plied by Demag or other manufacturers. Such impairment or interference does not
constitute a defect on the part of DRC transmitters and receivers. Demag will only
accept liability for wilful or grossly negligent behaviour on its part.
2.2 Appropriate use
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