In this mode, there are two wireless transmitters and two receivers (one for each crane). One of the transmitters is configured as primary and the other as secondary, the same applies to the receivers.

The user can choose the crane he wants to work individually, or can use the primary transmitter to work in tandem mode, that is, to be able to control simultaneously both cranes. When any of the signals are activated (by speed/end limit switch or by overloading the hoists, for example), it will immediately communicate to the 2nd receiver to stop, resulting in both cranes stopping instantly. The stop function is in accordance with the SIL3 PLe level.

Another situation that requires an advanced and inter-communicated system is when we add a third crane in the same factory for such intended application. Necessary when the loads to handle are even greater in dimensions and/or higher tonnage. Very common in the wind industry to raise huge wind towers and their parts.

Each crane requires its standard equipment, with a transmitter and a receiver. Equipment #2 (the central position in the building) is configured as primary, since it will be the common one in any of the cases in tandem.

The user will be able to select the desired crane to work individually, but also can use the primary transmitter at any time to work in tandem mode to control 1 + 2 (crane # 1 + crane # 2) or 2 + 3 (crane # 2 + crane # 3). To do this properly and safely, it is necessary that the secondary transmitters of cranes 1 and 3 respectively have logged out accordingly. It will never be able to control a crane with two transmitters at the same time, due to the intrinsic safety of Tele Radio’s Tiger remote control equipment and its high level of safety (SIL3 PLe certified).