Laird Controls North America Inc. 818A ユーザーズマニュアル
Command Pro Engineered Systems
User Manual
User Manual
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Figure 11: 21R22 Status LED Indicators - Transmitter ON
6. Verify that voltage is present between the receiver output to the Main Line Contactor (MLC)
terminal 4 of TB4.
7. Verify that no voltage is present between any of the relay output terminals that are used for your
application.
8. If voltage is present at any output terminal that is used, recheck the system wiring
6.6 Installation Procedure – SAFE-T-RANGE (21R22CR)
Laird's ‘Safe-T-Range™’ is the latest advancement in wireless crane controls. ‘Safe-T-Range™’ keeps the
operator within a pre-determined distance from the crane, thus increasing safety in the workplace. Using an
advanced panel antenna design along with programmable logic, a ‘Safe-T-Range™’-equipped receiver draws
an electronic boundary around the crane and operator. The system then safely stops and inhibits selected
functions when the operator steps outside the boundary. This is done without shutting down the main
contactor line.
6.6.1 21R22CR Power/Control Wiring
6.6.2 21R22CR Antenna Installation
The 21R22CR Receiver must be set up correctly using a special antenna and circuitry for the controlled range
function to operate properly. Use the following procedure as a supplement to the 21R22 Installation
Procedure.
The antenna for the 21R22CR has a specially shaped pattern that provides a sharp drop-off in signal strength
The antenna for the 21R22CR has a specially shaped pattern that provides a sharp drop-off in signal strength
when the operator moves away from the antenna. The antenna has a shaped beam much like a broad flood
lamp, as shown in the following illustration.