Crane LMI Three-Color Signal Tower Light
This three-color signal tower light is a visual alarm indicator reference for crane load moment indicator (LMI) or related warning systems. The existing listing references XCMG, SANY and ZOOMLION cranes, but the electrical interface and control logic must be confirmed for the exact machine.
Typical Visual Function
A red, amber and green light stack can communicate changing operating or warning states to personnel near the crane. The precise meaning of each color is determined by the installed LMI or crane control system; it should not be assumed from the lamp alone.
Identification Checklist
Crane brand, model and complete serial number
LMI controller or display make and system reference
Rated voltage shown on the original lamp
Connector shape, pin count, cable length and wire-side photo
Mounting base, hole spacing, pole or bracket arrangement
Light order, buzzer presence and original control behaviour
Electrical Compatibility
Signal towers with the same red-amber-green appearance may use different voltages, common-wire arrangements or switching methods. Do not connect a replacement until the wiring and control output are confirmed. An incorrect connection can damage the lamp or controller and may produce misleading warnings.
Inspection and Functional Test
Inspect the lens stack for cracking or water entry, the base for vibration damage and the cable for abrasion. Check connector terminals and the LMI output before replacing the lamp. After installation, verify every color and audible alarm, if fitted, through the approved crane test procedure.
Packing
Transparent lenses are protected with shaped cushioning and the mounting base is restrained separately. The connector is capped, and the package label identifies the confirmed system reference and included accessories.
Frequently Asked Questions
Can one signal light work across XCMG, SANY and ZOOMLION cranes?
Only when voltage, connector, wiring and control logic match; brand names alone do not confirm interchangeability.
Does each color always mean the same operating state?
No. The crane’s LMI and control documentation defines the meaning and trigger condition.
What should be tested after installation?
Test every light color, any buzzer and the corresponding LMI warning output under the approved procedure.
