Brake relay module Kone KM803942G01
Table of Contents
Brake relay module Kone KM803942G01
Product Name:Kone Brake relay module KM803942G01
Model No:KM803942G01
Brake relay module Kone KM803942G01
Ordering the brake relay module
To order the brake relay module, send the exact model or reference code printed on the original part to [email protected]. Please quote the full code including any suffix so that our team can confirm the correct variant, current stock and lead time before you commit.
About the brake relay module
Elevator and escalator installations are built around a relatively small number of serviceable assemblies, but they fail at very different rates. The brake relay module sits in the control board / PCB group, and it is replaced on a different service interval from the assemblies around it. In practice the failures we see on brake relay module come down to electrolytic capacitor ageing, cracked solder joints around the power stage, corroded edge connectors, and blown output transistors after a supply fault.
Every brake relay module we supply is inspected before dispatch. Each unit is checked for physical damage, correct marking and the specific wear or degradation patterns that matter for this class of component, then packed to survive international transit. Where a superseded revision is the only one available, we say so plainly and explain the substitution, so the installing engineer can make an informed decision rather than discovering the difference on site.
Buying guidance and compatibility notes
Before ordering the brake relay module, confirm three things. First, the controller catalogue number and the board revision letter, plus the fault code stored in the controller memory. Second, the same board is frequently fitted across several controller families, so the equipment model alone is not enough to identify the right revision. Third, whether the installation is a traction lift or an escalator, since duty cycle and loading differ between the two.
On fitting, one point is worth repeating: discharge the DC bus before removing a power board, and photograph the connector layout before you unplug anything. Almost every repeat failure we see on brake relay module traces back to a related component that was left in place, or to an adjustment that was assumed rather than measured.
The practical difficulty with legacy boards is that the original manufacturer may have revised the design three or four times without changing the order code. A board that looks identical to the one you removed can be electrically different, and fitting the wrong revision is a common cause of repeat faults.
The main board is the component that a service engineer reaches for first when a lift stops without a mechanical cause, and the symptom that most often brings an engineer to it is a lift that travels but refuses to level or open its doors.
Firmware is the hidden variable. Two boards with the same part number can carry different firmware revisions, and a replacement that is electrically correct may still need a parameter download before the lift will run properly. Where we know this applies, we say so before shipping.
A unit showing a drive that trips on acceleration but runs normally at low speed is usually telling you that we ask for a photograph of the rating plate as well as the board, since the same board is shared across families.
The power stage is where most board failures originate, and it is usually a symptom rather than a cause. Blown output devices normally follow a motor, cable or supply fault, so replacing the board without finding the underlying problem is a reliable way to destroy the replacement as well.
If you are unsure which variant of the brake relay module you need, send a photograph of the nameplate and the existing component alongside a description of the fault. That is usually enough for our team to identify the correct replacement without a site visit, and it avoids the cost and delay of returning an incompatible part. We are also happy to advise on the other serviceable items in the same control board / PCB group, so a planned shutdown can cover several wear items at once.
Related parts and further reading
Because brake relay module is only one item in the control board / PCB group, these related pages may help you plan the work:
- Elevator spare parts
- Door Operator Controller
- Elevator Display
- Elevator Encoder
- Elevator Service Tool
Reference sources
The compatibility information on this page was cross-checked against the following authoritative references. Always confirm the exact reference against your own equipment nameplate.
