Relay board for SIGMA(DSS) Elevator
Table of Contents
Relay board for SIGMA(DSS) Elevator
EMR-100 CNA rev 1.0
Elevator PCB EMR-100 CNA,
Relay board for SIGMA(DSS) Elevator,
Elevator spare parts, 210*135*50 mm
EMR-100 DSS SIGMA Elevator Brake Power board CNA Sigma elevator parts
Ordering the relay board
To order the relay board, 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 relay board
Elevator and escalator installations are built around a relatively small number of serviceable assemblies, but they fail at very different rates. The relay board 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 relay board 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 relay board 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 Where a superseded revision is the only one available, we say so plainly and explain the substitution, so the installing engineer can make an informed decision rather than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 relay board, 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 relay board 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.
Where the root cause is corrosion on edge connectors where the machine room has been damp, in our experience the cooling path and DC bus capacitors are flagged as items to check at the same time.
Optical isolation protects the low-voltage side of a controller from the drive stage, and when it fails the symptoms can look like a processor fault. Testing the isolators is often quicker than swapping the main board and is worth doing before committing to a replacement.
If you are unsure which variant of the relay board 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 relay board 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.
