Mitsubishi AC control · hotels

Knode™

Keycard-driven air-conditioning control for guest rooms running Mitsubishi units. The room cools when the guest is in it and follows your energy policy when they are not — and the do-not-disturb, make-my-room and laundry buttons on the wall finally go somewhere useful.

Mitsubishi MBus
Keycard occupancy setback
DND · Make my room · Laundry
Runs without a server

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What it is

Our room module, packaged for hotels that just need this part

Knode is the TCM Module — the same room device that sits in TCMsys installations — sold on its own for properties running Mitsubishi air conditioning that want keycard-driven control without committing to a site-wide system.

It connects to the indoor unit’s own service port and to the guest-input wiring you almost certainly already have behind the wall plate. From there it enforces your occupancy policy on its own, with nothing else installed in the building.

It is the same hardware, the same firmware and the same commissioning process as our hotel systems, because it is the same product. What changes is how much of the rest you buy.

Operating temperature: 0 °C to +50 °C
Storage temperature: −20 °C to +70 °C
Humidity: 10–90 % RH, non-condensing
Ingress protection: IP20, indoor
Supply: 85–265 V AC, 50/60 Hz
Power draw: Under 3 W
Protection: Fuse, surge and TVS clamping
Guest inputs: Opto-isolated, 5 kV rms

Knode A

The standard guest-room build: Mitsubishi MBus control plus the full set of opto-isolated guest inputs — keycard, door, do-not-disturb, make-my-room and laundry.

Knode B

The second build in the range, covering installations whose wiring or input arrangement differs from the standard guest room. Both variants share the same firmware, the same commissioning process and the same dashboard.

Capabilities

What it does in the room

Keycard-driven

The room knows whether anyone is in it. The unit comes back to the guest’s setting when they return and falls back to your energy policy when they leave — with no action from the front desk and no cooperation required from the guest.

Guest request buttons

Do-not-disturb, make-my-room and pick-my-laundry are wired into the same module and reported as events against the room. Housekeeping works from a live queue instead of a paper round.

Door detection

Opto-isolated 230 V door sensing feeds the door-open alarm and, if you want it, an automatic AC response when a door is propped open with the unit running.

Policy stored in the room

Setback behaviour, delays and door-alarm response live on the module. They keep working with no server, no gateway and no network — and they survive a power cut.

Guest remote still works

Guests are not locked out of their own room. They adjust the unit as normal, within whatever limits you have set. The system corrects on vacancy rather than fighting the guest.

Grows into the full system

Start with keycard AC control on a floor. Add the gateway and coordinator later and the same modules become a full TCMsys installation — alarms, reporting, PMS-driven pre-arrival — without rewiring a single room.

Energy

Pick the policy that suits your property

A budget hotel wants the unit off. A luxury hotel would rather hold a comfortable setpoint than risk a guest returning to a hot room. Both are right for their property, so both are configurable — per room or per floor.

Off after delay

The unit shuts down a configurable number of minutes after the room goes vacant. The strategy for budget and mid-market properties.

Setback setpoint

The unit drops to a holding setpoint instead of stopping, so the room is never far from comfortable. The strategy for luxury properties.

Combined

Hold the setback setpoint for a period, then shut down. Both savings and a recoverable room.

The guest is not the enemy

Plenty of hotel energy schemes work by taking control away from the guest — locked setpoints, units that shut off while someone is in the room. Guests notice, and they mention it in reviews. Knode leaves the remote working and acts on vacancy instead.

Savings that survive an outage

The energy policy is stored on the module in the room. It does not need a server, a gateway or a network to run, and it comes back by itself after a power cut. The saving is not conditional on your IT.

One device, one cable

AC control and every guest-request button on the same module, powered from the room’s own circuit. There is no central low-voltage supply to design and nothing else to install behind the wall.

A floor at a time

You do not have to do the whole building to find out whether it works. Fit a floor, measure it, and extend when the numbers justify it.

Control surface

What it can set and read

Everything the unit exposes on its service port, in both directions.

Power

Range: On / off

Mode

Range: Cool, heat, dry, fan, auto

Setpoint

Range: 16–31 °C in half-degree steps where the unit supports it

Fan

Range: Auto, quiet, and the unit’s speed range

Vertical vane

Range: Auto, fixed positions, swing

Horizontal vane

Range: Full left-to-right range plus swing

Room temperature

Range: Read live from the unit’s own sensor

Fault codes

Range: Read and translated to readable descriptions

Parameter	Range
Power	On / off
Mode	Cool, heat, dry, fan, auto
Setpoint	16–31 °C in half-degree steps where the unit supports it
Fan	Auto, quiet, and the unit’s speed range
Vertical vane	Auto, fixed positions, swing
Horizontal vane	Full left-to-right range plus swing
Room temperature	Read live from the unit’s own sensor
Fault codes	Read and translated to readable descriptions

Growth path

Start here, extend later, rewire nothing

The reason to buy the module from us rather than a generic keycard relay is what happens next. Knode is the first layer of a system, not a dead end.

Knode alone

Modules in rooms, policy stored locally, nothing else installed. Occupancy-driven AC control and guest request buttons that work.

Add the bus

Add segment gateways and a coordinator and the same modules become a monitored system — live dashboard, alarms, housekeeping queue, energy reporting.

Add the front desk

Connect the property management system for pre-arrival comfort, checkout policy and room moves that follow the guest. Full TCMsys, same modules in the same rooms.

No stranded investment. Every module you fit as a Knode installation is a module you keep when you extend. The upgrade adds equipment in the riser and the plant room — it does not touch the guest rooms again.

Try it on one floor

Send us your room count and the Mitsubishi models installed. We will confirm compatibility, size a single-floor trial, and be straightforward about what you can expect the saving to be.

Request a demo sales@tes.ind.in