Powering a Gateway

Power options Gateway E32, S32 and S32-LR

Service jack

If your boiler has a service jack, just connect the Gateway with the 3,5mm jack cable. The service jack has pins for both the EMS bus and an additional power supply for peripherals. You do not need to add an external power supply in this case.

Splitting service jack power

If you have f.i. a KM50 module already on the service jack, then you can split the jack connector with a 3,5mm audio splitter. This method is not recommended and it may not always work, but you can try. Use a high quality connector type splitter and not one with long cables attached as these cables are intended for audio and thus have very thin wires inside. If the KM50 or the Gateway does not work via the splitter cable, you need to remove the splitter and connect the Gateway to the BUS terminal and add an external power supply.

audio splitter

External power supply

If your boiler does not have a service jack, or it does but you want to mount the Gateway elsewhere, you need to use an external power supply. A suitable power supply is optional when buying a Gateway. If you want to use your own, see the specifications in the table below.

DC power supply

USB port

Although the enclosure is not designed for this, Gateway models S32 and S32-LR can also be powered from the internal USB port. The E32 cannot be powered from this port (if available). Remove the side piece of the enclosure to make use of the USB port.

Power requirements external DC power supply

If you want to use your own power supply with a Gateway, it needs to have the following minimum requirements:

Parameter

Specification

Voltage output

5,5V-13V DC

Current output

200mA or more

Plug

DC barrel jack 5,5mm

Polarity

center pin positive

It’s recommended to use a high quality power supply. One that was included with an old router for instance will work well. Do not use a cheap power supply from Aliexpress or Ebay, as they may introduce noise on the EMS bus.

Power options Gateway Premium II

Service jack

See information above.

Bus power

The Premium II can also be powered from the EMS bus itself. Just connect the two EMS bus wires to the screw terminal. If the Gateway does not work, or does not work well you need to add a USB power supply.

USB port

Although the enclosure is not designed for this, the Premium II can also be powered from the internal USB port. Remove the side piece of the enclosure to make use of the USB port.