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Surface Mount 230V Relay Module with Lithium Back-Up Battery - Ei128RBU

5 out of 5 stars
£76.79 inc VAT
£63.99 ex VAT
Product Overview

The Ei128RBU is a 230V mains powered relay module with rechargeable lithium battery back up. Designed for use with the Ei140, Ei160e, Ei2110e, and Ei3000 series of alarms, the Ei128RBU relay module signals external devices such as panels and call systems when any of the interconnected alarms are activated. The module has additional trunking knockouts for ease of wiring and can be installed underneath any smoke or heat alarm in the system.

  • 5 year warranty
  • Surface mount 230V relay module with rechargeable built-in lithium battery back up
  • Suitable for use with theEi140, Ei160e, Ei2110e, and Ei3000 series of alarms
  • Discreet installation behind any of the interconnected smoke and heat alarms
  • Supplied with volt free contacts (normally open and normally closed) - rated up to 240V AC / 5 amps
  • Can be configured to give a 230V or 24V output
  • Sends a signal to connected external devices when an alarm is activated
  • Fitted with a 4 way connector block
  • 3 x 25mm trunking knockouts for surface wiring and centre knockout for recess wiring
  • Provides continuous or pulse output
  • Lithium battery back up has a 10 year life
  • Used to connect to devices such as panels and nurse / warden call systems
Technical Data
Product Code Ei128RBU
Brand EI Electronics
Back-Up Battery

Rechargeable lithium (10 year life)

Dimensions (HxDia)


Power Source

230V with battery back up

Weight 0.18kg
Product Datasheets

Pricing & Availability

Model Stock Price
Product Code: Ei128RBU Stock Level:
2 in stock Expected dispatch: 28th May

£76.79 inc VAT

£63.99 ex VAT

Delivery Options

The following delivery options are available on this product.

Standard Delivery

£3.19 inc VAT - Orders will be delivered in 2-3 working days with Evri

Next Working Day Delivery

£6.19 inc VAT - Orders will be delivered the next working day with Evri

For dispatch today order within

Customer Reviews

1 customer has given this product an overall rating of 5 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by:

I installed many of these detectors which are more than fit for purpose

Published on: 3rd March 2018

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